Extracting prog: 6m56.126655326s
Minimizing prog: 1h24m39.955259515s
Simplifying prog options: 14m45.045926964s
Extracting C: 5m10.221607677s
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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

program did not crash
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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
single: successfully extracted reproducer
found reproducer with 7 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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
write$cgroup_pid(0xffffffffffffffff, &(0x7f0000000040), 0x12)

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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_procs(0xffffffffffffffff, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r2, &(0x7f0000000040), 0x12)

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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
r1 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r2 = openat$cgroup_procs(r1, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r2, &(0x7f0000000040), 0x12)

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}}): mkdirat$cgroup_root-openat$cgroup_root-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
write$cgroup_freezer_state(0xffffffffffffffff, &(0x7f0000000400)='FROZEN\x00', 0x7)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_procs(r0, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r1, &(0x7f0000000040), 0x12)

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}}): mkdirat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_freezer_state(0xffffffffffffffff, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r0, &(0x7f0000000400)='FROZEN\x00', 0x7)
r1 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r2 = openat$cgroup_procs(r1, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r2, &(0x7f0000000040), 0x12)

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}}): openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, 0x0, 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, 0x0, 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, 0x0, 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, 0x0, 0x0)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, 0x0, 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, 0x0, 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, 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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
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}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

program did not crash
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root-openat$cgroup_root-openat$cgroup_freezer_state-write$cgroup_freezer_state-openat$cgroup_root-openat$cgroup_procs-write$cgroup_pid
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.net/syz0\x00', 0x1ff)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = openat$cgroup_freezer_state(r0, &(0x7f0000000140), 0x2, 0x0)
write$cgroup_freezer_state(r1, &(0x7f0000000400)='FROZEN\x00', 0x7)
r2 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r3 = openat$cgroup_procs(r2, &(0x7f00000001c0)='tasks\x00', 0x2, 0x0)
write$cgroup_pid(r3, &(0x7f0000000040), 0x12)

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
validation run: crashed=true
reproducing took 2h2m32.266664648s
repro crashed as (corrupted=false):
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 1660 Comm: kworker/u4:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Workqueue: phy106 ieee80211_iface_work
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1b40/0x6544 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
 seqcount_lockdep_reader_access include/linux/seqlock.h:102 [inline]
 ktime_get_coarse_real_ts64+0xe4/0x244 kernel/time/timekeeping.c:2261
 current_time+0x90/0x270 fs/inode.c:2538
 debugfs_get_inode fs/debugfs/inode.c:76 [inline]
 debugfs_create_dir+0x124/0x3f4 fs/debugfs/inode.c:603
 ieee80211_sta_debugfs_add+0x110/0x66c net/mac80211/debugfs_sta.c:1045
 sta_info_insert_finish net/mac80211/sta_info.c:882 [inline]
 sta_info_insert_rcu+0xbe4/0x1230 net/mac80211/sta_info.c:934
 ieee80211_ibss_finish_sta+0x1dc/0x2cc net/mac80211/ibss.c:585
 ieee80211_ibss_work+0x1c4/0xd60 net/mac80211/ibss.c:1697
 ieee80211_iface_work+0x9bc/0xa34 net/mac80211/iface.c:1755
 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292
 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered forwarding state
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50

final repro crashed as (corrupted=false):
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 1660 Comm: kworker/u4:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Workqueue: phy106 ieee80211_iface_work
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1b40/0x6544 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
 seqcount_lockdep_reader_access include/linux/seqlock.h:102 [inline]
 ktime_get_coarse_real_ts64+0xe4/0x244 kernel/time/timekeeping.c:2261
 current_time+0x90/0x270 fs/inode.c:2538
 debugfs_get_inode fs/debugfs/inode.c:76 [inline]
 debugfs_create_dir+0x124/0x3f4 fs/debugfs/inode.c:603
 ieee80211_sta_debugfs_add+0x110/0x66c net/mac80211/debugfs_sta.c:1045
 sta_info_insert_finish net/mac80211/sta_info.c:882 [inline]
 sta_info_insert_rcu+0xbe4/0x1230 net/mac80211/sta_info.c:934
 ieee80211_ibss_finish_sta+0x1dc/0x2cc net/mac80211/ibss.c:585
 ieee80211_ibss_work+0x1c4/0xd60 net/mac80211/ibss.c:1697
 ieee80211_iface_work+0x9bc/0xa34 net/mac80211/iface.c:1755
 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292
 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered forwarding state
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50