Extracting prog: 21m19.369881782s
Minimizing prog: 52m41.302290528s
Simplifying prog options: 13m23.828122985s
Extracting C: 5m13.306492173s
Simplifying C: 0s


extracting reproducer from 44 programs
testing a last program of every proc
single: executing 9 programs separately with timeout 6m0s
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true 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$nl_rdma-sendmsg$netlink-socket$inet6_udp-setsockopt$IP6T_SO_SET_REPLACE-bpf$PROG_LOAD_XDP-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = syz_init_net_socket$nl_rdma(0x10, 0x3, 0x10)
sendmsg$netlink(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000000)=[{&(0x7f0000000080)=ANY=[@ANYBLOB="e80100002e000100000000000000000004001980d20109"], 0x1e8}], 0x1, 0x0, 0x0, 0x84}, 0x300)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
setsockopt$IP6T_SO_SET_REPLACE(r1, 0x29, 0x40, &(0x7f0000000000)=@security={'security\x00', 0x44, 0x4, 0x4f8, 0xffffffff, 0x330, 0x0, 0x330, 0xffffffff, 0xffffffff, 0x428, 0x428, 0x428, 0xffffffff, 0x4, 0x0, {[{{@ipv6={@ipv4={'\x00', '\xff\xff', @local}, @private2, [0xffffffff, 0xffffff00, 0x0, 0xd0f5bcfa7c76e88e], [0xffffff00, 0xffffffff, 0xff000000, 0xffffffff], 'bond0\x00', 'wg0\x00', {}, {}, 0x87, 0x6, 0x5, 0x61}, 0x203, 0x210, 0x238, 0x8502, {}, [@common=@rt={{0x138}, {0x7, [0x77], 0x4, 0x1, 0x5, [@mcast1, @private0={0xfc, 0x0, '\x00', 0x1}, @private2={0xfc, 0x2, '\x00', 0x1}, @mcast2, @rand_addr=' \x01\x00', @local, @mcast1, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01', @ipv4={'\x00', '\xff\xff', @local}, @ipv4={'\x00', '\xff\xff', @multicast1}, @initdev={0xfe, 0x88, '\x00', 0x1, 0x0}, @private0={0xfc, 0x0, '\x00', 0x1}, @mcast1, @remote, @mcast1, @private1], 0x3}}, @common=@unspec=@cluster={{0x30}, {0x800, 0x7, 0x7, 0x1}}]}, @common=@inet=@SET1={0x28, 'SET\x00', 0x1, {{0x0, 0x8, 0x3}, {0x0, 0x24, 0x1}}}}, {{@uncond, 0x0, 0xd0, 0xf8, 0x0, {0x0, 0x11}, [@common=@eui64={{0x28}}]}, @common=@unspec=@AUDIT={0x28, 'AUDIT\x00', 0x0, {0x3}}}, {{@ipv6={@mcast2, @private2={0xfc, 0x2, '\x00', 0x1}, [0xffffffff, 0x0, 0xff, 0xffffffff], [0x0, 0xff, 0xffffffff, 0xffffffff], 'bond0\x00', 'nicvf0\x00', {0xff}, {0xff}, 0x29, 0xb6, 0x5}, 0x0, 0xd0, 0xf8, 0x0, {}, [@common=@inet=@socket2={{0x28}, 0x1}]}, @common=@unspec=@NFQUEUE0={0x28, 'NFQUEUE\x00', 0x0, {0x5b2f}}}], {{'\x00', 0x0, 0xa8, 0xd0}, {0x28}}}}, 0x558)
r2 = bpf$PROG_LOAD_XDP(0x5, &(0x7f0000000480)={0x6, 0x3, &(0x7f0000000040)=ANY=[@ANYRES64=r0], &(0x7f0000000180)='syzkaller\x00', 0x0, 0x0, 0x0, 0x1e00, 0x2c}, 0x94)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000080)={&(0x7f0000000000)=@newlink={0x34, 0x10, 0x801, 0x0, 0x0, {0x0, 0x0, 0x0, 0x0, 0x14080, 0x10000}, [@IFLA_XDP={0xc, 0x2b, 0x0, 0x1, [@IFLA_XDP_FD={0x8, 0x1, r2}]}, @IFLA_GROUP={0x8}]}, 0x34}, 0x1, 0x0, 0x0, 0x20000040}, 0x0)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_genetlink_get_family_id$nl80211-ioctl$sock_SIOCGIFINDEX_80211-ioctl$sock_SIOCGIFINDEX_80211-sendmsg$NL80211_CMD_UPDATE_FT_IES-socket$nl_netfilter-socket$nl_netfilter-socket$igmp-setsockopt$IP_VS_SO_SET_STARTDAEMON-setsockopt$IP_VS_SO_SET_STARTDAEMON-socketpair$tipc-sendmmsg$inet-socket$nl_generic-sendmsg$NL80211_CMD_NEW_INTERFACE-sendmsg$IPSET_CMD_CREATE
detailed listing:
executing program 0:
r0 = syz_genetlink_get_family_id$nl80211(&(0x7f0000000080), 0xffffffffffffffff)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, &(0x7f0000000100)={'wlan1\x00'}) (async)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, &(0x7f0000000100)={'wlan1\x00', <r1=>0x0})
sendmsg$NL80211_CMD_UPDATE_FT_IES(0xffffffffffffffff, &(0x7f00000002c0)={&(0x7f0000000040)={0x10, 0x0, 0x0, 0x80000}, 0xc, &(0x7f0000000140)={&(0x7f0000000300)=ANY=[@ANYBLOB="c8000000753cad22e9579e8353d54775fac7bb89bdc912b46ebeea554f5c974d65263aeeef54d3592eb449a6fdc1e3c4d0602bec20d5960e256d7e20d9629e7ecffd155091e738c4fc0fabdcc27482d18030b3510692a27f1bb7bc6a077c1a5fc261a67823d0471bfa6ab3c8d41c61a9e7694229bc925eb8bcb5ec94eadf563f9801b71ee8cf3599105b1547fcc15fede7ee84129b6ec12d6ef294f41ae416a506ec8714e74296836643b9b89246228f01c7799abed13e54fde4976736453fcdefdd7121a5a6b3827f77f977f5d8de7a", @ANYRES16=r0, @ANYBLOB="000827bd7000fcdbdf256000000008000300", @ANYRES32=r1, @ANYBLOB="0600b10000040000a3002a006512ffffffffffff0802110000010802110000012503010e09264c010004ef24572a2a9120f5f23fe4462a9dcf19cbfd331a57b2289ab6791ee23bf43948ceba093d883d9e9f0a1e5d60ffb587dbaab65d235c07b46dd220a4c2ccc53ddc1dbd8fa46ba239fd9201082286d7e0066b988172060303030303036512791c988d85450802110000000802110000018c10440f5f04e186837f2e306d55d5b24c9200"], 0xc8}, 0x1, 0x0, 0x0, 0x4028004}, 0xb700cc677cd30625)
socket$nl_netfilter(0x10, 0x3, 0xc) (async)
r2 = socket$nl_netfilter(0x10, 0x3, 0xc)
r3 = socket$igmp(0x2, 0x3, 0x2)
setsockopt$IP_VS_SO_SET_STARTDAEMON(r3, 0x0, 0x48b, &(0x7f0000001880)={0x0, 'wg1\x00', 0x2}, 0x18) (async)
setsockopt$IP_VS_SO_SET_STARTDAEMON(r3, 0x0, 0x48b, &(0x7f0000001880)={0x0, 'wg1\x00', 0x2}, 0x18)
socketpair$tipc(0x1e, 0x1, 0x0, &(0x7f0000000180)={<r4=>0xffffffffffffffff})
sendmmsg$inet(r4, &(0x7f00000086c0)=[{{&(0x7f00000000c0)={0x2, 0x4e22, @rand_addr=0x64010102}, 0x10, 0x0}}], 0x1, 0x4800)
r5 = socket$nl_generic(0x10, 0x3, 0x10)
sendmsg$NL80211_CMD_NEW_INTERFACE(r5, &(0x7f0000000280)={&(0x7f00000001c0)={0x10, 0x0, 0x0, 0x10000000}, 0xc, &(0x7f0000000240)={&(0x7f0000000200)={0x30, r0, 0x2, 0x70bd28, 0x25dfdbfe, {{}, {@val={0x8, 0x1, 0x5b}, @void, @val={0xc, 0x99, {0x1, 0x41}}}}, [@NL80211_ATTR_IFTYPE={0x8, 0x5, 0xc}]}, 0x30}, 0x1, 0x0, 0x0, 0x4004}, 0x41)
sendmsg$IPSET_CMD_CREATE(r2, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000000)={&(0x7f0000000e00)=ANY=[], 0x58}, 0x1, 0x0, 0x0, 0x40040}, 0x880)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$PROG_LOAD_XDP-socket$nl_netfilter-sendmsg$NFT_BATCH-sendmsg$NFT_BATCH-getsockname$packet-bpf$PROG_LOAD_XDP-write$cgroup_subtree-write$cgroup_subtree-bpf$BPF_PROG_TEST_RUN
detailed listing:
executing program 0:
bpf$PROG_LOAD_XDP(0x5, &(0x7f0000000300)={0x6, 0x1c, &(0x7f0000000680)=ANY=[@ANYBLOB="1800000002000000000000000000000095"], 0x0}, 0x94)
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000080)={&(0x7f0000000240)=ANY=[@ANYBLOB="140000001000010000000000000000000500000a28000000000a030000000000000000000a00000708000240000000020900010073797a31000000002c000000030a010100000000000000000a0000070900010073797a31000000000900030073797a320000000014000000110001"], 0x7c}, 0x1, 0x0, 0x0, 0x4000}, 0x0)
sendmsg$NFT_BATCH(r0, &(0x7f0000009b40)={0x0, 0x0, &(0x7f0000009b00)={&(0x7f0000002100)=ANY=[@ANYBLOB="140000001000010000000000000000000500000a5c000000090a010400000000000000000a0000040900010073797a310000000008000540000000040900020073797a310000000008000a40fffffffc200011800e000100636f6e6e6c696d69740000000c00028008000140fffff27414000000110001"], 0x84}, 0x1, 0x0, 0x0, 0x4000850}, 0x40)
getsockname$packet(0xffffffffffffffff, &(0x7f0000000040)={0x11, 0x0, <r1=>0x0, 0x1, 0x0, 0x6, @dev}, &(0x7f0000000100)=0x14)
r2 = bpf$PROG_LOAD_XDP(0x5, &(0x7f0000000200)={0x6, 0x3, &(0x7f0000000680)=ANY=[], &(0x7f00000002c0)='syzkaller\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', r1}, 0x94)
write$cgroup_subtree(0xffffffffffffffff, &(0x7f0000000000)=ANY=[@ANYBLOB="8fedcb7902009875f37538e486dd6317ce62667f2c00fe80000000000000875a65969ff57b00000000000000000000000000ac1414aa88"], 0xfdef)
write$cgroup_subtree(0xffffffffffffffff, &(0x7f0000000000)=ANY=[@ANYBLOB="8fed007907001175f37538e486dd6317ce2200"], 0xcfa4)
bpf$BPF_PROG_TEST_RUN(0xa, &(0x7f0000000600)={r2, 0x5, 0xb68, 0x0, &(0x7f0000000000)='%', 0x0, 0xd01, 0x88be, 0x0, 0x0, 0x0, 0x0, 0x2}, 0x48)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-socket$nl_netfilter-accept4-sendmsg$IPSET_CMD_CREATE
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB="60000000031401002cbd7000f9dbdf250900020073797a31000000000800410072786500140033006c6f00000000000000000000000000000900020001000000000000000800410072786500140033006970766c616e300000000000000000008b969da831adfd"], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
accept4(r1, &(0x7f00000000c0)=@pppol2tpv3in6={0x18, 0x1, {0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @dev}}}, &(0x7f0000000180)=0x80, 0x80800)
sendmsg$IPSET_CMD_CREATE(r1, &(0x7f0000001080)={0x0, 0x0, &(0x7f0000000080)={&(0x7f0000000000)={0x70, 0x2, 0x6, 0x1, 0x6000000, 0x0, {0x0, 0x0, 0x4}, [@IPSET_ATTR_TYPENAME={0xe, 0x3, 'bitmap:ip\x00'}, @IPSET_ATTR_REVISION={0x5}, @IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_DATA={0x20, 0x7, 0x0, 0x1, [@IPSET_ATTR_NETMASK={0x5, 0x14, 0x20}, @IPSET_ATTR_IP={0xc, 0x1, 0x0, 0x1, @IPSET_ATTR_IPADDR_IPV4={0x8, 0x1, 0x1, 0x0, @empty=0x80ffffff}}, @IPSET_ATTR_CIDR={0x5}]}, @IPSET_ATTR_FAMILY={0x5, 0x5, 0x2}, @IPSET_ATTR_TYPENAME={0x10, 0x3, 'bitmap:port\x00'}]}, 0x70}}, 0x0)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
single: successfully extracted reproducer
found reproducer with 5 syscalls
minimizing guilty program
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-socket$nl_netfilter-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB="60000000031401002cbd7000f9dbdf250900020073797a31000000000800410072786500140033006c6f00000000000000000000000000000900020001000000000000000800410072786500140033006970766c616e300000000000000000008b969da831adfd"], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
accept4(r1, &(0x7f00000000c0)=@pppol2tpv3in6={0x18, 0x1, {0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @dev}}}, &(0x7f0000000180)=0x80, 0x80800)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-socket$nl_netfilter
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB="60000000031401002cbd7000f9dbdf250900020073797a31000000000800410072786500140033006c6f00000000000000000000000000000900020001000000000000000800410072786500140033006970766c616e300000000000000000008b969da831adfd"], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
socket$nl_netfilter(0x10, 0x3, 0xc)

program crashed: lost connection to test machine
suppressed program crash: lost connection to test machine
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB="60000000031401002cbd7000f9dbdf250900020073797a31000000000800410072786500140033006c6f00000000000000000000000000000900020001000000000000000800410072786500140033006970766c616e300000000000000000008b969da831adfd"], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
accept4(0xffffffffffffffff, &(0x7f00000000c0)=@pppol2tpv3in6={0x18, 0x1, {0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @dev}}}, &(0x7f0000000180)=0x80, 0x80800)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-accept4
detailed listing:
executing program 0:
socket$nl_rdma(0x10, 0x3, 0x14)
accept4(0xffffffffffffffff, &(0x7f00000000c0)=@pppol2tpv3in6={0x18, 0x1, {0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @dev}}}, &(0x7f0000000180)=0x80, 0x80800)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
sendmsg$RDMA_NLDEV_CMD_NEWLINK(0xffffffffffffffff, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB="60000000031401002cbd7000f9dbdf250900020073797a31000000000800410072786500140033006c6f00000000000000000000000000000900020001000000000000000800410072786500140033006970766c616e300000000000000000008b969da831adfd"], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
accept4(0xffffffffffffffff, &(0x7f00000000c0)=@pppol2tpv3in6={0x18, 0x1, {0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @dev}}}, &(0x7f0000000180)=0x80, 0x80800)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, 0x0, 0x810)
accept4(0xffffffffffffffff, &(0x7f00000000c0)=@pppol2tpv3in6={0x18, 0x1, {0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @dev}}}, &(0x7f0000000180)=0x80, 0x80800)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x40004}, 0x810)
accept4(0xffffffffffffffff, &(0x7f00000000c0)=@pppol2tpv3in6={0x18, 0x1, {0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @dev}}}, &(0x7f0000000180)=0x80, 0x80800)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={0x0, 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
accept4(0xffffffffffffffff, &(0x7f00000000c0)=@pppol2tpv3in6={0x18, 0x1, {0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @dev}}}, &(0x7f0000000180)=0x80, 0x80800)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
accept4(0xffffffffffffffff, &(0x7f00000000c0)=@pppol2tpv3in6={0x18, 0x1, {0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @dev}}}, &(0x7f0000000180)=0x80, 0x80800)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB="60000000031401002cbd7000f9dbdf250900020073797a31000000000800410072786500140033006c6f00000000000000000000000000000900020001000000000000000800410072786500140033006970766c616e300000000000000000008b969da831adfd"], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
accept4(0xffffffffffffffff, 0x0, &(0x7f0000000180), 0x80800)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB="60000000031401002cbd7000f9dbdf250900020073797a31000000000800410072786500140033006c6f00000000000000000000000000000900020001000000000000000800410072786500140033006970766c616e300000000000000000008b969da831adfd"], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
accept4(0xffffffffffffffff, 0x0, 0x0, 0x80800)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
extracting C reproducer
testing compiled C program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB="60000000031401002cbd7000f9dbdf250900020073797a31000000000800410072786500140033006c6f00000000000000000000000000000900020001000000000000000800410072786500140033006970766c616e300000000000000000008b969da831adfd"], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
accept4(0xffffffffffffffff, 0x0, 0x0, 0x80800)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
extracting C reproducer
testing compiled C program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB="60000000031401002cbd7000f9dbdf250900020073797a31000000000800410072786500140033006c6f00000000000000000000000000000900020001000000000000000800410072786500140033006970766c616e300000000000000000008b969da831adfd"], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
accept4(0xffffffffffffffff, 0x0, 0x0, 0x80800)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB="60000000031401002cbd7000f9dbdf250900020073797a31000000000800410072786500140033006c6f00000000000000000000000000000900020001000000000000000800410072786500140033006970766c616e300000000000000000008b969da831adfd"], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
accept4(0xffffffffffffffff, 0x0, 0x0, 0x80800)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
validation run: crashed=true
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB="60000000031401002cbd7000f9dbdf250900020073797a31000000000800410072786500140033006c6f00000000000000000000000000000900020001000000000000000800410072786500140033006970766c616e300000000000000000008b969da831adfd"], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
accept4(0xffffffffffffffff, 0x0, 0x0, 0x80800)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
validation run: crashed=true
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_NEWLINK-accept4
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000080)=ANY=[@ANYBLOB="60000000031401002cbd7000f9dbdf250900020073797a31000000000800410072786500140033006c6f00000000000000000000000000000900020001000000000000000800410072786500140033006970766c616e300000000000000000008b969da831adfd"], 0x60}, 0x1, 0x0, 0x0, 0x40004}, 0x810)
accept4(0xffffffffffffffff, 0x0, 0x0, 0x80800)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
validation run: crashed=true
reproducing took 1h43m8.431618848s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in __ethtool_get_link_ksettings+0x5e/0x170 net/ethtool/ioctl.c:443
Read of size 8 at addr ffff88807963e2e8 by task kworker/0:6/6101

CPU: 0 UID: 0 PID: 6101 Comm: kworker/0:6 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events smc_ib_port_event_work
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xba/0x230 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 __ethtool_get_link_ksettings+0x5e/0x170 net/ethtool/ioctl.c:443
 ib_get_eth_speed+0x180/0x7f0 drivers/infiniband/core/verbs.c:1999
 rxe_query_port+0x93/0x3d0 drivers/infiniband/sw/rxe/rxe_verbs.c:62
 __ib_query_port drivers/infiniband/core/device.c:2148 [inline]
 ib_query_port+0x170/0x830 drivers/infiniband/core/device.c:2180
 smc_ib_remember_port_attr net/smc/smc_ib.c:364 [inline]
 smc_ib_port_event_work+0x15a/0x940 net/smc/smc_ib.c:388
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
 kthread+0x726/0x8b0 kernel/kthread.c:463
 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

Allocated by task 10798:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5657 [inline]
 __kvmalloc_node_noprof+0x59a/0x8d0 mm/slub.c:7140
 alloc_netdev_mqs+0xa6/0x11b0 net/core/dev.c:12012
 rtnl_create_link+0x31f/0xd70 net/core/rtnetlink.c:3648
 rtnl_newlink_create+0x277/0xb70 net/core/rtnetlink.c:3830
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x1666/0x1be0 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 __sys_sendto+0x709/0x7a0 net/socket.c:2206
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2209
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 6126:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2540 [inline]
 slab_free mm/slub.c:6674 [inline]
 kfree+0x1be/0x650 mm/slub.c:6882
 device_release+0x9e/0x1d0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x228/0x560 lib/kobject.c:737
 netdev_run_todo+0xc75/0xde0 net/core/dev.c:11713
 default_device_exit_batch+0x986/0xa00 net/core/dev.c:13052
 ops_exit_list net/core/net_namespace.c:205 [inline]
 ops_undo_list+0x52b/0x940 net/core/net_namespace.c:252
 cleanup_net+0x4df/0x7b0 net/core/net_namespace.c:696
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
 kthread+0x726/0x8b0 kernel/kthread.c:463
 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

The buggy address belongs to the object at ffff88807963e000
 which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 744 bytes inside of
 freed 4096-byte region [ffff88807963e000, ffff88807963f000)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x79638
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88803044f841
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88813fe30500 ffffea0001f58400 dead000000000002
raw: 0000000000000000 0000000000040004 00000000f5000000 ffff88803044f841
head: 00fff00000000040 ffff88813fe30500 ffffea0001f58400 dead000000000002
head: 0000000000000000 0000000000040004 00000000f5000000 ffff88803044f841
head: 00fff00000000003 ffffea0001e58e01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5957, tgid 5957 (syz-executor), ts 141497650890, free_ts 141489987042
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
 prep_new_page mm/page_alloc.c:1892 [inline]
 get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486
 alloc_slab_page mm/slub.c:3075 [inline]
 allocate_slab+0x86/0x3a0 mm/slub.c:3248
 new_slab mm/slub.c:3302 [inline]
 ___slab_alloc+0xd82/0x1760 mm/slub.c:4656
 __slab_alloc+0x65/0x100 mm/slub.c:4779
 __slab_alloc_node mm/slub.c:4855 [inline]
 slab_alloc_node mm/slub.c:5251 [inline]
 __do_kmalloc_node mm/slub.c:5656 [inline]
 __kmalloc_node_track_caller_noprof+0x5b7/0x7f0 mm/slub.c:5768
 kmemdup_noprof+0x2b/0x70 mm/util.c:138
 kmemdup_noprof include/linux/fortify-string.h:765 [inline]
 __addrconf_sysctl_register+0xa7/0x4d0 net/ipv6/addrconf.c:7305
 addrconf_sysctl_register+0x168/0x1c0 net/ipv6/addrconf.c:7371
 ipv6_add_dev+0xd26/0x13a0 net/ipv6/addrconf.c:460
 addrconf_notify+0x771/0x1050 net/ipv6/addrconf.c:3650
 notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2281 [inline]
 call_netdevice_notifiers net/core/dev.c:2295 [inline]
 register_netdevice+0x171a/0x1cd0 net/core/dev.c:11444
 veth_newlink+0x67b/0xb70 drivers/net/veth.c:1889
page last free pid 5966 tgid 5966 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1433 [inline]
 __free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
 discard_slab mm/slub.c:3346 [inline]
 __put_partials+0x146/0x170 mm/slub.c:3886
 __slab_free+0x294/0x320 mm/slub.c:5956
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4953 [inline]
 slab_alloc_node mm/slub.c:5263 [inline]
 kmem_cache_alloc_node_noprof+0x427/0x6f0 mm/slub.c:5315
 __alloc_skb+0x1d7/0x390 net/core/skbuff.c:679
 alloc_skb include/linux/skbuff.h:1383 [inline]
 nlmsg_new include/net/netlink.h:1055 [inline]
 netlink_ack+0x146/0xa50 net/netlink/af_netlink.c:2487
 netlink_rcv_skb+0x2b6/0x4b0 net/netlink/af_netlink.c:2556
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 __sys_sendto+0x709/0x7a0 net/socket.c:2206
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2209
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88807963e180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807963e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807963e280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                          ^
 ffff88807963e300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807963e380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in __ethtool_get_link_ksettings+0x5e/0x170 net/ethtool/ioctl.c:443
Read of size 8 at addr ffff88807963e2e8 by task kworker/0:6/6101

CPU: 0 UID: 0 PID: 6101 Comm: kworker/0:6 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events smc_ib_port_event_work
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xba/0x230 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 __ethtool_get_link_ksettings+0x5e/0x170 net/ethtool/ioctl.c:443
 ib_get_eth_speed+0x180/0x7f0 drivers/infiniband/core/verbs.c:1999
 rxe_query_port+0x93/0x3d0 drivers/infiniband/sw/rxe/rxe_verbs.c:62
 __ib_query_port drivers/infiniband/core/device.c:2148 [inline]
 ib_query_port+0x170/0x830 drivers/infiniband/core/device.c:2180
 smc_ib_remember_port_attr net/smc/smc_ib.c:364 [inline]
 smc_ib_port_event_work+0x15a/0x940 net/smc/smc_ib.c:388
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
 kthread+0x726/0x8b0 kernel/kthread.c:463
 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

Allocated by task 10798:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5657 [inline]
 __kvmalloc_node_noprof+0x59a/0x8d0 mm/slub.c:7140
 alloc_netdev_mqs+0xa6/0x11b0 net/core/dev.c:12012
 rtnl_create_link+0x31f/0xd70 net/core/rtnetlink.c:3648
 rtnl_newlink_create+0x277/0xb70 net/core/rtnetlink.c:3830
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x1666/0x1be0 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 __sys_sendto+0x709/0x7a0 net/socket.c:2206
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2209
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 6126:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2540 [inline]
 slab_free mm/slub.c:6674 [inline]
 kfree+0x1be/0x650 mm/slub.c:6882
 device_release+0x9e/0x1d0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x228/0x560 lib/kobject.c:737
 netdev_run_todo+0xc75/0xde0 net/core/dev.c:11713
 default_device_exit_batch+0x986/0xa00 net/core/dev.c:13052
 ops_exit_list net/core/net_namespace.c:205 [inline]
 ops_undo_list+0x52b/0x940 net/core/net_namespace.c:252
 cleanup_net+0x4df/0x7b0 net/core/net_namespace.c:696
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
 kthread+0x726/0x8b0 kernel/kthread.c:463
 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

The buggy address belongs to the object at ffff88807963e000
 which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 744 bytes inside of
 freed 4096-byte region [ffff88807963e000, ffff88807963f000)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x79638
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88803044f841
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88813fe30500 ffffea0001f58400 dead000000000002
raw: 0000000000000000 0000000000040004 00000000f5000000 ffff88803044f841
head: 00fff00000000040 ffff88813fe30500 ffffea0001f58400 dead000000000002
head: 0000000000000000 0000000000040004 00000000f5000000 ffff88803044f841
head: 00fff00000000003 ffffea0001e58e01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5957, tgid 5957 (syz-executor), ts 141497650890, free_ts 141489987042
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
 prep_new_page mm/page_alloc.c:1892 [inline]
 get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486
 alloc_slab_page mm/slub.c:3075 [inline]
 allocate_slab+0x86/0x3a0 mm/slub.c:3248
 new_slab mm/slub.c:3302 [inline]
 ___slab_alloc+0xd82/0x1760 mm/slub.c:4656
 __slab_alloc+0x65/0x100 mm/slub.c:4779
 __slab_alloc_node mm/slub.c:4855 [inline]
 slab_alloc_node mm/slub.c:5251 [inline]
 __do_kmalloc_node mm/slub.c:5656 [inline]
 __kmalloc_node_track_caller_noprof+0x5b7/0x7f0 mm/slub.c:5768
 kmemdup_noprof+0x2b/0x70 mm/util.c:138
 kmemdup_noprof include/linux/fortify-string.h:765 [inline]
 __addrconf_sysctl_register+0xa7/0x4d0 net/ipv6/addrconf.c:7305
 addrconf_sysctl_register+0x168/0x1c0 net/ipv6/addrconf.c:7371
 ipv6_add_dev+0xd26/0x13a0 net/ipv6/addrconf.c:460
 addrconf_notify+0x771/0x1050 net/ipv6/addrconf.c:3650
 notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2281 [inline]
 call_netdevice_notifiers net/core/dev.c:2295 [inline]
 register_netdevice+0x171a/0x1cd0 net/core/dev.c:11444
 veth_newlink+0x67b/0xb70 drivers/net/veth.c:1889
page last free pid 5966 tgid 5966 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1433 [inline]
 __free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
 discard_slab mm/slub.c:3346 [inline]
 __put_partials+0x146/0x170 mm/slub.c:3886
 __slab_free+0x294/0x320 mm/slub.c:5956
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4953 [inline]
 slab_alloc_node mm/slub.c:5263 [inline]
 kmem_cache_alloc_node_noprof+0x427/0x6f0 mm/slub.c:5315
 __alloc_skb+0x1d7/0x390 net/core/skbuff.c:679
 alloc_skb include/linux/skbuff.h:1383 [inline]
 nlmsg_new include/net/netlink.h:1055 [inline]
 netlink_ack+0x146/0xa50 net/netlink/af_netlink.c:2487
 netlink_rcv_skb+0x2b6/0x4b0 net/netlink/af_netlink.c:2556
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 __sys_sendto+0x709/0x7a0 net/socket.c:2206
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2209
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88807963e180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807963e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807963e280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                          ^
 ffff88807963e300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807963e380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================