Extracting prog: 4m6.049613771s
Minimizing prog: 14m2.521153362s
Simplifying prog options: 6m10.430107167s
Extracting C: 2m13.881468379s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$kcm-sendmsg$nl_route-socket$inet6-bpf$MAP_UPDATE_BATCH-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x10)
r2 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r2, 0x10e, 0x4, 0x0, 0x0)
r3 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$kcm(0xffffffffffffffff, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000200)=[{0x0}, {0x0}], 0x2}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000540)={0x0}}, 0x0)
socket$inet6(0xa, 0x2, 0x0)
bpf$MAP_UPDATE_BATCH(0x1a, &(0x7f0000000200)={0x0, 0x0, 0x0, 0x0, 0x2}, 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8b30, &(0x7f0000000040)={'wlan0\x00'})

program crashed: lost connection to test machine
ignore low priority crash: lost connection to test machine
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$kcm-sendmsg$nl_route-socket$inet6-bpf$MAP_UPDATE_BATCH-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x10)
r2 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r2, 0x10e, 0x4, 0x0, 0x0)
r3 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$kcm(0xffffffffffffffff, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000200)=[{0x0}, {0x0}], 0x2}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000540)={0x0}}, 0x0)
socket$inet6(0xa, 0x2, 0x0)
bpf$MAP_UPDATE_BATCH(0x1a, &(0x7f0000000200)={0x0, 0x0, 0x0, 0x0, 0x2}, 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8b30, &(0x7f0000000040)={'wlan0\x00'})

program crashed: KASAN: slab-use-after-free Read in udp_tunnel_nic_device_sync_work
single: successfully extracted reproducer
found reproducer with 16 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$kcm-sendmsg$nl_route-socket$inet6-bpf$MAP_UPDATE_BATCH
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x10)
r2 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r2, 0x10e, 0x4, 0x0, 0x0)
r3 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$kcm(0xffffffffffffffff, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000200)=[{0x0}, {0x0}], 0x2}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000540)={0x0}}, 0x0)
socket$inet6(0xa, 0x2, 0x0)
bpf$MAP_UPDATE_BATCH(0x1a, &(0x7f0000000200)={0x0, 0x0, 0x0, 0x0, 0x2}, 0x2)

program crashed: lost connection to test machine
ignore low priority crash: lost connection to test machine
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$kcm-sendmsg$nl_route-socket$inet6-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x10)
r2 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r2, 0x10e, 0x4, 0x0, 0x0)
r3 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$kcm(0xffffffffffffffff, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000200)=[{0x0}, {0x0}], 0x2}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000540)={0x0}}, 0x0)
socket$inet6(0xa, 0x2, 0x0)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8b30, &(0x7f0000000040)={'wlan0\x00'})

program crashed: lost connection to test machine
ignore low priority crash: lost connection to test machine
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$kcm-sendmsg$nl_route-bpf$MAP_UPDATE_BATCH-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x10)
r2 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r2, 0x10e, 0x4, 0x0, 0x0)
r3 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$kcm(0xffffffffffffffff, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000200)=[{0x0}, {0x0}], 0x2}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000540)={0x0}}, 0x0)
bpf$MAP_UPDATE_BATCH(0x1a, &(0x7f0000000200)={0x0, 0x0, 0x0, 0x0, 0x2}, 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8b30, &(0x7f0000000040)={'wlan0\x00'})

program crashed: lost connection to test machine
ignore low priority crash: lost connection to test machine
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$kcm-socket$inet6-bpf$MAP_UPDATE_BATCH-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
socket$netlink(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x10)
r1 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r1, 0x10e, 0x4, 0x0, 0x0)
r2 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r2, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$DEVLINK_CMD_RATE_NEW(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r2, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$kcm(0xffffffffffffffff, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000200)=[{0x0}, {0x0}], 0x2}, 0x0)
socket$inet6(0xa, 0x2, 0x0)
bpf$MAP_UPDATE_BATCH(0x1a, &(0x7f0000000200)={0x0, 0x0, 0x0, 0x0, 0x2}, 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8b30, &(0x7f0000000040)={'wlan0\x00'})

program crashed: lost connection to test machine
ignore low priority crash: lost connection to test machine
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$nl_route-socket$inet6-bpf$MAP_UPDATE_BATCH-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x10)
r2 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r2, 0x10e, 0x4, 0x0, 0x0)
r3 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000540)={0x0}}, 0x0)
socket$inet6(0xa, 0x2, 0x0)
bpf$MAP_UPDATE_BATCH(0x1a, &(0x7f0000000200)={0x0, 0x0, 0x0, 0x0, 0x2}, 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8b30, &(0x7f0000000040)={'wlan0\x00'})

program crashed: KASAN: slab-use-after-free Read in udp_tunnel_nic_device_sync_work
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$nl_route-socket$inet6-bpf$MAP_UPDATE_BATCH-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x10)
r2 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r2, 0x10e, 0x4, 0x0, 0x0)
r3 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000540)={0x0}}, 0x0)
socket$inet6(0xa, 0x2, 0x0)
bpf$MAP_UPDATE_BATCH(0x1a, &(0x7f0000000200)={0x0, 0x0, 0x0, 0x0, 0x2}, 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8b30, &(0x7f0000000040)={'wlan0\x00'})

minimization failed with failed to copy syz-execprog to VM: scp failed: failed to run ["scp" "-P" "2126" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "-O" "/syzkaller/syzkaller/current/bin/linux_amd64/syz-execprog" "root@localhost:/syz-execprog"]: exit status 1
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$nl_route-socket$inet6-bpf$MAP_UPDATE_BATCH-ioctl$sock_SIOCGIFINDEX_80211
program crashed: WARNING: ODEBUG bug in udp_tunnel_nic_netdevice_event
a never seen crash title: WARNING: ODEBUG bug in udp_tunnel_nic_netdevice_event, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$nl_route-socket$inet6-bpf$MAP_UPDATE_BATCH-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x10)
r2 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r2, 0x10e, 0x4, 0x0, 0x0)
r3 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000540)={0x0}}, 0x0)
socket$inet6(0xa, 0x2, 0x0)
bpf$MAP_UPDATE_BATCH(0x1a, &(0x7f0000000200)={0x0, 0x0, 0x0, 0x0, 0x2}, 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8b30, &(0x7f0000000040)={'wlan0\x00'})

program crashed: lost connection to test machine
ignore low priority crash: lost connection to test machine
testing program (duration=6m0s, {Threaded:true 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$nl_route-socket$inet6-bpf$MAP_UPDATE_BATCH-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x10)
r2 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r2, 0x10e, 0x4, 0x0, 0x0)
r3 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000540)={0x0}}, 0x0)
socket$inet6(0xa, 0x2, 0x0)
bpf$MAP_UPDATE_BATCH(0x1a, &(0x7f0000000200)={0x0, 0x0, 0x0, 0x0, 0x2}, 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8b30, &(0x7f0000000040)={'wlan0\x00'})

program crashed: lost connection to test machine
ignore low priority crash: lost connection to test machine
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$nl_route-socket$inet6-bpf$MAP_UPDATE_BATCH-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x10)
r2 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r2, 0x10e, 0x4, 0x0, 0x0)
r3 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000540)={0x0}}, 0x0)
socket$inet6(0xa, 0x2, 0x0)
bpf$MAP_UPDATE_BATCH(0x1a, &(0x7f0000000200)={0x0, 0x0, 0x0, 0x0, 0x2}, 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8b30, &(0x7f0000000040)={'wlan0\x00'})

program crashed: KASAN: slab-use-after-free Read in udp_tunnel_nic_device_sync_work
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$nl_route-socket$inet6-bpf$MAP_UPDATE_BATCH-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x10)
r2 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r2, 0x10e, 0x4, 0x0, 0x0)
r3 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000540)={0x0}}, 0x0)
socket$inet6(0xa, 0x2, 0x0)
bpf$MAP_UPDATE_BATCH(0x1a, &(0x7f0000000200)={0x0, 0x0, 0x0, 0x0, 0x2}, 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8b30, &(0x7f0000000040)={'wlan0\x00'})

program crashed: KASAN: slab-use-after-free Read in udp_tunnel_nic_device_sync_work
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-socket$nl_route-socket$nl_generic-socket$nl_route-socket$netlink-socket$netlink-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-syz_genetlink_get_family_id$devlink-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$DEVLINK_CMD_RATE_NEW-sendmsg$nl_route-socket$inet6-bpf$MAP_UPDATE_BATCH-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x10)
r2 = socket$netlink(0x10, 0x3, 0x4)
setsockopt$netlink_NETLINK_BROADCAST_ERROR(r2, 0x10e, 0x4, 0x0, 0x0)
r3 = syz_genetlink_get_family_id$devlink(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$DEVLINK_CMD_RATE_NEW(r1, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000300)={0x34, r3, 0x1, 0x0, 0x25dfdbfb, {0x25}, [@handle=@nsim={{0xe}, {0xf, 0x2, {'netdevsim', 0x0}}}]}, 0x34}, 0x1, 0x0, 0x0, 0x41}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000540)={0x0}}, 0x0)
socket$inet6(0xa, 0x2, 0x0)
bpf$MAP_UPDATE_BATCH(0x1a, &(0x7f0000000200)={0x0, 0x0, 0x0, 0x0, 0x2}, 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8b30, &(0x7f0000000040)={'wlan0\x00'})

program crashed: KASAN: slab-use-after-free Read in udp_tunnel_nic_device_sync_work
validation run: crashed=true
reproducing took 38m4.109036217s
repro crashed as (corrupted=false):
netdevsim netdevsim4 eth3: set [1, 0] type 2 family 0 port 6081 - 0
==================================================================
BUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/mutex.c:625 [inline]
BUG: KASAN: slab-use-after-free in __mutex_lock+0x15a/0x1550 kernel/locking/mutex.c:820
Read of size 8 at addr ffff88803414caa8 by task kworker/u4:8/1062

CPU: 0 UID: 0 PID: 1062 Comm: kworker/u4:8 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: udp_tunnel_nic udp_tunnel_nic_device_sync_work
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 __mutex_lock_common kernel/locking/mutex.c:625 [inline]
 __mutex_lock+0x15a/0x1550 kernel/locking/mutex.c:820
 udp_tunnel_nic_device_sync_work+0x39/0xa10 net/ipv4/udp_tunnel_nic.c:737
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 5874:
 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:5296 [inline]
 __kmalloc_noprof+0x35c/0x760 mm/slub.c:5308
 kmalloc_noprof include/linux/slab.h:954 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 udp_tunnel_nic_alloc net/ipv4/udp_tunnel_nic.c:756 [inline]
 udp_tunnel_nic_register net/ipv4/udp_tunnel_nic.c:833 [inline]
 udp_tunnel_nic_netdevice_event+0x4c3/0x17d0 net/ipv4/udp_tunnel_nic.c:931
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 register_netdevice+0x18c9/0x1ec0 net/core/dev.c:11461
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:1069 [inline]
 nsim_create+0xbed/0x1160 drivers/net/netdevsim/netdev.c:1151
 __nsim_dev_port_add+0x857/0xd30 drivers/net/netdevsim/dev.c:1509
 nsim_dev_port_add_all+0x37/0xf0 drivers/net/netdevsim/dev.c:1570
 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1622 [inline]
 nsim_dev_reload_up+0x45f/0x7c0 drivers/net/netdevsim/dev.c:1058
 devlink_reload+0x4f8/0x8c0 net/devlink/dev.c:475
 devlink_nl_reload_doit+0xaaa/0xc80 net/devlink/dev.c:585
 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2555
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
 __sys_sendmsg net/socket.c:2784 [inline]
 __do_sys_sendmsg net/socket.c:2789 [inline]
 __se_sys_sendmsg net/socket.c:2787 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5875:
 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:2689 [inline]
 slab_free mm/slub.c:6251 [inline]
 kfree+0x1c5/0x640 mm/slub.c:6566
 udp_tunnel_nic_free net/ipv4/udp_tunnel_nic.c:785 [inline]
 udp_tunnel_nic_unregister net/ipv4/udp_tunnel_nic.c:910 [inline]
 udp_tunnel_nic_netdevice_event+0x11ed/0x17d0 net/ipv4/udp_tunnel_nic.c:942
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 unregister_netdevice_many_notify+0x17a5/0x22c0 net/core/dev.c:12421
 unregister_netdevice_many net/core/dev.c:12484 [inline]
 unregister_netdevice_queue+0x31f/0x360 net/core/dev.c:12294
 unregister_netdevice include/linux/netdevice.h:3444 [inline]
 nsim_destroy+0x26d/0x7f0 drivers/net/netdevsim/netdev.c:1193
 __nsim_dev_port_del+0x14f/0x200 drivers/net/netdevsim/dev.c:1547
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1561 [inline]
 nsim_dev_reload_destroy+0x288/0x490 drivers/net/netdevsim/dev.c:1785
 nsim_dev_reload_down+0x8a/0xc0 drivers/net/netdevsim/dev.c:1038
 devlink_reload+0x1eb/0x8c0 net/devlink/dev.c:462
 devlink_nl_reload_doit+0xaaa/0xc80 net/devlink/dev.c:585
 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2555
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
 __sys_sendmsg net/socket.c:2784 [inline]
 __do_sys_sendmsg net/socket.c:2789 [inline]
 __se_sys_sendmsg net/socket.c:2787 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 insert_work+0x3d/0x330 kernel/workqueue.c:2226
 __queue_work+0xbba/0x1040 kernel/workqueue.c:2397
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2444
 queue_work include/linux/workqueue.h:698 [inline]
 udp_tunnel_nic_device_sync net/ipv4/udp_tunnel_nic.c:307 [inline]
 __udp_tunnel_nic_add_port+0xb71/0xd60 net/ipv4/udp_tunnel_nic.c:523
 udp_tunnel_nic_add_port include/net/udp_tunnel.h:402 [inline]
 udp_tunnel_push_rx_port+0x186/0x210 net/ipv4/udp_tunnel_core.c:112
 geneve_offload_rx_ports+0xc7/0x150 drivers/net/geneve.c:1657
 geneve_netdevice_event+0x6a/0x80 drivers/net/geneve.c:-1
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers+0x90/0xd0 net/core/dev.c:2301
 udp_tunnel_get_rx_info include/net/udp_tunnel.h:469 [inline]
 udp_tunnel_nic_register net/ipv4/udp_tunnel_nic.c:855 [inline]
 udp_tunnel_nic_netdevice_event+0xdef/0x17d0 net/ipv4/udp_tunnel_nic.c:931
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 register_netdevice+0x18c9/0x1ec0 net/core/dev.c:11461
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:1069 [inline]
 nsim_create+0xbed/0x1160 drivers/net/netdevsim/netdev.c:1151
 __nsim_dev_port_add+0x857/0xd30 drivers/net/netdevsim/dev.c:1509
 nsim_dev_port_add_all+0x37/0xf0 drivers/net/netdevsim/dev.c:1570
 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1622 [inline]
 nsim_dev_reload_up+0x45f/0x7c0 drivers/net/netdevsim/dev.c:1058
 devlink_reload+0x4f8/0x8c0 net/devlink/dev.c:475
 devlink_nl_reload_doit+0xaaa/0xc80 net/devlink/dev.c:585
 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2555
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
 __sys_sendmsg net/socket.c:2784 [inline]
 __do_sys_sendmsg net/socket.c:2789 [inline]
 __se_sys_sendmsg net/socket.c:2787 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Second to last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 insert_work+0x3d/0x330 kernel/workqueue.c:2226
 __queue_work+0xcef/0x1040 kernel/workqueue.c:2393
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2444
 queue_work include/linux/workqueue.h:698 [inline]
 udp_tunnel_nic_device_sync net/ipv4/udp_tunnel_nic.c:307 [inline]
 __udp_tunnel_nic_add_port+0xb71/0xd60 net/ipv4/udp_tunnel_nic.c:523
 udp_tunnel_nic_add_port include/net/udp_tunnel.h:402 [inline]
 udp_tunnel_push_rx_port+0x186/0x210 net/ipv4/udp_tunnel_core.c:112
 geneve_offload_rx_ports+0xc7/0x150 drivers/net/geneve.c:1657
 geneve_netdevice_event+0x6a/0x80 drivers/net/geneve.c:-1
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers+0x90/0xd0 net/core/dev.c:2301
 udp_tunnel_get_rx_info include/net/udp_tunnel.h:469 [inline]
 udp_tunnel_nic_register net/ipv4/udp_tunnel_nic.c:855 [inline]
 udp_tunnel_nic_netdevice_event+0xdef/0x17d0 net/ipv4/udp_tunnel_nic.c:931
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 register_netdevice+0x18c9/0x1ec0 net/core/dev.c:11461
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:1069 [inline]
 nsim_create+0xbed/0x1160 drivers/net/netdevsim/netdev.c:1151
 __nsim_dev_port_add+0x857/0xd30 drivers/net/netdevsim/dev.c:1509
 nsim_dev_port_add_all+0x37/0xf0 drivers/net/netdevsim/dev.c:1570
 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1622 [inline]
 nsim_dev_reload_up+0x45f/0x7c0 drivers/net/netdevsim/dev.c:1058
 devlink_reload+0x4f8/0x8c0 net/devlink/dev.c:475
 devlink_nl_reload_doit+0xaaa/0xc80 net/devlink/dev.c:585
 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2555
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
 __sys_sendmsg net/socket.c:2784 [inline]
 __do_sys_sendmsg net/socket.c:2789 [inline]
 __se_sys_sendmsg net/socket.c:2787 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88803414ca00
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 168 bytes inside of
 freed 256-byte region [ffff88803414ca00, ffff88803414cb00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3414c
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000000 ffff88801ac41b40 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800080008 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5480, tgid 5480 (syz-executor), ts 327907347868, free_ts 327882108557
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x2593/0x2610 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 alloc_slab_page mm/slub.c:3278 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3467
 new_slab mm/slub.c:3525 [inline]
 refill_objects+0x339/0x3d0 mm/slub.c:7272
 refill_sheaf mm/slub.c:2816 [inline]
 __pcs_replace_empty_main+0x321/0x720 mm/slub.c:4652
 alloc_from_pcs mm/slub.c:4750 [inline]
 slab_alloc_node mm/slub.c:4884 [inline]
 __kmalloc_cache_noprof+0x392/0x660 mm/slub.c:5415
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 ____ip_mc_inc_group+0x518/0xdd0 net/ipv4/igmp.c:1549
 __ip_mc_inc_group net/ipv4/igmp.c:1587 [inline]
 ip_mc_inc_group net/ipv4/igmp.c:1593 [inline]
 ip_mc_up+0x115/0x2e0 net/ipv4/igmp.c:1894
 inetdev_event+0xff6/0x1610 net/ipv4/devinet.c:1630
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 __dev_notify_flags+0x1a9/0x310 net/core/dev.c:9797
 netif_change_flags+0xe8/0x1a0 net/core/dev.c:9826
 do_setlink+0xfa5/0x45a0 net/core/rtnetlink.c:3181
 rtnl_changelink net/core/rtnetlink.c:3800 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3973 [inline]
 rtnl_newlink+0x15ad/0x1bb0 net/core/rtnetlink.c:4110
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6997
page last free pid 15 tgid 15 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xc1c/0xd30 mm/page_alloc.c:2938
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x7cd/0x1070 kernel/rcu/tree.c:2869
 handle_softirqs+0x22a/0x840 kernel/softirq.c:622
 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1076
 smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Memory state around the buggy address:
 ffff88803414c980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803414ca00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88803414ca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff88803414cb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803414cb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

final repro crashed as (corrupted=false):
netdevsim netdevsim4 eth3: set [1, 0] type 2 family 0 port 6081 - 0
==================================================================
BUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/mutex.c:625 [inline]
BUG: KASAN: slab-use-after-free in __mutex_lock+0x15a/0x1550 kernel/locking/mutex.c:820
Read of size 8 at addr ffff88803414caa8 by task kworker/u4:8/1062

CPU: 0 UID: 0 PID: 1062 Comm: kworker/u4:8 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: udp_tunnel_nic udp_tunnel_nic_device_sync_work
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 __mutex_lock_common kernel/locking/mutex.c:625 [inline]
 __mutex_lock+0x15a/0x1550 kernel/locking/mutex.c:820
 udp_tunnel_nic_device_sync_work+0x39/0xa10 net/ipv4/udp_tunnel_nic.c:737
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 5874:
 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:5296 [inline]
 __kmalloc_noprof+0x35c/0x760 mm/slub.c:5308
 kmalloc_noprof include/linux/slab.h:954 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 udp_tunnel_nic_alloc net/ipv4/udp_tunnel_nic.c:756 [inline]
 udp_tunnel_nic_register net/ipv4/udp_tunnel_nic.c:833 [inline]
 udp_tunnel_nic_netdevice_event+0x4c3/0x17d0 net/ipv4/udp_tunnel_nic.c:931
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 register_netdevice+0x18c9/0x1ec0 net/core/dev.c:11461
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:1069 [inline]
 nsim_create+0xbed/0x1160 drivers/net/netdevsim/netdev.c:1151
 __nsim_dev_port_add+0x857/0xd30 drivers/net/netdevsim/dev.c:1509
 nsim_dev_port_add_all+0x37/0xf0 drivers/net/netdevsim/dev.c:1570
 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1622 [inline]
 nsim_dev_reload_up+0x45f/0x7c0 drivers/net/netdevsim/dev.c:1058
 devlink_reload+0x4f8/0x8c0 net/devlink/dev.c:475
 devlink_nl_reload_doit+0xaaa/0xc80 net/devlink/dev.c:585
 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2555
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
 __sys_sendmsg net/socket.c:2784 [inline]
 __do_sys_sendmsg net/socket.c:2789 [inline]
 __se_sys_sendmsg net/socket.c:2787 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5875:
 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:2689 [inline]
 slab_free mm/slub.c:6251 [inline]
 kfree+0x1c5/0x640 mm/slub.c:6566
 udp_tunnel_nic_free net/ipv4/udp_tunnel_nic.c:785 [inline]
 udp_tunnel_nic_unregister net/ipv4/udp_tunnel_nic.c:910 [inline]
 udp_tunnel_nic_netdevice_event+0x11ed/0x17d0 net/ipv4/udp_tunnel_nic.c:942
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 unregister_netdevice_many_notify+0x17a5/0x22c0 net/core/dev.c:12421
 unregister_netdevice_many net/core/dev.c:12484 [inline]
 unregister_netdevice_queue+0x31f/0x360 net/core/dev.c:12294
 unregister_netdevice include/linux/netdevice.h:3444 [inline]
 nsim_destroy+0x26d/0x7f0 drivers/net/netdevsim/netdev.c:1193
 __nsim_dev_port_del+0x14f/0x200 drivers/net/netdevsim/dev.c:1547
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1561 [inline]
 nsim_dev_reload_destroy+0x288/0x490 drivers/net/netdevsim/dev.c:1785
 nsim_dev_reload_down+0x8a/0xc0 drivers/net/netdevsim/dev.c:1038
 devlink_reload+0x1eb/0x8c0 net/devlink/dev.c:462
 devlink_nl_reload_doit+0xaaa/0xc80 net/devlink/dev.c:585
 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2555
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
 __sys_sendmsg net/socket.c:2784 [inline]
 __do_sys_sendmsg net/socket.c:2789 [inline]
 __se_sys_sendmsg net/socket.c:2787 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 insert_work+0x3d/0x330 kernel/workqueue.c:2226
 __queue_work+0xbba/0x1040 kernel/workqueue.c:2397
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2444
 queue_work include/linux/workqueue.h:698 [inline]
 udp_tunnel_nic_device_sync net/ipv4/udp_tunnel_nic.c:307 [inline]
 __udp_tunnel_nic_add_port+0xb71/0xd60 net/ipv4/udp_tunnel_nic.c:523
 udp_tunnel_nic_add_port include/net/udp_tunnel.h:402 [inline]
 udp_tunnel_push_rx_port+0x186/0x210 net/ipv4/udp_tunnel_core.c:112
 geneve_offload_rx_ports+0xc7/0x150 drivers/net/geneve.c:1657
 geneve_netdevice_event+0x6a/0x80 drivers/net/geneve.c:-1
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers+0x90/0xd0 net/core/dev.c:2301
 udp_tunnel_get_rx_info include/net/udp_tunnel.h:469 [inline]
 udp_tunnel_nic_register net/ipv4/udp_tunnel_nic.c:855 [inline]
 udp_tunnel_nic_netdevice_event+0xdef/0x17d0 net/ipv4/udp_tunnel_nic.c:931
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 register_netdevice+0x18c9/0x1ec0 net/core/dev.c:11461
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:1069 [inline]
 nsim_create+0xbed/0x1160 drivers/net/netdevsim/netdev.c:1151
 __nsim_dev_port_add+0x857/0xd30 drivers/net/netdevsim/dev.c:1509
 nsim_dev_port_add_all+0x37/0xf0 drivers/net/netdevsim/dev.c:1570
 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1622 [inline]
 nsim_dev_reload_up+0x45f/0x7c0 drivers/net/netdevsim/dev.c:1058
 devlink_reload+0x4f8/0x8c0 net/devlink/dev.c:475
 devlink_nl_reload_doit+0xaaa/0xc80 net/devlink/dev.c:585
 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2555
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
 __sys_sendmsg net/socket.c:2784 [inline]
 __do_sys_sendmsg net/socket.c:2789 [inline]
 __se_sys_sendmsg net/socket.c:2787 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Second to last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 insert_work+0x3d/0x330 kernel/workqueue.c:2226
 __queue_work+0xcef/0x1040 kernel/workqueue.c:2393
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2444
 queue_work include/linux/workqueue.h:698 [inline]
 udp_tunnel_nic_device_sync net/ipv4/udp_tunnel_nic.c:307 [inline]
 __udp_tunnel_nic_add_port+0xb71/0xd60 net/ipv4/udp_tunnel_nic.c:523
 udp_tunnel_nic_add_port include/net/udp_tunnel.h:402 [inline]
 udp_tunnel_push_rx_port+0x186/0x210 net/ipv4/udp_tunnel_core.c:112
 geneve_offload_rx_ports+0xc7/0x150 drivers/net/geneve.c:1657
 geneve_netdevice_event+0x6a/0x80 drivers/net/geneve.c:-1
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers+0x90/0xd0 net/core/dev.c:2301
 udp_tunnel_get_rx_info include/net/udp_tunnel.h:469 [inline]
 udp_tunnel_nic_register net/ipv4/udp_tunnel_nic.c:855 [inline]
 udp_tunnel_nic_netdevice_event+0xdef/0x17d0 net/ipv4/udp_tunnel_nic.c:931
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 register_netdevice+0x18c9/0x1ec0 net/core/dev.c:11461
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:1069 [inline]
 nsim_create+0xbed/0x1160 drivers/net/netdevsim/netdev.c:1151
 __nsim_dev_port_add+0x857/0xd30 drivers/net/netdevsim/dev.c:1509
 nsim_dev_port_add_all+0x37/0xf0 drivers/net/netdevsim/dev.c:1570
 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1622 [inline]
 nsim_dev_reload_up+0x45f/0x7c0 drivers/net/netdevsim/dev.c:1058
 devlink_reload+0x4f8/0x8c0 net/devlink/dev.c:475
 devlink_nl_reload_doit+0xaaa/0xc80 net/devlink/dev.c:585
 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2555
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
 __sys_sendmsg net/socket.c:2784 [inline]
 __do_sys_sendmsg net/socket.c:2789 [inline]
 __se_sys_sendmsg net/socket.c:2787 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88803414ca00
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 168 bytes inside of
 freed 256-byte region [ffff88803414ca00, ffff88803414cb00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3414c
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000000 ffff88801ac41b40 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800080008 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5480, tgid 5480 (syz-executor), ts 327907347868, free_ts 327882108557
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x2593/0x2610 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 alloc_slab_page mm/slub.c:3278 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3467
 new_slab mm/slub.c:3525 [inline]
 refill_objects+0x339/0x3d0 mm/slub.c:7272
 refill_sheaf mm/slub.c:2816 [inline]
 __pcs_replace_empty_main+0x321/0x720 mm/slub.c:4652
 alloc_from_pcs mm/slub.c:4750 [inline]
 slab_alloc_node mm/slub.c:4884 [inline]
 __kmalloc_cache_noprof+0x392/0x660 mm/slub.c:5415
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 ____ip_mc_inc_group+0x518/0xdd0 net/ipv4/igmp.c:1549
 __ip_mc_inc_group net/ipv4/igmp.c:1587 [inline]
 ip_mc_inc_group net/ipv4/igmp.c:1593 [inline]
 ip_mc_up+0x115/0x2e0 net/ipv4/igmp.c:1894
 inetdev_event+0xff6/0x1610 net/ipv4/devinet.c:1630
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 __dev_notify_flags+0x1a9/0x310 net/core/dev.c:9797
 netif_change_flags+0xe8/0x1a0 net/core/dev.c:9826
 do_setlink+0xfa5/0x45a0 net/core/rtnetlink.c:3181
 rtnl_changelink net/core/rtnetlink.c:3800 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3973 [inline]
 rtnl_newlink+0x15ad/0x1bb0 net/core/rtnetlink.c:4110
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6997
page last free pid 15 tgid 15 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xc1c/0xd30 mm/page_alloc.c:2938
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x7cd/0x1070 kernel/rcu/tree.c:2869
 handle_softirqs+0x22a/0x840 kernel/softirq.c:622
 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1076
 smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Memory state around the buggy address:
 ffff88803414c980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803414ca00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88803414ca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff88803414cb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803414cb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================