Extracting prog: 10m56.359278554s
Minimizing prog: 55m0.693028162s
Simplifying prog options: 19m30.924028675s
Extracting C: 5m14.136048734s
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: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$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, r1, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 0x0)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {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$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, r1, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 0x0)

program did not crash
single: failed to extract reproducer
single: executing 1 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}}): socket$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, r1, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 0x0)

program crashed: unregister_netdevice: waiting for DEV to become free
single: successfully extracted reproducer
found reproducer with 4 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$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, r1, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)

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$nl_generic-syz_genetlink_get_family_id$fou-syz_emit_ethernet
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 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}}): socket$nl_generic-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, 0x0, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 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$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, r0, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 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}}): socket$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$fou(0x0, 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, r1, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 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}}): socket$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, 0x0, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 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}}): socket$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, 0x0}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 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}}): socket$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={0x0}}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 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}}): socket$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, r1, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)
syz_emit_ethernet(0x0, 0x0, 0x0)

program did not crash
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$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
program did not crash
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, r1, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 0x0)

program crashed: unregister_netdevice: waiting for DEV to become free
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$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, r1, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 0x0)

program crashed: unregister_netdevice: waiting for DEV to become free
extracting C reproducer
testing compiled C 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$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, r1, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 0x0)

program crashed: unregister_netdevice: waiting for DEV to become free
validation run: crashed=true
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$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, r1, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 0x0)

program crashed: unregister_netdevice: waiting for DEV to become free
validation run: crashed=true
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$nl_generic-syz_genetlink_get_family_id$fou-sendmsg$FOU_CMD_ADD-syz_emit_ethernet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$fou(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$FOU_CMD_ADD(r0, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000080)={0x24, r1, 0x1, 0x70bd24, 0x25dfdbfe, {}, [@FOU_ATTR_PORT={0x6, 0x1, 0x4e20}, @FOU_ATTR_TYPE={0x5, 0x4, 0x1}]}, 0x24}}, 0x4000080)
syz_emit_ethernet(0x2a, &(0x7f0000000080)={@local, @empty, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x0, 0x0, 0x0, 0x11, 0x0, @empty, @empty}, {0x0, 0x4e20, 0x8}}}}}, 0x0)

program crashed: unregister_netdevice: waiting for DEV to become free
validation run: crashed=true
reproducing took 1h38m9.918092448s
repro crashed as (corrupted=false):
unregister_netdevice: waiting for lo to become free. Usage count = 3
ref_tracker: netdev@ffff888036268620 has 2/2 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4454 [inline]
     netdev_hold include/linux/netdevice.h:4483 [inline]
     dst_init+0xd9/0x480 net/core/dst.c:52
     dst_alloc+0x12a/0x170 net/core/dst.c:94
     rt_dst_alloc net/ipv4/route.c:1651 [inline]
     ip_route_input_slow net/ipv4/route.c:2429 [inline]
     ip_route_input_rcu+0x23e5/0x3130 net/ipv4/route.c:2543
     ip_route_input_noref+0x17c/0x270 net/ipv4/route.c:2554
     ip_rcv_finish_core+0x5af/0x1c00 net/ipv4/ip_input.c:407
     ip_rcv_finish+0x14c/0x2a0 net/ipv4/ip_input.c:490
     NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
     __netif_receive_skb_one_core net/core/dev.c:6209 [inline]
     __netif_receive_skb net/core/dev.c:6322 [inline]
     netif_receive_skb_internal net/core/dev.c:6408 [inline]
     netif_receive_skb+0x45b/0xbf0 net/core/dev.c:6467
     tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1487
     tun_get_user+0x2aeb/0x3ed0 drivers/net/tun.c:1955
     tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2001
     new_sync_write fs/read_write.c:595 [inline]
     vfs_write+0x61d/0xb90 fs/read_write.c:688
     ksys_write+0x150/0x270 fs/read_write.c:740
     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
     do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
     entry_SYSCALL_64_after_hwframe+0x77/0x7f


final repro crashed as (corrupted=false):
unregister_netdevice: waiting for lo to become free. Usage count = 3
ref_tracker: netdev@ffff888036268620 has 2/2 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4454 [inline]
     netdev_hold include/linux/netdevice.h:4483 [inline]
     dst_init+0xd9/0x480 net/core/dst.c:52
     dst_alloc+0x12a/0x170 net/core/dst.c:94
     rt_dst_alloc net/ipv4/route.c:1651 [inline]
     ip_route_input_slow net/ipv4/route.c:2429 [inline]
     ip_route_input_rcu+0x23e5/0x3130 net/ipv4/route.c:2543
     ip_route_input_noref+0x17c/0x270 net/ipv4/route.c:2554
     ip_rcv_finish_core+0x5af/0x1c00 net/ipv4/ip_input.c:407
     ip_rcv_finish+0x14c/0x2a0 net/ipv4/ip_input.c:490
     NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
     __netif_receive_skb_one_core net/core/dev.c:6209 [inline]
     __netif_receive_skb net/core/dev.c:6322 [inline]
     netif_receive_skb_internal net/core/dev.c:6408 [inline]
     netif_receive_skb+0x45b/0xbf0 net/core/dev.c:6467
     tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1487
     tun_get_user+0x2aeb/0x3ed0 drivers/net/tun.c:1955
     tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2001
     new_sync_write fs/read_write.c:595 [inline]
     vfs_write+0x61d/0xb90 fs/read_write.c:688
     ksys_write+0x150/0x270 fs/read_write.c:740
     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
     do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
     entry_SYSCALL_64_after_hwframe+0x77/0x7f