Extracting prog: 10m34.487644504s
Minimizing prog: 1h13m11.360035755s
Simplifying prog options: 15m24.751688275s
Extracting C: 5m10.640362937s
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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd-syz_emit_ethernet-openat$tun-socket$inet6_udp
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})
syz_emit_ethernet(0x0, 0x0, 0x0)
openat$tun(0xffffffffffffff9c, 0x0, 0x0, 0x0)
socket$inet6_udp(0xa, 0x2, 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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd-syz_emit_ethernet-openat$tun-socket$inet6_udp
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})
syz_emit_ethernet(0x0, 0x0, 0x0)
openat$tun(0xffffffffffffff9c, 0x0, 0x0, 0x0)
socket$inet6_udp(0xa, 0x2, 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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd-syz_emit_ethernet-openat$tun-socket$inet6_udp
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})
syz_emit_ethernet(0x0, 0x0, 0x0)
openat$tun(0xffffffffffffff9c, 0x0, 0x0, 0x0)
socket$inet6_udp(0xa, 0x2, 0x0)

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
single: successfully extracted reproducer
found reproducer with 7 syscalls
minimizing guilty program
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd-syz_emit_ethernet-openat$tun
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})
syz_emit_ethernet(0x0, 0x0, 0x0)
openat$tun(0xffffffffffffff9c, 0x0, 0x0, 0x0)

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd-syz_emit_ethernet
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})
syz_emit_ethernet(0x0, 0x0, 0x0)

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')

program did not crash
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {}, 0x2c, {'wfdno', 0x3d, r0}})

program did not crash
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r0}})

program did not crash
testing program (duration=6m3.540221911s, {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_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})

program did not crash
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, 0x0, 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})

program did not crash
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, 0x0)
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})

program did not crash
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, 0x0)
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})

program did not crash
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, 0x0, &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})

program did not crash
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', 0x0, 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})

program did not crash
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
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=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
extracting C reproducer
testing compiled C program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})

program did not crash
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
validation run: crashed=true
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
validation run: crashed=true
testing program (duration=6m3.540221911s, {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}}): openat-syz_open_procfs-syz_open_procfs-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000140)='./file2\x00', 0x4b142, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f0000000000)='fd/3\x00')
r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/4\x00')
mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f0000000200)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
validation run: crashed=true
reproducing took 1h56m38.014507041s
repro crashed as (corrupted=false):
netdevsim netdevsim3 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim3 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 8397 Comm: syz-executor Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline]
 validate_chain kernel/locking/lockdep.c:3876 [inline]
 __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5237
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162
 __debug_check_no_obj_freed lib/debugobjects.c:1088 [inline]
 debug_check_no_obj_freed+0x148/0x470 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2353 [inline]
 slab_free mm/slub.c:4695 [inline]
 kfree+0x11c/0x474 mm/slub.c:4894
 fib6_tables_dump+0x244/0x250 net/ipv6/ip6_fib.c:519
 fib6_dump+0x64/0x80 net/ipv6/fib6_notifier.c:39
 fib_net_dump net/core/fib_notifier.c:69 [inline]
 register_fib_notifier+0x168/0x348 net/core/fib_notifier.c:107
 nsim_fib_create+0x7b4/0x910 drivers/net/netdevsim/fib.c:1596
 nsim_drv_probe+0x69c/0x988 drivers/net/netdevsim/dev.c:1631
 nsim_bus_probe+0x20/0x30 drivers/net/netdevsim/bus.c:412
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x3b4/0x944 drivers/base/dd.c:659
 __driver_probe_device+0x180/0x2d4 drivers/base/dd.c:801
 driver_probe_device+0x78/0x330 drivers/base/dd.c:831
 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:959
 bus_for_each_drv+0x220/0x2b4 drivers/base/bus.c:462
 __device_attach+0x26c/0x388 drivers/base/dd.c:1031
 device_initial_probe+0x24/0x34 drivers/base/dd.c:1080
 bus_probe_device+0x178/0x240 drivers/base/bus.c:537
 device_add+0x71c/0xa60 drivers/base/core.c:3689
 device_register+0x28/0x38 drivers/base/core.c:3771
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:463 [inline]
 new_device_store+0x2c0/0x594 drivers/net/netdevsim/bus.c:191
 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
 sysfs_kf_write+0x1a8/0x23c fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x33c/0x4d0 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x540/0xa3c fs/read_write.c:686
 ksys_write+0x120/0x210 fs/read_write.c:738
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:746
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
netdevsim netdevsim3 netdevsim0: renamed from eth0
netdevsim netdevsim3 netdevsim1: renamed from eth1
netdevsim netdevsim3 netdevsim2: renamed from eth2
netdevsim netdevsim3 netdevsim3: renamed from eth3
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered forwarding state
bridge0: port 1(bridge_slave_0) entered blocking state
bridge0: port 1(bridge_slave_0) entered forwarding state
8021q: adding VLAN 0 to HW filter on device bond0
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device batadv0
veth0_vlan: entered promiscuous mode
veth1_vlan: entered promiscuous mode
veth0_macvtap: entered promiscuous mode
veth1_macvtap: entered promiscuous mode
batman_adv: batadv0: Interface activated: batadv_slave_0
batman_adv: batadv0: Interface activated: batadv_slave_1
ieee80211 phy131: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy132: Selected rate control algorithm 'minstrel_ht'

final repro crashed as (corrupted=false):
netdevsim netdevsim3 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim3 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 8397 Comm: syz-executor Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline]
 validate_chain kernel/locking/lockdep.c:3876 [inline]
 __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5237
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162
 __debug_check_no_obj_freed lib/debugobjects.c:1088 [inline]
 debug_check_no_obj_freed+0x148/0x470 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2353 [inline]
 slab_free mm/slub.c:4695 [inline]
 kfree+0x11c/0x474 mm/slub.c:4894
 fib6_tables_dump+0x244/0x250 net/ipv6/ip6_fib.c:519
 fib6_dump+0x64/0x80 net/ipv6/fib6_notifier.c:39
 fib_net_dump net/core/fib_notifier.c:69 [inline]
 register_fib_notifier+0x168/0x348 net/core/fib_notifier.c:107
 nsim_fib_create+0x7b4/0x910 drivers/net/netdevsim/fib.c:1596
 nsim_drv_probe+0x69c/0x988 drivers/net/netdevsim/dev.c:1631
 nsim_bus_probe+0x20/0x30 drivers/net/netdevsim/bus.c:412
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x3b4/0x944 drivers/base/dd.c:659
 __driver_probe_device+0x180/0x2d4 drivers/base/dd.c:801
 driver_probe_device+0x78/0x330 drivers/base/dd.c:831
 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:959
 bus_for_each_drv+0x220/0x2b4 drivers/base/bus.c:462
 __device_attach+0x26c/0x388 drivers/base/dd.c:1031
 device_initial_probe+0x24/0x34 drivers/base/dd.c:1080
 bus_probe_device+0x178/0x240 drivers/base/bus.c:537
 device_add+0x71c/0xa60 drivers/base/core.c:3689
 device_register+0x28/0x38 drivers/base/core.c:3771
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:463 [inline]
 new_device_store+0x2c0/0x594 drivers/net/netdevsim/bus.c:191
 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
 sysfs_kf_write+0x1a8/0x23c fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x33c/0x4d0 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x540/0xa3c fs/read_write.c:686
 ksys_write+0x120/0x210 fs/read_write.c:738
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:746
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
netdevsim netdevsim3 netdevsim0: renamed from eth0
netdevsim netdevsim3 netdevsim1: renamed from eth1
netdevsim netdevsim3 netdevsim2: renamed from eth2
netdevsim netdevsim3 netdevsim3: renamed from eth3
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered forwarding state
bridge0: port 1(bridge_slave_0) entered blocking state
bridge0: port 1(bridge_slave_0) entered forwarding state
8021q: adding VLAN 0 to HW filter on device bond0
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device batadv0
veth0_vlan: entered promiscuous mode
veth1_vlan: entered promiscuous mode
veth0_macvtap: entered promiscuous mode
veth1_macvtap: entered promiscuous mode
batman_adv: batadv0: Interface activated: batadv_slave_0
batman_adv: batadv0: Interface activated: batadv_slave_1
ieee80211 phy131: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy132: Selected rate control algorithm 'minstrel_ht'