Extracting prog: 5m47.56381445s
Minimizing prog: 1h43m24.200770917s
Simplifying prog options: 15m0.665616178s
Extracting C: 41.55933053s
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:4 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}}): prlimit64-sched_setscheduler-openat$cgroup_ro-timer_create-fcntl$lock-mprotect-timer_settime-mmap-fcntl$lock-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
r0 = openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r1, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0xfc778000)
fcntl$lock(r0, 0x6, 0x0)
fcntl$lock(r0, 0x26, 0x0)

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:4 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}}): prlimit64-sched_setscheduler-openat$cgroup_ro-timer_create-fcntl$lock-mprotect-timer_settime-mmap-fcntl$lock-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
r0 = openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r1, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0xfc778000)
fcntl$lock(r0, 0x6, 0x0)
fcntl$lock(r0, 0x26, 0x0)

program crashed: INFO: rcu detected stall in corrupted
single: successfully extracted reproducer
found reproducer with 10 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$cgroup_ro-timer_create-fcntl$lock-mprotect-timer_settime-mmap-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
r0 = openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r1, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0xfc778000)
fcntl$lock(r0, 0x6, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$cgroup_ro-timer_create-fcntl$lock-mprotect-timer_settime-mmap-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
r0 = openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r1, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0xfc778000)
fcntl$lock(r0, 0x26, 0x0)

program crashed: INFO: rcu detected stall in corrupted
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$cgroup_ro-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
r0 = openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r1, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(r0, 0x26, 0x0)

program crashed: INFO: rcu detected stall in tun_chr_read_iter
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$cgroup_ro-timer_create-fcntl$lock-mprotect-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
r0 = openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300))
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
fcntl$lock(r0, 0x26, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$cgroup_ro-timer_create-fcntl$lock-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
r0 = openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
timer_settime(r1, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(r0, 0x26, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$cgroup_ro-timer_create-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
r0 = openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r1=>0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r1, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(r0, 0x26, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$cgroup_ro-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
r0 = openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(r0, 0x26, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program crashed: INFO: rcu detected stall in kthread
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, 0x0, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, 0x0, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, 0x0, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
program did not crash
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program crashed: INFO: rcu detected stall in schedule_timeout
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program crashed: INFO: rcu detected stall in worker_thread
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime-fcntl$lock
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x400000000008d}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8)
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x3ff})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x9)
timer_settime(r0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)

program did not crash
validation run: crashed=false
reproducing took 3h0m30.556396939s
repro crashed as (corrupted=false):
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P59/1:b..l P12/1:b..l P25/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=18425, q=1133 ncpus=2)
task:kworker/1:0     state:R  running task     stack:27560 pid:25    tgid:25    ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_power_efficient neigh_managed_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x17d4/0x5820 kernel/sched/core.c:7270
 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7449
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:220 [inline]
 _raw_spin_unlock_irq+0x47/0x50 kernel/locking/spinlock.c:229
 process_one_work kernel/workqueue.c:3362 [inline]
 process_scheduled_works+0xa23/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 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>
task:kworker/u8:0    state:R  running task     stack:24040 pid:12    tgid:12    ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound nsim_dev_trap_report_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x17d4/0x5820 kernel/sched/core.c:7270
 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7449
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 class_preempt_destructor include/linux/preempt.h:500 [inline]
 try_to_wake_up+0x8f2/0x14d0 kernel/sched/core.c:4432
 process_one_work kernel/workqueue.c:3364 [inline]
 process_scheduled_works+0xa3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 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>
task:kworker/u8:4    state:R  running task     stack:23272 pid:59    tgid:59    ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound nsim_dev_trap_report_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x17d4/0x5820 kernel/sched/core.c:7270
 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7592
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x910 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:preempt_count_add+0x6/0x140 kernel/sched/core.c:5979
Code: 00 cf a2 00 e9 70 ff ff ff e9 d3 fe ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 <41> 56 53 49 bf 00 00 00 00 00 fc ff df 48 63 c7 65 48 01 05 02 65
RSP: 0018:ffffc9000200fa58 EFLAGS: 00000282
RAX: 4a492bf60b745100 RBX: ffff88801dac8000 RCX: ffff88801c7cbe80
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000001
RBP: dffffc0000000000 R08: ffffffff909ba87f R09: 1ffffffff213750f
R10: dffffc0000000000 R11: fffffbfff2137510 R12: dffffc0000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
 class_preempt_constructor include/linux/preempt.h:500 [inline]
 try_to_wake_up+0x3c/0x14d0 kernel/sched/core.c:4263
 process_one_work kernel/workqueue.c:3364 [inline]
 process_scheduled_works+0xa3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 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>
rcu: rcu_preempt kthread starved for 3789 jiffies! g18425 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:28104 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x17d4/0x5820 kernel/sched/core.c:7270
 __schedule_loop kernel/sched/core.c:7347 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7362
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2122
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2330
 kthread+0x38b/0x480 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>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6003 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:restore_sigcontext arch/x86/kernel/signal_64.c:66 [inline]
RIP: 0010:__ia32_sys_rt_sigreturn+0x46f/0x8c0 arch/x86/kernel/signal_64.c:268
Code: 24 10 4c 89 70 c0 4c 8b b4 24 c0 00 00 00 48 8d 78 c8 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 66 d5 cd 00 48 8b 44 24 10 <4c> 89 70 c8 4c 8b b4 24 d0 00 00 00 48 8d b8 78 ff ff ff 48 89 f8
RSP: 0018:ffffc90003247ca0 EFLAGS: 00000246
RAX: ffffc90003247ff0 RBX: 1ffff92000648ffc RCX: ffff88802ce2ddc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90003247fb8
RBP: ffffc90003247ee0 R08: ffffc90003247ddf R09: 1ffff92000648fbb
R10: dffffc0000000000 R11: fffff52000648fbc R12: dffffc0000000000
R13: 0000000000000000 R14: 00007fd9c2825fa8 R15: 1ffff92000648fa0
FS:  00007fd9c34b16c0(0000) GS:ffff88812488a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 00000000788b0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd9c253f459
Code: 11 06 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 0c 25
RSP: 002b:00007fd9c34b0b40 EFLAGS: 00000206 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007fd9c2825fa8 RCX: 00007fd9c259e0d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000021
RBP: 00007fd9c2825fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fd9c2826038 R14: 00007ffdaeab0bd0 R15: 00007ffdaeab0cb8
 </TASK>

final repro crashed as (corrupted=false):
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P59/1:b..l P12/1:b..l P25/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=18425, q=1133 ncpus=2)
task:kworker/1:0     state:R  running task     stack:27560 pid:25    tgid:25    ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_power_efficient neigh_managed_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x17d4/0x5820 kernel/sched/core.c:7270
 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7449
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:220 [inline]
 _raw_spin_unlock_irq+0x47/0x50 kernel/locking/spinlock.c:229
 process_one_work kernel/workqueue.c:3362 [inline]
 process_scheduled_works+0xa23/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 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>
task:kworker/u8:0    state:R  running task     stack:24040 pid:12    tgid:12    ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound nsim_dev_trap_report_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x17d4/0x5820 kernel/sched/core.c:7270
 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7449
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 class_preempt_destructor include/linux/preempt.h:500 [inline]
 try_to_wake_up+0x8f2/0x14d0 kernel/sched/core.c:4432
 process_one_work kernel/workqueue.c:3364 [inline]
 process_scheduled_works+0xa3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 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>
task:kworker/u8:4    state:R  running task     stack:23272 pid:59    tgid:59    ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound nsim_dev_trap_report_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x17d4/0x5820 kernel/sched/core.c:7270
 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7592
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x910 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:preempt_count_add+0x6/0x140 kernel/sched/core.c:5979
Code: 00 cf a2 00 e9 70 ff ff ff e9 d3 fe ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 <41> 56 53 49 bf 00 00 00 00 00 fc ff df 48 63 c7 65 48 01 05 02 65
RSP: 0018:ffffc9000200fa58 EFLAGS: 00000282
RAX: 4a492bf60b745100 RBX: ffff88801dac8000 RCX: ffff88801c7cbe80
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000001
RBP: dffffc0000000000 R08: ffffffff909ba87f R09: 1ffffffff213750f
R10: dffffc0000000000 R11: fffffbfff2137510 R12: dffffc0000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
 class_preempt_constructor include/linux/preempt.h:500 [inline]
 try_to_wake_up+0x3c/0x14d0 kernel/sched/core.c:4263
 process_one_work kernel/workqueue.c:3364 [inline]
 process_scheduled_works+0xa3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 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>
rcu: rcu_preempt kthread starved for 3789 jiffies! g18425 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:28104 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x17d4/0x5820 kernel/sched/core.c:7270
 __schedule_loop kernel/sched/core.c:7347 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7362
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2122
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2330
 kthread+0x38b/0x480 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>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6003 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:restore_sigcontext arch/x86/kernel/signal_64.c:66 [inline]
RIP: 0010:__ia32_sys_rt_sigreturn+0x46f/0x8c0 arch/x86/kernel/signal_64.c:268
Code: 24 10 4c 89 70 c0 4c 8b b4 24 c0 00 00 00 48 8d 78 c8 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 66 d5 cd 00 48 8b 44 24 10 <4c> 89 70 c8 4c 8b b4 24 d0 00 00 00 48 8d b8 78 ff ff ff 48 89 f8
RSP: 0018:ffffc90003247ca0 EFLAGS: 00000246
RAX: ffffc90003247ff0 RBX: 1ffff92000648ffc RCX: ffff88802ce2ddc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90003247fb8
RBP: ffffc90003247ee0 R08: ffffc90003247ddf R09: 1ffff92000648fbb
R10: dffffc0000000000 R11: fffff52000648fbc R12: dffffc0000000000
R13: 0000000000000000 R14: 00007fd9c2825fa8 R15: 1ffff92000648fa0
FS:  00007fd9c34b16c0(0000) GS:ffff88812488a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 00000000788b0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd9c253f459
Code: 11 06 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 0c 25
RSP: 002b:00007fd9c34b0b40 EFLAGS: 00000206 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007fd9c2825fa8 RCX: 00007fd9c259e0d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000021
RBP: 00007fd9c2825fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fd9c2826038 R14: 00007ffdaeab0bd0 R15: 00007ffdaeab0cb8
 </TASK>