Extracting prog: 2m29.156131314s
Minimizing prog: 19m8.014398036s
Simplifying prog options: 0s
Extracting C: 24.197970472s
Simplifying C: 2m59.176901714s


extracting reproducer from 49 programs
testing a last program of every proc
single: executing 11 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-prlimit64-sched_setscheduler-syz_clone-pselect6
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000000)='ext4\x00', &(0x7f0000000040)='./file0\x00', 0x10008, &(0x7f0000000100)={[{@debug}, {@resuid={'resuid', 0x3d, 0xee01}}]}, 0xff, 0x49e, &(0x7f0000000140)="$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")
prlimit64(0x0, 0xe, &(0x7f0000000080)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f00000000c0)=0x8)
syz_clone(0x11, 0x0, 0x0, 0x0, 0x0, 0x0)
pselect6(0x2a, 0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$802154_raw-socket$pppl2tp-ioctl$SIOCGIFMTU-prlimit64-sched_setscheduler-getpid-sched_setaffinity-sched_setscheduler-mmap-socketpair$unix-connect$unix-sendmmsg$unix-recvmmsg-clock_getres-openat$tun-ioctl$TUNSETIFF-ioctl$TUNSETDEBUG-mmap-socket$nl_route-sendmsg$nl_route-sendmsg$nl_route-ioctl$TUNSETLINK-socket-socket$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-connect$pppl2tp
detailed listing:
executing program 0:
syz_init_net_socket$802154_raw(0x24, 0x3, 0x0)
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
ioctl$SIOCGIFMTU(r0, 0x8921, &(0x7f0000000000)={'veth1_to_bond\x00'})
prlimit64(0x0, 0xe, &(0x7f0000000040)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
r1 = getpid()
sched_setaffinity(0x0, 0x8, &(0x7f00000000c0)=0x2)
sched_setscheduler(r1, 0x1, &(0x7f0000000100)=0x7)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0xb635773f06ebbeee, 0x8031, 0xffffffffffffffff, 0x0)
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000140)={<r2=>0xffffffffffffffff, <r3=>0xffffffffffffffff})
connect$unix(r2, &(0x7f0000000180)=@abs, 0x6e)
sendmmsg$unix(r3, &(0x7f0000000200), 0x651, 0x0)
recvmmsg(r2, &(0x7f0000000240), 0x4000087, 0x2, 0x0)
clock_getres(0xd6c79f3ee28bc1b, 0x0)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000280), 0x1c1341, 0x0)
ioctl$TUNSETIFF(r4, 0x400454ca, &(0x7f00000002c0)={'pimreg1\x00', 0x84aebfbd6349b7f2})
ioctl$TUNSETDEBUG(r4, 0x400454c9, 0xffffffffffffffff)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000002, 0x28011, 0xffffffffffffffff, 0x0)
r5 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(0xffffffffffffffff, &(0x7f0000000300)={0x0, 0x4076cbba9945d516, &(0x7f0000000340)={0x0, 0x14}}, 0x0)
sendmsg$nl_route(r5, &(0x7f0000000380)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000200)=ANY=[@ANYBLOB="380000001000390400000010000000", @ANYRES32=0x0, @ANYBLOB="f18c0600002b8e6681e75da38fbae81b4206670577d10d7321000900690d000000000000026f08"], 0x38}, 0x1, 0x0, 0x0, 0x20044058}, 0x0)
ioctl$TUNSETLINK(r4, 0x400454cd, 0x339)
r6 = socket(0x10, 0x803, 0x0)
r7 = socket$unix(0x1, 0x1, 0x0)
ioctl$sock_SIOCGIFINDEX(r7, 0x8933, &(0x7f0000000440)={'team_slave_1\x00', <r8=>0x0})
sendmsg$nl_route_sched(r6, &(0x7f0000000540)={0x0, 0x0, &(0x7f0000000580)={&(0x7f00000005c0)=@newtfilter={0xbc, 0x2c, 0xd2b, 0x70bd2b, 0x25dfdbfb, {0x0, 0x0, 0x0, r8, {0x3}, {0x0, 0x8c}, {0x4, 0xfff3}}, [@filter_kind_options=@f_u32={{0x8}, {0x90, 0x2, [@TCA_U32_CLASSID={0x8, 0x1, {0x9, 0x4}}, @TCA_U32_SEL={0x84, 0x5, {0xb, 0x8, 0x7, 0x7, 0x0, 0xefdf, 0x2, 0x84c, [{0x4, 0x24c900, 0x1, 0x32ec}, {0x9, 0x8001, 0x7, 0x1c00}, {0x9, 0xc3b, 0x80000001, 0x4}, {0xffff, 0x4, 0x2, 0x9}, {0x3, 0x8, 0x5c, 0x4}, {0xc8f, 0x7}, {0x1, 0xeb, 0x401, 0xd}]}}]}}]}, 0xbc}}, 0x24040084)
connect$pppl2tp(r0, &(0x7f0000000680)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x4, 0x5, 0x2, 0x3, {0xa, 0x2, 0x0, @local, 0x9}}}, 0x32)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-syz_clone3-syz_extract_tcp_res-ioctl$EXT4_IOC_GETFSUUID-mount$9p_fd-socket$inet6-connect$inet6-dup2-write$evdev-socket-setsockopt$netlink_NETLINK_TX_RING-sendmsg$nl_generic-ioctl$FS_IOC_SETFLAGS
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
syz_extract_tcp_res(&(0x7f0000000780), 0x80000001, 0x323)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)
mount$9p_fd(0x0, &(0x7f0000000840)='./file0\x00', &(0x7f0000000880), 0x21c6081, &(0x7f0000000980)={'trans=fd,', {'rfdno', 0x3d, r3}, 0x2c, {'wfdno', 0x3d, r3}, 0x2c, {[{@access_user}, {@uname={'uname', 0x3d, '/dev/net/tun\x00'}}], [{@fscontext={'fscontext', 0x3d, 'user_u'}}, {@fsmagic={'fsmagic', 0x3d, 0x800}}, {@subj_type={'subj_type', 0x3d, ')%^\xe6}*,:'}}, {@defcontext={'defcontext', 0x3d, 'sysadm_u'}}, {@smackfsfloor={'smackfsfloor', 0x3d, ' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}, {@obj_type={'obj_type', 0x3d, '},\xed'}}, {@obj_role={'obj_role', 0x3d, '\xaa\xaa\xaa\xaa\xaa'}}, {@obj_type={'obj_type', 0x3d, '/dev/net/tun\x00'}}, {@context={'context', 0x3d, 'unconfined_u'}}, {@smackfstransmute={'smackfstransmute', 0x3d, '[-.}\xa4]*'}}]}})
r6 = socket$inet6(0xa, 0x3, 0xff)
connect$inet6(r6, &(0x7f00000007c0)={0xa, 0xf3, 0x4, @mcast1, 0x5}, 0x1c)
r7 = dup2(r6, r6)
write$evdev(r7, &(0x7f0000000800)=[{{}, 0x1, 0x6, 0x3}, {{0x0, 0x2710}, 0x3a, 0xf, 0x2000081}], 0x30)
r8 = socket(0x10, 0x3, 0x0)
setsockopt$netlink_NETLINK_TX_RING(r8, 0x10e, 0xc, &(0x7f0000000080)={0x6}, 0x10)
sendmsg$nl_generic(r8, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000140)=ANY=[@ANYBLOB="1c0000005200010700bd7000ffdbdf2502"], 0x1c}}, 0x800)
ioctl$FS_IOC_SETFLAGS(r5, 0x40086602, &(0x7f0000000000)=0x4000)

program crashed: KASAN: use-after-free Read in l2tp_tunnel_get_session
single: successfully extracted reproducer
found reproducer with 25 syscalls
minimizing guilty program
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-syz_clone3-syz_extract_tcp_res-ioctl$EXT4_IOC_GETFSUUID-mount$9p_fd-socket$inet6-connect$inet6-dup2-write$evdev-socket-setsockopt$netlink_NETLINK_TX_RING-sendmsg$nl_generic
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
syz_extract_tcp_res(&(0x7f0000000780), 0x80000001, 0x323)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)
mount$9p_fd(0x0, &(0x7f0000000840)='./file0\x00', &(0x7f0000000880), 0x21c6081, &(0x7f0000000980)={'trans=fd,', {'rfdno', 0x3d, r3}, 0x2c, {'wfdno', 0x3d, r3}, 0x2c, {[{@access_user}, {@uname={'uname', 0x3d, '/dev/net/tun\x00'}}], [{@fscontext={'fscontext', 0x3d, 'user_u'}}, {@fsmagic={'fsmagic', 0x3d, 0x800}}, {@subj_type={'subj_type', 0x3d, ')%^\xe6}*,:'}}, {@defcontext={'defcontext', 0x3d, 'sysadm_u'}}, {@smackfsfloor={'smackfsfloor', 0x3d, ' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}, {@obj_type={'obj_type', 0x3d, '},\xed'}}, {@obj_role={'obj_role', 0x3d, '\xaa\xaa\xaa\xaa\xaa'}}, {@obj_type={'obj_type', 0x3d, '/dev/net/tun\x00'}}, {@context={'context', 0x3d, 'unconfined_u'}}, {@smackfstransmute={'smackfstransmute', 0x3d, '[-.}\xa4]*'}}]}})
r6 = socket$inet6(0xa, 0x3, 0xff)
connect$inet6(r6, &(0x7f00000007c0)={0xa, 0xf3, 0x4, @mcast1, 0x5}, 0x1c)
r7 = dup2(r6, r6)
write$evdev(r7, &(0x7f0000000800)=[{{}, 0x1, 0x6, 0x3}, {{0x0, 0x2710}, 0x3a, 0xf, 0x2000081}], 0x30)
r8 = socket(0x10, 0x3, 0x0)
setsockopt$netlink_NETLINK_TX_RING(r8, 0x10e, 0xc, &(0x7f0000000080)={0x6}, 0x10)
sendmsg$nl_generic(r8, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000140)=ANY=[@ANYBLOB="1c0000005200010700bd7000ffdbdf2502"], 0x1c}}, 0x800)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-syz_clone3-syz_extract_tcp_res-ioctl$EXT4_IOC_GETFSUUID-mount$9p_fd-socket$inet6-connect$inet6-dup2-write$evdev-socket-setsockopt$netlink_NETLINK_TX_RING
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
syz_extract_tcp_res(&(0x7f0000000780), 0x80000001, 0x323)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)
mount$9p_fd(0x0, &(0x7f0000000840)='./file0\x00', &(0x7f0000000880), 0x21c6081, &(0x7f0000000980)={'trans=fd,', {'rfdno', 0x3d, r3}, 0x2c, {'wfdno', 0x3d, r3}, 0x2c, {[{@access_user}, {@uname={'uname', 0x3d, '/dev/net/tun\x00'}}], [{@fscontext={'fscontext', 0x3d, 'user_u'}}, {@fsmagic={'fsmagic', 0x3d, 0x800}}, {@subj_type={'subj_type', 0x3d, ')%^\xe6}*,:'}}, {@defcontext={'defcontext', 0x3d, 'sysadm_u'}}, {@smackfsfloor={'smackfsfloor', 0x3d, ' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}, {@obj_type={'obj_type', 0x3d, '},\xed'}}, {@obj_role={'obj_role', 0x3d, '\xaa\xaa\xaa\xaa\xaa'}}, {@obj_type={'obj_type', 0x3d, '/dev/net/tun\x00'}}, {@context={'context', 0x3d, 'unconfined_u'}}, {@smackfstransmute={'smackfstransmute', 0x3d, '[-.}\xa4]*'}}]}})
r6 = socket$inet6(0xa, 0x3, 0xff)
connect$inet6(r6, &(0x7f00000007c0)={0xa, 0xf3, 0x4, @mcast1, 0x5}, 0x1c)
r7 = dup2(r6, r6)
write$evdev(r7, &(0x7f0000000800)=[{{}, 0x1, 0x6, 0x3}, {{0x0, 0x2710}, 0x3a, 0xf, 0x2000081}], 0x30)
r8 = socket(0x10, 0x3, 0x0)
setsockopt$netlink_NETLINK_TX_RING(r8, 0x10e, 0xc, &(0x7f0000000080)={0x6}, 0x10)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-syz_clone3-syz_extract_tcp_res-ioctl$EXT4_IOC_GETFSUUID-mount$9p_fd-socket$inet6-connect$inet6-dup2-write$evdev-socket
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
syz_extract_tcp_res(&(0x7f0000000780), 0x80000001, 0x323)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)
mount$9p_fd(0x0, &(0x7f0000000840)='./file0\x00', &(0x7f0000000880), 0x21c6081, &(0x7f0000000980)={'trans=fd,', {'rfdno', 0x3d, r3}, 0x2c, {'wfdno', 0x3d, r3}, 0x2c, {[{@access_user}, {@uname={'uname', 0x3d, '/dev/net/tun\x00'}}], [{@fscontext={'fscontext', 0x3d, 'user_u'}}, {@fsmagic={'fsmagic', 0x3d, 0x800}}, {@subj_type={'subj_type', 0x3d, ')%^\xe6}*,:'}}, {@defcontext={'defcontext', 0x3d, 'sysadm_u'}}, {@smackfsfloor={'smackfsfloor', 0x3d, ' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}, {@obj_type={'obj_type', 0x3d, '},\xed'}}, {@obj_role={'obj_role', 0x3d, '\xaa\xaa\xaa\xaa\xaa'}}, {@obj_type={'obj_type', 0x3d, '/dev/net/tun\x00'}}, {@context={'context', 0x3d, 'unconfined_u'}}, {@smackfstransmute={'smackfstransmute', 0x3d, '[-.}\xa4]*'}}]}})
r6 = socket$inet6(0xa, 0x3, 0xff)
connect$inet6(r6, &(0x7f00000007c0)={0xa, 0xf3, 0x4, @mcast1, 0x5}, 0x1c)
r7 = dup2(r6, r6)
write$evdev(r7, &(0x7f0000000800)=[{{}, 0x1, 0x6, 0x3}, {{0x0, 0x2710}, 0x3a, 0xf, 0x2000081}], 0x30)
socket(0x10, 0x3, 0x0)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-syz_clone3-syz_extract_tcp_res-ioctl$EXT4_IOC_GETFSUUID-mount$9p_fd-socket$inet6-connect$inet6-dup2-write$evdev
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
syz_extract_tcp_res(&(0x7f0000000780), 0x80000001, 0x323)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)
mount$9p_fd(0x0, &(0x7f0000000840)='./file0\x00', &(0x7f0000000880), 0x21c6081, &(0x7f0000000980)={'trans=fd,', {'rfdno', 0x3d, r3}, 0x2c, {'wfdno', 0x3d, r3}, 0x2c, {[{@access_user}, {@uname={'uname', 0x3d, '/dev/net/tun\x00'}}], [{@fscontext={'fscontext', 0x3d, 'user_u'}}, {@fsmagic={'fsmagic', 0x3d, 0x800}}, {@subj_type={'subj_type', 0x3d, ')%^\xe6}*,:'}}, {@defcontext={'defcontext', 0x3d, 'sysadm_u'}}, {@smackfsfloor={'smackfsfloor', 0x3d, ' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}, {@obj_type={'obj_type', 0x3d, '},\xed'}}, {@obj_role={'obj_role', 0x3d, '\xaa\xaa\xaa\xaa\xaa'}}, {@obj_type={'obj_type', 0x3d, '/dev/net/tun\x00'}}, {@context={'context', 0x3d, 'unconfined_u'}}, {@smackfstransmute={'smackfstransmute', 0x3d, '[-.}\xa4]*'}}]}})
r6 = socket$inet6(0xa, 0x3, 0xff)
connect$inet6(r6, &(0x7f00000007c0)={0xa, 0xf3, 0x4, @mcast1, 0x5}, 0x1c)
r7 = dup2(r6, r6)
write$evdev(r7, &(0x7f0000000800)=[{{}, 0x1, 0x6, 0x3}, {{0x0, 0x2710}, 0x3a, 0xf, 0x2000081}], 0x30)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-syz_clone3-syz_extract_tcp_res-ioctl$EXT4_IOC_GETFSUUID-mount$9p_fd-socket$inet6-connect$inet6-dup2
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
syz_extract_tcp_res(&(0x7f0000000780), 0x80000001, 0x323)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)
mount$9p_fd(0x0, &(0x7f0000000840)='./file0\x00', &(0x7f0000000880), 0x21c6081, &(0x7f0000000980)={'trans=fd,', {'rfdno', 0x3d, r3}, 0x2c, {'wfdno', 0x3d, r3}, 0x2c, {[{@access_user}, {@uname={'uname', 0x3d, '/dev/net/tun\x00'}}], [{@fscontext={'fscontext', 0x3d, 'user_u'}}, {@fsmagic={'fsmagic', 0x3d, 0x800}}, {@subj_type={'subj_type', 0x3d, ')%^\xe6}*,:'}}, {@defcontext={'defcontext', 0x3d, 'sysadm_u'}}, {@smackfsfloor={'smackfsfloor', 0x3d, ' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}, {@obj_type={'obj_type', 0x3d, '},\xed'}}, {@obj_role={'obj_role', 0x3d, '\xaa\xaa\xaa\xaa\xaa'}}, {@obj_type={'obj_type', 0x3d, '/dev/net/tun\x00'}}, {@context={'context', 0x3d, 'unconfined_u'}}, {@smackfstransmute={'smackfstransmute', 0x3d, '[-.}\xa4]*'}}]}})
r6 = socket$inet6(0xa, 0x3, 0xff)
connect$inet6(r6, &(0x7f00000007c0)={0xa, 0xf3, 0x4, @mcast1, 0x5}, 0x1c)
dup2(r6, r6)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-syz_clone3-syz_extract_tcp_res-ioctl$EXT4_IOC_GETFSUUID-mount$9p_fd-socket$inet6-connect$inet6
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
syz_extract_tcp_res(&(0x7f0000000780), 0x80000001, 0x323)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)
mount$9p_fd(0x0, &(0x7f0000000840)='./file0\x00', &(0x7f0000000880), 0x21c6081, &(0x7f0000000980)={'trans=fd,', {'rfdno', 0x3d, r3}, 0x2c, {'wfdno', 0x3d, r3}, 0x2c, {[{@access_user}, {@uname={'uname', 0x3d, '/dev/net/tun\x00'}}], [{@fscontext={'fscontext', 0x3d, 'user_u'}}, {@fsmagic={'fsmagic', 0x3d, 0x800}}, {@subj_type={'subj_type', 0x3d, ')%^\xe6}*,:'}}, {@defcontext={'defcontext', 0x3d, 'sysadm_u'}}, {@smackfsfloor={'smackfsfloor', 0x3d, ' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}, {@obj_type={'obj_type', 0x3d, '},\xed'}}, {@obj_role={'obj_role', 0x3d, '\xaa\xaa\xaa\xaa\xaa'}}, {@obj_type={'obj_type', 0x3d, '/dev/net/tun\x00'}}, {@context={'context', 0x3d, 'unconfined_u'}}, {@smackfstransmute={'smackfstransmute', 0x3d, '[-.}\xa4]*'}}]}})
r6 = socket$inet6(0xa, 0x3, 0xff)
connect$inet6(r6, &(0x7f00000007c0)={0xa, 0xf3, 0x4, @mcast1, 0x5}, 0x1c)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-syz_clone3-syz_extract_tcp_res-ioctl$EXT4_IOC_GETFSUUID-mount$9p_fd-socket$inet6
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
syz_extract_tcp_res(&(0x7f0000000780), 0x80000001, 0x323)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)
mount$9p_fd(0x0, &(0x7f0000000840)='./file0\x00', &(0x7f0000000880), 0x21c6081, &(0x7f0000000980)={'trans=fd,', {'rfdno', 0x3d, r3}, 0x2c, {'wfdno', 0x3d, r3}, 0x2c, {[{@access_user}, {@uname={'uname', 0x3d, '/dev/net/tun\x00'}}], [{@fscontext={'fscontext', 0x3d, 'user_u'}}, {@fsmagic={'fsmagic', 0x3d, 0x800}}, {@subj_type={'subj_type', 0x3d, ')%^\xe6}*,:'}}, {@defcontext={'defcontext', 0x3d, 'sysadm_u'}}, {@smackfsfloor={'smackfsfloor', 0x3d, ' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}, {@obj_type={'obj_type', 0x3d, '},\xed'}}, {@obj_role={'obj_role', 0x3d, '\xaa\xaa\xaa\xaa\xaa'}}, {@obj_type={'obj_type', 0x3d, '/dev/net/tun\x00'}}, {@context={'context', 0x3d, 'unconfined_u'}}, {@smackfstransmute={'smackfstransmute', 0x3d, '[-.}\xa4]*'}}]}})
socket$inet6(0xa, 0x3, 0xff)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-syz_clone3-syz_extract_tcp_res-ioctl$EXT4_IOC_GETFSUUID-mount$9p_fd
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
syz_extract_tcp_res(&(0x7f0000000780), 0x80000001, 0x323)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)
mount$9p_fd(0x0, &(0x7f0000000840)='./file0\x00', &(0x7f0000000880), 0x21c6081, &(0x7f0000000980)={'trans=fd,', {'rfdno', 0x3d, r3}, 0x2c, {'wfdno', 0x3d, r3}, 0x2c, {[{@access_user}, {@uname={'uname', 0x3d, '/dev/net/tun\x00'}}], [{@fscontext={'fscontext', 0x3d, 'user_u'}}, {@fsmagic={'fsmagic', 0x3d, 0x800}}, {@subj_type={'subj_type', 0x3d, ')%^\xe6}*,:'}}, {@defcontext={'defcontext', 0x3d, 'sysadm_u'}}, {@smackfsfloor={'smackfsfloor', 0x3d, ' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}, {@obj_type={'obj_type', 0x3d, '},\xed'}}, {@obj_role={'obj_role', 0x3d, '\xaa\xaa\xaa\xaa\xaa'}}, {@obj_type={'obj_type', 0x3d, '/dev/net/tun\x00'}}, {@context={'context', 0x3d, 'unconfined_u'}}, {@smackfstransmute={'smackfstransmute', 0x3d, '[-.}\xa4]*'}}]}})

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-syz_clone3-syz_extract_tcp_res-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
syz_extract_tcp_res(&(0x7f0000000780), 0x80000001, 0x323)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-syz_clone3-syz_extract_tcp_res
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040), 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
syz_extract_tcp_res(&(0x7f0000000780), 0x80000001, 0x323)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-sendfile-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
ioctl$EXT4_IOC_GETFSUUID(0xffffffffffffffff, 0x40047452, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-syz_emit_ethernet-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
syz_emit_ethernet(0x22, &(0x7f0000000580)={@multicast, @local, @void, {@ipv4={0x800, @generic={{0x5, 0x4, 0x0, 0x0, 0x14, 0x0, 0x0, 0x1, 0x2, 0x0, @rand_addr=0x20202c8, @multicast1}}}}}, 0x0)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-syz_emit_ethernet-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
syz_emit_ethernet(0x6e, &(0x7f0000000180)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x1}, @local, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "d3ffff", 0x38, 0x3a, 0x0, @initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @mcast2, {[], @param_prob={0x2, 0x0, 0x0, 0x502, {0x0, 0x6, "508359", 0x0, 0x0, 0x0, @private1, @remote, [@hopopts={0x3b}]}}}}}}}, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-setsockopt$IPT_SO_SET_REPLACE-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r3, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r4 = socket$nl_route(0x10, 0x3, 0x0)
readv(r3, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r4, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
setsockopt$IPT_SO_SET_REPLACE(r2, 0x0, 0x40, &(0x7f0000000280)=@filter={'filter\x00', 0xe, 0x4, 0x298, 0xffffffff, 0x0, 0xd0, 0x168, 0xffffffff, 0xffffffff, 0xd0, 0x168, 0x200, 0xffffffff, 0x4, 0x0, {[{{@uncond, 0x0, 0xa8, 0xd0, 0x0, {}, [@common=@unspec=@time={{0x38}, {0x0, 0x7fffffff, 0x0, 0x1517f, 0xffffffff, 0xfe}}]}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xfffffffb}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}, {{@uncond, 0x0, 0x70, 0x98}, @common=@unspec=@STANDARD={0x28, '\x00', 0x0, 0xffffffff}}], {{'\x00', 0x0, 0x70, 0x98}, {0x28, '\x00', 0x0, 0xffffffff}}}}, 0x1000)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r5=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r5, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendmsg$nl_route-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
socket$inet_udp(0x2, 0x2, 0x0)
r2 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r2, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
r3 = socket$nl_route(0x10, 0x3, 0x0)
readv(r2, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendmsg$nl_route(r3, &(0x7f00000006c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000740)=ANY=[@ANYBLOB="280000001000010025bd7000f9dbdf2500000000", @ANYRES32=0x0, @ANYBLOB="158804000300000008001b"], 0x28}, 0x1, 0x0, 0x0, 0x40801}, 0x4000000)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r4=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r4, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-readv-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
socket$inet_udp(0x2, 0x2, 0x0)
r2 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r2, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
socket$nl_route(0x10, 0x3, 0x0)
readv(r2, &(0x7f0000000600)=[{0x0}, {&(0x7f0000000640)=""/69, 0x45}], 0x2)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r3=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r3, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-socket$nl_route-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
socket$inet_udp(0x2, 0x2, 0x0)
r2 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r2, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
socket$nl_route(0x10, 0x3, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r3=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r3, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-ioctl$TUNSETIFF-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
socket$inet_udp(0x2, 0x2, 0x0)
r2 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
ioctl$TUNSETIFF(r2, 0x400454ca, &(0x7f00000005c0)={'virt_wifi0\x00', 0xc1eb461a2917d087})
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r3=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r3, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-openat$tun-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
socket$inet_udp(0x2, 0x2, 0x0)
openat$tun(0xffffffffffffff9c, &(0x7f0000000200), 0x60280, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r2=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r2, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$inet_udp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
socket$inet_udp(0x2, 0x2, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r2=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r2, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r2=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r2, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
socket$pppl2tp(0x18, 0x1, 0x1)
socket$inet6_udp(0xa, 0x2, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r0=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r0, 0x40047452, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r1=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r1, 0x40047452, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(0xffffffffffffffff, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r0, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r1=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r1, 0x40047452, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, 0x0, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r1=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r1, 0x40047452, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r2=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r2, 0x40047452, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(0x0, 0x0)
ioctl$EXT4_IOC_GETFSUUID(0xffffffffffffffff, 0x40047452, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, 0x0, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(0xffffffffffffffff, 0x40047452, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
simplifying C reproducer
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r2=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r2, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
validation run: crashed=true
testing program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r2=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r2, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
validation run: crashed=true
testing program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-sendfile-syz_clone3-ioctl$EXT4_IOC_GETFSUUID
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x8, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02'}}}, 0x32)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000040)=0x3, 0xac5)
syz_clone3(&(0x7f0000000900)={0x23800000, &(0x7f0000000040)=<r2=>0xffffffffffffffff, 0x0, 0x0, {0x27}, 0x0, 0x0, 0x0, 0x0}, 0x58)
ioctl$EXT4_IOC_GETFSUUID(r2, 0x40047452, 0x0)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
validation run: crashed=true
reproducing took 26m44.719137887s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 net/l2tp/l2tp_ppp.c:156
Read of size 4 at addr ffff88810fb59400 by task syz.2.17/367

CPU: 0 PID: 367 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x100/0x140 mm/kasan/report.c:452
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 pppol2tp_sock_to_session+0x1a0/0x1b0 net/l2tp/l2tp_ppp.c:156
 pppol2tp_release+0x150/0x2b0 net/l2tp/l2tp_ppp.c:435
 __sock_release net/socket.c:597 [inline]
 sock_close+0xb8/0x200 net/socket.c:1287
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7c/0x24e0 kernel/exit.c:879
 do_group_exit+0x149/0x310 kernel/exit.c:993
 get_signal+0xfb1/0x1300 kernel/signal.c:2806
 arch_do_signal_or_restart+0xe7/0x11b0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:202
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:277
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f892f69a097
Code: Unable to access opcode bytes at RIP 0x7f892f69a06d.
RSP: 002b:00007ffcfab0f690 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 000055555db1b500 RCX: 00007f892f69a097
RDX: 00007ffcfab0f6d0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f892f76df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007f892f95bfac R14: 00007f892f95bfa0 R15: 00007f892f95bfa0

Allocated by task 366:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 __kmalloc+0x19f/0x330 mm/slub.c:4038
 kmalloc include/linux/slab.h:560 [inline]
 kzalloc include/linux/slab.h:667 [inline]
 l2tp_session_create+0x39/0xb60 net/l2tp/l2tp_core.c:1616
 pppol2tp_connect+0xbf5/0x1640 net/l2tp/l2tp_ppp.c:772
 __sys_connect_file net/socket.c:1867 [inline]
 __sys_connect+0x3ce/0x450 net/socket.c:1884
 __do_sys_connect net/socket.c:1894 [inline]
 __se_sys_connect net/socket.c:1891 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:1891
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 9:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1600 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
 slab_free mm/slub.c:3208 [inline]
 kfree+0xc0/0x270 mm/slub.c:4196
 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline]
 l2tp_session_put+0xb2/0x1a0 net/l2tp/l2tp_core.c:193
 l2tp_session_delete+0x3a9/0x4a0 net/l2tp/l2tp_core.c:1589
 l2tp_tunnel_closeall net/l2tp/l2tp_core.c:1235 [inline]
 l2tp_tunnel_del_work+0x180/0x3d0 net/l2tp/l2tp_core.c:1273
 process_one_work+0x6fd/0xbc0 kernel/workqueue.c:2301
 worker_thread+0xa8e/0x13c0 kernel/workqueue.c:2447
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff88810fb59400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 0 bytes inside of
 512-byte region [ffff88810fb59400, ffff88810fb59600)
The buggy address belongs to the page:
page:ffffea00043ed600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fb58
head:ffffea00043ed600 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 362, ts 27501443409, free_ts 27500193920
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x176/0x190 mm/page_alloc.c:2462
 get_page_from_freelist+0x225f/0x23f0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x29a/0x640 mm/page_alloc.c:5384
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2f8/0x4c0 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 __kmalloc_track_caller+0x1e4/0x310 mm/slub.c:4541
 __kmalloc_reserve net/core/skbuff.c:144 [inline]
 __alloc_skb+0xdc/0x520 net/core/skbuff.c:212
 alloc_skb include/linux/skbuff.h:1126 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1178 [inline]
 netlink_sendmsg+0x693/0xb70 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 __sys_sendto+0x467/0x620 net/socket.c:2007
 __do_sys_sendto net/socket.c:2019 [inline]
 __se_sys_sendto net/socket.c:2015 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2015
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 __free_pages_ok+0x80b/0x830 mm/page_alloc.c:1629
 free_the_page mm/page_alloc.c:5445 [inline]
 __free_pages+0xd8/0x390 mm/page_alloc.c:5454
 __free_slab+0xcf/0x190 mm/slub.c:1899
 free_slab mm/slub.c:1914 [inline]
 discard_slab mm/slub.c:1920 [inline]
 unfreeze_partials+0x150/0x180 mm/slub.c:2415
 put_cpu_partial+0xc1/0x180 mm/slub.c:2451
 __slab_free+0x2c9/0x3a0 mm/slub.c:3100
 do_slab_free mm/slub.c:3196 [inline]
 ___cache_free+0x10e/0x130 mm/slub.c:3215
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc_trace+0x155/0x2e0 mm/slub.c:2977
 kmalloc include/linux/slab.h:555 [inline]
 call_modprobe kernel/kmod.c:79 [inline]
 __request_module+0x2a7/0x910 kernel/kmod.c:170
 dev_load+0x5b/0xb0 net/core/dev_ioctl.c:341
 dev_ioctl+0x3c7/0xb80 net/core/dev_ioctl.c:405

Memory state around the buggy address:
 ffff88810fb59300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88810fb59380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88810fb59400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88810fb59480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810fb59500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
------------[ cut here ]------------
WARNING: CPU: 1 PID: 367 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0 net/l2tp/l2tp_ppp.c:156

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 net/l2tp/l2tp_ppp.c:156
Read of size 4 at addr ffff88810fb59400 by task syz.2.17/367

CPU: 0 PID: 367 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x100/0x140 mm/kasan/report.c:452
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 pppol2tp_sock_to_session+0x1a0/0x1b0 net/l2tp/l2tp_ppp.c:156
 pppol2tp_release+0x150/0x2b0 net/l2tp/l2tp_ppp.c:435
 __sock_release net/socket.c:597 [inline]
 sock_close+0xb8/0x200 net/socket.c:1287
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7c/0x24e0 kernel/exit.c:879
 do_group_exit+0x149/0x310 kernel/exit.c:993
 get_signal+0xfb1/0x1300 kernel/signal.c:2806
 arch_do_signal_or_restart+0xe7/0x11b0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:202
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:277
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f892f69a097
Code: Unable to access opcode bytes at RIP 0x7f892f69a06d.
RSP: 002b:00007ffcfab0f690 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 000055555db1b500 RCX: 00007f892f69a097
RDX: 00007ffcfab0f6d0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f892f76df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007f892f95bfac R14: 00007f892f95bfa0 R15: 00007f892f95bfa0

Allocated by task 366:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 __kmalloc+0x19f/0x330 mm/slub.c:4038
 kmalloc include/linux/slab.h:560 [inline]
 kzalloc include/linux/slab.h:667 [inline]
 l2tp_session_create+0x39/0xb60 net/l2tp/l2tp_core.c:1616
 pppol2tp_connect+0xbf5/0x1640 net/l2tp/l2tp_ppp.c:772
 __sys_connect_file net/socket.c:1867 [inline]
 __sys_connect+0x3ce/0x450 net/socket.c:1884
 __do_sys_connect net/socket.c:1894 [inline]
 __se_sys_connect net/socket.c:1891 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:1891
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 9:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1600 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
 slab_free mm/slub.c:3208 [inline]
 kfree+0xc0/0x270 mm/slub.c:4196
 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline]
 l2tp_session_put+0xb2/0x1a0 net/l2tp/l2tp_core.c:193
 l2tp_session_delete+0x3a9/0x4a0 net/l2tp/l2tp_core.c:1589
 l2tp_tunnel_closeall net/l2tp/l2tp_core.c:1235 [inline]
 l2tp_tunnel_del_work+0x180/0x3d0 net/l2tp/l2tp_core.c:1273
 process_one_work+0x6fd/0xbc0 kernel/workqueue.c:2301
 worker_thread+0xa8e/0x13c0 kernel/workqueue.c:2447
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff88810fb59400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 0 bytes inside of
 512-byte region [ffff88810fb59400, ffff88810fb59600)
The buggy address belongs to the page:
page:ffffea00043ed600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fb58
head:ffffea00043ed600 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 362, ts 27501443409, free_ts 27500193920
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x176/0x190 mm/page_alloc.c:2462
 get_page_from_freelist+0x225f/0x23f0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x29a/0x640 mm/page_alloc.c:5384
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2f8/0x4c0 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 __kmalloc_track_caller+0x1e4/0x310 mm/slub.c:4541
 __kmalloc_reserve net/core/skbuff.c:144 [inline]
 __alloc_skb+0xdc/0x520 net/core/skbuff.c:212
 alloc_skb include/linux/skbuff.h:1126 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1178 [inline]
 netlink_sendmsg+0x693/0xb70 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 __sys_sendto+0x467/0x620 net/socket.c:2007
 __do_sys_sendto net/socket.c:2019 [inline]
 __se_sys_sendto net/socket.c:2015 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2015
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 __free_pages_ok+0x80b/0x830 mm/page_alloc.c:1629
 free_the_page mm/page_alloc.c:5445 [inline]
 __free_pages+0xd8/0x390 mm/page_alloc.c:5454
 __free_slab+0xcf/0x190 mm/slub.c:1899
 free_slab mm/slub.c:1914 [inline]
 discard_slab mm/slub.c:1920 [inline]
 unfreeze_partials+0x150/0x180 mm/slub.c:2415
 put_cpu_partial+0xc1/0x180 mm/slub.c:2451
 __slab_free+0x2c9/0x3a0 mm/slub.c:3100
 do_slab_free mm/slub.c:3196 [inline]
 ___cache_free+0x10e/0x130 mm/slub.c:3215
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc_trace+0x155/0x2e0 mm/slub.c:2977
 kmalloc include/linux/slab.h:555 [inline]
 call_modprobe kernel/kmod.c:79 [inline]
 __request_module+0x2a7/0x910 kernel/kmod.c:170
 dev_load+0x5b/0xb0 net/core/dev_ioctl.c:341
 dev_ioctl+0x3c7/0xb80 net/core/dev_ioctl.c:405

Memory state around the buggy address:
 ffff88810fb59300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88810fb59380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88810fb59400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88810fb59480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810fb59500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
------------[ cut here ]------------
WARNING: CPU: 1 PID: 367 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0 net/l2tp/l2tp_ppp.c:156