Extracting prog: 24.649873726s
Minimizing prog: 18m15.1233224s
Simplifying prog options: 0s
Extracting C: 26.905604886s
Simplifying C: 5m34.544227272s


extracting reproducer from 36 programs
first checking the prog from the crash report
single: executing 1 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}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
socket$inet6_udp(0xa, 0x2, 0x0) (async)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) (async)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e) (async)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]}) (async)
bind$pptp(0xffffffffffffffff, 0x0, 0x0) (async)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8) (async)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff) (async)
openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0) (async)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1) (async)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b") (async)
close(r2) (async)

program crashed: KASAN: use-after-free Read in l2tp_tunnel_del_work
single: successfully extracted reproducer
found reproducer with 26 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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
socket$inet6_udp(0xa, 0x2, 0x0) (async)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) (async)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e) (async)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]}) (async)
bind$pptp(0xffffffffffffffff, 0x0, 0x0) (async)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8) (async)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff) (async)
openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0) (async)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1) (async)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b") (async)

program crashed: KASAN: use-after-free Write in l2tp_session_delete
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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
socket$inet6_udp(0xa, 0x2, 0x0) (async)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) (async)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e) (async)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]}) (async)
bind$pptp(0xffffffffffffffff, 0x0, 0x0) (async)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8) (async)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff) (async)
openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0) (async)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1) (async)

program crashed: KASAN: use-after-free Write in l2tp_session_delete
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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
socket$inet6_udp(0xa, 0x2, 0x0) (async)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) (async)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e) (async)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]}) (async)
bind$pptp(0xffffffffffffffff, 0x0, 0x0) (async)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8) (async)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff) (async)
openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0) (async)

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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
socket$inet6_udp(0xa, 0x2, 0x0) (async)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) (async)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e) (async)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]}) (async)
bind$pptp(0xffffffffffffffff, 0x0, 0x0) (async)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8) (async)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff) (async)

program crashed: KASAN: use-after-free Read in l2tp_tunnel_del_work
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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
socket$inet6_udp(0xa, 0x2, 0x0) (async)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) (async)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e) (async)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]}) (async)
bind$pptp(0xffffffffffffffff, 0x0, 0x0) (async)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8) (async)

program crashed: KASAN: use-after-free Write in l2tp_session_delete
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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
socket$inet6_udp(0xa, 0x2, 0x0) (async)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) (async)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e) (async)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]}) (async)
bind$pptp(0xffffffffffffffff, 0x0, 0x0) (async)

program crashed: KASAN: use-after-free Write in l2tp_session_delete
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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
socket$inet6_udp(0xa, 0x2, 0x0) (async)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) (async)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e) (async)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]}) (async)

program crashed: KASAN: use-after-free Read in l2tp_tunnel_get_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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
socket$inet6_udp(0xa, 0x2, 0x0) (async)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) (async)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e) (async)

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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
socket$inet6_udp(0xa, 0x2, 0x0) (async)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) (async)
socket$pppl2tp(0x18, 0x1, 0x1) (async)

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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
socket$inet6_udp(0xa, 0x2, 0x0) (async)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) (async)

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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp-socket$inet6_udp
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)
socket$inet6_udp(0xa, 0x2, 0x0) (async)

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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close-socket$pppl2tp
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)
socket$pppl2tp(0x18, 0x1, 0x1) (async)

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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse-close
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")
close(r2)

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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN-syz_mount_image$fuse
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)
syz_mount_image$fuse(&(0x7f0000000080), &(0x7f00000000c0)='./file0\x00', 0x1a2841, &(0x7f0000000100)=ANY=[@ANYBLOB='fd=', @ANYRESHEX, @ANYBLOB=',rootmode=00000000000000000010000,user_id=', @ANYRESDEC, @ANYBLOB=',group_id=', @ANYRESDEC=0xee00, @ANYBLOB=',max_read=0x0000000000000005,allow_other,defau`t_permissions,allow_other,allow_other,max_read=0x0000000000000008,allow_other,mask=^MAY_EXEC,hash,\x00'], 0x1, 0x0, &(0x7f0000000240)="7e722aa5a80ff65b5b2c0358099e929f03c9969d13726ac5422dcdc34b75280fa9793890bfaa273e012b52e64206f18c288e4237bb572efcef0325e68a06ec74f6887478aa5e34eb8bab6843d3aad4fb358b4a1f4f1e401885173904d3f441e51f6f5b00937d388e1a2398622d8d6d266dc15d8119584d6b9768335ebe023e3f69705d51425ab0b6a635d1a41bac5ccdcb50a25a399ea291c39d293b5303974797d6cef4e1449de1b0137579796ff739eeec8f8c357db02e1153d4a526620bf3d3ca444d5befde3dc2ab943d42bc5b65ae85f2baab3539af51f432eeb0f39b910996eaf0a7cbe9ddb37b")

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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp-ioctl$PPPIOCATTCHAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 0x0)
ioctl$PPPIOCATTCHAN(r3, 0x40047438, &(0x7f0000000340)=0x1)

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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2-openat$ppp
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)
openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0001, 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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals-syz_genetlink_get_family_id$tipc2
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)
syz_genetlink_get_family_id$tipc2(0x0, 0xffffffffffffffff)

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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp-fcntl$addseals
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 0x0)
fcntl$addseals(0xffffffffffffffff, 0x409, 0x8)

program crashed: KASAN: use-after-free Write in rcu_segcblist_enqueue
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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN-bind$pptp
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})
bind$pptp(0xffffffffffffffff, 0x0, 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$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})

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$pppl2tp-socket$pppl2tp-connect$pppl2tp
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
r2 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r2, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0x40}}, 0x2, 0x9800, 0x0, 0x4}}, 0x2e)

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$pppl2tp-socket$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
socket$pppl2tp(0x18, 0x1, 0x1)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})

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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})

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-ioctl$BTRFS_IOC_QUOTA_RESCAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
socket$inet6_udp(0xa, 0x2, 0x0)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})

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-ioctl$BTRFS_IOC_QUOTA_RESCAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})

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-ioctl$BTRFS_IOC_QUOTA_RESCAN
detailed listing:
executing program 0:
r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(0xffffffffffffffff, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r0, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(0xffffffffffffffff, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})

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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, 0x0, 0x0)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, &(0x7f0000000380)={0x0, 0x2, [0x4, 0x4, 0x5, 0x7, 0x711b, 0x6]})

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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
program crashed: KASAN: use-after-free Write in pppol2tp_release
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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
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: 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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
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:false NetDevices:false 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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
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:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false 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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
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:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false 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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
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:none 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:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
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:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
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:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
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:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true 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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
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:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true 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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, 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:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true 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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, 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:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true 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$pppl2tp-ioctl$BTRFS_IOC_QUOTA_RESCAN
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$BTRFS_IOC_QUOTA_RESCAN(r0, 0x4040942c, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
validation run: crashed=true
reproducing took 26m26.050084674s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1667 [inline]
BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:169 [inline]
BUG: KASAN: use-after-free in mutex_lock+0x8e/0x1c0 kernel/locking/mutex.c:288
Write of size 8 at addr ffff88811f2eb550 by task syz.2.17/372

CPU: 0 PID: 372 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x10f/0x150 mm/kasan/report.c:444
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1667 [inline]
 __mutex_trylock_fast kernel/locking/mutex.c:169 [inline]
 mutex_lock+0x8e/0x1c0 kernel/locking/mutex.c:288
 pppol2tp_release+0x178/0x2b0 net/l2tp/l2tp_ppp.c:442
 __sock_release net/socket.c:649 [inline]
 sock_close+0xb8/0x200 net/socket.c:1336
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f9045c19159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc061a9918 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffc061a9a00 RCX: 00007f9045c19159
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00000000000058cd R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b32f20000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9045ea0fac R14: 00007f9045ea0fa8 R15: 00007f9045ea0fa0
 </TASK>

Allocated by task 372:
 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:433 [inline]
 ____kasan_kmalloc mm/kasan/common.c:512 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:521
 kasan_kmalloc include/linux/kasan.h:227 [inline]
 __kmalloc+0x13d/0x2c0 mm/slub.c:4436
 kmalloc include/linux/slab.h:624 [inline]
 kzalloc include/linux/slab.h:750 [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:1923 [inline]
 __sys_connect+0x3cb/0x450 net/socket.c:1940
 __do_sys_connect net/socket.c:1950 [inline]
 __se_sys_connect net/socket.c:1947 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:1947
 x64_sys_call+0x7c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:43
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

Freed by task 372:
 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:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754
 slab_free mm/slub.c:3526 [inline]
 kfree+0xc4/0x270 mm/slub.c:4588
 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline]
 l2tp_session_put+0xaf/0x1a0 net/l2tp/l2tp_core.c:193
 l2tp_session_delete+0x3a9/0x4a0 net/l2tp/l2tp_core.c:1589
 pppol2tp_release+0x169/0x2b0 net/l2tp/l2tp_ppp.c:439
 __sock_release net/socket.c:649 [inline]
 sock_close+0xb8/0x200 net/socket.c:1336
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff88811f2eb400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 336 bytes inside of
 512-byte region [ffff88811f2eb400, ffff88811f2eb600)
The buggy address belongs to the page:
page:ffffea00047cba00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11f2e8
head:ffffea00047cba00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00
raw: 0000000000000000 0000000080100010 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 368, ts 22746107227, free_ts 22118400109
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613
 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487
 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1937 [inline]
 new_slab+0xa0/0x4d0 mm/slub.c:2000
 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033
 __slab_alloc+0x49/0x90 mm/slub.c:3120
 slab_alloc_node mm/slub.c:3211 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 __kmalloc_track_caller+0x169/0x2c0 mm/slub.c:4954
 kmalloc_reserve net/core/skbuff.c:357 [inline]
 __alloc_skb+0x210/0x730 net/core/skbuff.c:428
 alloc_skb include/linux/skbuff.h:1183 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 netlink_ack+0x35c/0xb10 net/netlink/af_netlink.c:2455
 netlink_rcv_skb+0x267/0x430 net/netlink/af_netlink.c:2526
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5680
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x879/0xb80 net/netlink/af_netlink.c:1923
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x46d/0x620 net/socket.c:2063
 __do_sys_sendto net/socket.c:2075 [inline]
 __se_sys_sendto net/socket.c:2071 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2071
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1474 [inline]
 free_pcp_prepare mm/page_alloc.c:1546 [inline]
 free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536
 free_unref_page+0xae/0x540 mm/page_alloc.c:3618
 free_the_page mm/page_alloc.c:805 [inline]
 __free_pages+0x6c/0x100 mm/page_alloc.c:5900
 __vunmap+0x801/0x980 mm/vmalloc.c:2660
 __vfree mm/vmalloc.c:2709 [inline]
 vfree+0x8b/0xc0 mm/vmalloc.c:2740
 kcov_put kernel/kcov.c:417 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:519
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xb70/0x29a0 kernel/exit.c:890
 do_group_exit+0x149/0x310 kernel/exit.c:1004
 get_signal+0x64f/0x1430 kernel/signal.c:2908
 arch_do_signal_or_restart+0xe2/0x1100 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307

Memory state around the buggy address:
 ffff88811f2eb400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811f2eb480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811f2eb500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff88811f2eb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811f2eb600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1667 [inline]
BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:169 [inline]
BUG: KASAN: use-after-free in mutex_lock+0x8e/0x1c0 kernel/locking/mutex.c:288
Write of size 8 at addr ffff88811f2eb550 by task syz.2.17/372

CPU: 0 PID: 372 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x10f/0x150 mm/kasan/report.c:444
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1667 [inline]
 __mutex_trylock_fast kernel/locking/mutex.c:169 [inline]
 mutex_lock+0x8e/0x1c0 kernel/locking/mutex.c:288
 pppol2tp_release+0x178/0x2b0 net/l2tp/l2tp_ppp.c:442
 __sock_release net/socket.c:649 [inline]
 sock_close+0xb8/0x200 net/socket.c:1336
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f9045c19159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc061a9918 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffc061a9a00 RCX: 00007f9045c19159
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00000000000058cd R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b32f20000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9045ea0fac R14: 00007f9045ea0fa8 R15: 00007f9045ea0fa0
 </TASK>

Allocated by task 372:
 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:433 [inline]
 ____kasan_kmalloc mm/kasan/common.c:512 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:521
 kasan_kmalloc include/linux/kasan.h:227 [inline]
 __kmalloc+0x13d/0x2c0 mm/slub.c:4436
 kmalloc include/linux/slab.h:624 [inline]
 kzalloc include/linux/slab.h:750 [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:1923 [inline]
 __sys_connect+0x3cb/0x450 net/socket.c:1940
 __do_sys_connect net/socket.c:1950 [inline]
 __se_sys_connect net/socket.c:1947 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:1947
 x64_sys_call+0x7c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:43
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

Freed by task 372:
 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:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754
 slab_free mm/slub.c:3526 [inline]
 kfree+0xc4/0x270 mm/slub.c:4588
 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline]
 l2tp_session_put+0xaf/0x1a0 net/l2tp/l2tp_core.c:193
 l2tp_session_delete+0x3a9/0x4a0 net/l2tp/l2tp_core.c:1589
 pppol2tp_release+0x169/0x2b0 net/l2tp/l2tp_ppp.c:439
 __sock_release net/socket.c:649 [inline]
 sock_close+0xb8/0x200 net/socket.c:1336
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff88811f2eb400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 336 bytes inside of
 512-byte region [ffff88811f2eb400, ffff88811f2eb600)
The buggy address belongs to the page:
page:ffffea00047cba00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11f2e8
head:ffffea00047cba00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00
raw: 0000000000000000 0000000080100010 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 368, ts 22746107227, free_ts 22118400109
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613
 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487
 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1937 [inline]
 new_slab+0xa0/0x4d0 mm/slub.c:2000
 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033
 __slab_alloc+0x49/0x90 mm/slub.c:3120
 slab_alloc_node mm/slub.c:3211 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 __kmalloc_track_caller+0x169/0x2c0 mm/slub.c:4954
 kmalloc_reserve net/core/skbuff.c:357 [inline]
 __alloc_skb+0x210/0x730 net/core/skbuff.c:428
 alloc_skb include/linux/skbuff.h:1183 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 netlink_ack+0x35c/0xb10 net/netlink/af_netlink.c:2455
 netlink_rcv_skb+0x267/0x430 net/netlink/af_netlink.c:2526
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5680
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x879/0xb80 net/netlink/af_netlink.c:1923
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x46d/0x620 net/socket.c:2063
 __do_sys_sendto net/socket.c:2075 [inline]
 __se_sys_sendto net/socket.c:2071 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2071
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1474 [inline]
 free_pcp_prepare mm/page_alloc.c:1546 [inline]
 free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536
 free_unref_page+0xae/0x540 mm/page_alloc.c:3618
 free_the_page mm/page_alloc.c:805 [inline]
 __free_pages+0x6c/0x100 mm/page_alloc.c:5900
 __vunmap+0x801/0x980 mm/vmalloc.c:2660
 __vfree mm/vmalloc.c:2709 [inline]
 vfree+0x8b/0xc0 mm/vmalloc.c:2740
 kcov_put kernel/kcov.c:417 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:519
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xb70/0x29a0 kernel/exit.c:890
 do_group_exit+0x149/0x310 kernel/exit.c:1004
 get_signal+0x64f/0x1430 kernel/signal.c:2908
 arch_do_signal_or_restart+0xe2/0x1100 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307

Memory state around the buggy address:
 ffff88811f2eb400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811f2eb480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811f2eb500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff88811f2eb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811f2eb600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================