Extracting prog: 3m36.794434161s
Minimizing prog: 1h27m49.719885094s
Simplifying prog options: 13m8.753340825s
Extracting C: 5m12.893705038s
Simplifying C: 0s


extracting reproducer from 45 programs
first checking the prog from the crash report
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-mount-gettid-timer_create-fcntl$lock-mprotect-timer_settime-clock_nanosleep
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
mount(0x0, 0x0, &(0x7f0000000080)='proc\x00', 0x0, 0x0)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 0x0)
clock_nanosleep(0x9, 0x1, &(0x7f0000000080)={0x77359400}, 0x0)

program crashed: WARNING in rcu_check_gp_start_stall
single: successfully extracted reproducer
found reproducer with 9 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-mount-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
mount(0x0, 0x0, &(0x7f0000000080)='proc\x00', 0x0, 0x0)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 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-mount-gettid-timer_create-fcntl$lock-mprotect
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
mount(0x0, 0x0, &(0x7f0000000080)='proc\x00', 0x0, 0x0)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)

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-mount-gettid-timer_create-fcntl$lock-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
mount(0x0, 0x0, &(0x7f0000000080)='proc\x00', 0x0, 0x0)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
timer_settime(r1, 0x1, &(0x7f0000000040), 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-mount-gettid-timer_create-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
mount(0x0, 0x0, &(0x7f0000000080)='proc\x00', 0x0, 0x0)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 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-mount-gettid-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
mount(0x0, 0x0, &(0x7f0000000080)='proc\x00', 0x0, 0x0)
gettid()
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(0x0, 0x1, &(0x7f0000000040), 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-mount-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
mount(0x0, 0x0, &(0x7f0000000080)='proc\x00', 0x0, 0x0)
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004}, &(0x7f0000bbdffc)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040), 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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, 0x0, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
gettid()
timer_create(0x0, 0x0, &(0x7f0000bbdffc)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040), 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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(0x0, 0x1, &(0x7f0000000040), 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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, 0x0, 0x0)

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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prlimit64-sched_setscheduler-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 0x0)

program crashed: INFO: rcu detected stall in corrupted
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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 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-gettid-timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000140)={0xa, 0x200000000000008b}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8)
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x11, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=<r1=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x1})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r1, 0x1, &(0x7f0000000040), 0x0)

program crashed: INFO: rcu detected stall in schedule_timeout
validation run: crashed=true
reproducing took 1h58m47.204292493s
repro crashed as (corrupted=false):
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=13477, q=622 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294964029-4294953527), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g13477 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:27848 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x15ae/0x4660 kernel/sched/core.c:6701
 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7011
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__timer_delete_sync+0x1ac/0x2e0 kernel/time/timer.c:1564
Code: 00 4d 85 f6 75 16 e8 e3 9a 10 00 eb 15 e8 dc 9a 10 00 e8 e7 c2 18 09 4d 85 f6 74 ea e8 cd 9a 10 00 fb 65 44 8b 35 5c e0 8c 7e <44> 89 f6 81 e6 00 00 0f 00 31 ff e8 64 9e 10 00 41 81 e6 00 00 0f
RSP: 0018:ffffc90000167aa0 EFLAGS: 00000293
RAX: ffffffff8176d7a3 RBX: ffffc90000167ba0 RCX: ffff88801b670000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000167b70 R08: ffffffff8e8c872f R09: 1ffffffff1d190e5
R10: dffffc0000000000 R11: fffffbfff1d190e6 R12: ffffffff8176d70e
R13: 1ffff9200002cf58 R14: 0000000080000000 R15: 0000000000000000
 timer_delete_sync kernel/time/timer.c:1629 [inline]
 del_timer_sync include/linux/timer.h:200 [inline]
 schedule_timeout+0x192/0x2d0 kernel/time/timer.c:2169
 rcu_gp_fqs_loop+0x30d/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </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 PID: 6017 Comm: syz.1.25 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:-1 [inline]
RIP: 0010:rcu_is_watching+0x1c/0xb0 kernel/rcu/tree.c:700
Code: 44 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 41 57 41 56 53 65 ff 05 68 7e 92 7e e8 cb 75 1e 09 89 c3 83 f8 08 73 60 <49> bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 30 6a a9 8c 4c 89 f0 48
RSP: 0018:ffffc900035c7780 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 26ebf818121d3a00
RDX: 0000000000000000 RSI: ffffffff8b1d3340 RDI: ffffffff8b1d3300
RBP: ffffc900035c78b0 R08: ffffffff8e8c872f R09: 1ffffffff1d190e5
R10: dffffc0000000000 R11: fffffbfff1d190e6 R12: 1ffff920006b8f00
R13: ffff88807777a7a0 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007ff8386896c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 0000000018e9c000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0xc6/0x420 kernel/locking/lockdep.c:5725
 __might_fault+0xc6/0x120 mm/memory.c:5968
 __clear_user arch/x86/include/asm/uaccess_64.h:167 [inline]
 copy_fpstate_to_sigframe+0x14b/0xce0 arch/x86/kernel/fpu/signal.c:216
 get_sigframe+0x5de/0x7d0 arch/x86/kernel/signal.c:142
 x64_setup_rt_frame+0x164/0xc30 arch/x86/kernel/signal_64.c:175
 setup_rt_frame arch/x86/kernel/signal.c:223 [inline]
 handle_signal arch/x86/kernel/signal.c:267 [inline]
 arch_do_signal_or_restart+0x411/0x7b0 arch/x86/kernel/signal.c:312
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff83779e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff8386890e8 EFLAGS: 00000246
RAX: fffffffffffffffc RBX: 00007ff837a25fa8 RCX: 00007ff83779e159
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff837a25fa8
RBP: 00007ff837a25fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff837a26038 R14: 00007ffd15cb0cb0 R15: 00007ffd15cb0d98
 </TASK>

final repro crashed as (corrupted=false):
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=13477, q=622 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294964029-4294953527), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g13477 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:27848 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x15ae/0x4660 kernel/sched/core.c:6701
 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7011
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__timer_delete_sync+0x1ac/0x2e0 kernel/time/timer.c:1564
Code: 00 4d 85 f6 75 16 e8 e3 9a 10 00 eb 15 e8 dc 9a 10 00 e8 e7 c2 18 09 4d 85 f6 74 ea e8 cd 9a 10 00 fb 65 44 8b 35 5c e0 8c 7e <44> 89 f6 81 e6 00 00 0f 00 31 ff e8 64 9e 10 00 41 81 e6 00 00 0f
RSP: 0018:ffffc90000167aa0 EFLAGS: 00000293
RAX: ffffffff8176d7a3 RBX: ffffc90000167ba0 RCX: ffff88801b670000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000167b70 R08: ffffffff8e8c872f R09: 1ffffffff1d190e5
R10: dffffc0000000000 R11: fffffbfff1d190e6 R12: ffffffff8176d70e
R13: 1ffff9200002cf58 R14: 0000000080000000 R15: 0000000000000000
 timer_delete_sync kernel/time/timer.c:1629 [inline]
 del_timer_sync include/linux/timer.h:200 [inline]
 schedule_timeout+0x192/0x2d0 kernel/time/timer.c:2169
 rcu_gp_fqs_loop+0x30d/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </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 PID: 6017 Comm: syz.1.25 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:-1 [inline]
RIP: 0010:rcu_is_watching+0x1c/0xb0 kernel/rcu/tree.c:700
Code: 44 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 41 57 41 56 53 65 ff 05 68 7e 92 7e e8 cb 75 1e 09 89 c3 83 f8 08 73 60 <49> bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 30 6a a9 8c 4c 89 f0 48
RSP: 0018:ffffc900035c7780 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 26ebf818121d3a00
RDX: 0000000000000000 RSI: ffffffff8b1d3340 RDI: ffffffff8b1d3300
RBP: ffffc900035c78b0 R08: ffffffff8e8c872f R09: 1ffffffff1d190e5
R10: dffffc0000000000 R11: fffffbfff1d190e6 R12: 1ffff920006b8f00
R13: ffff88807777a7a0 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007ff8386896c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 0000000018e9c000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0xc6/0x420 kernel/locking/lockdep.c:5725
 __might_fault+0xc6/0x120 mm/memory.c:5968
 __clear_user arch/x86/include/asm/uaccess_64.h:167 [inline]
 copy_fpstate_to_sigframe+0x14b/0xce0 arch/x86/kernel/fpu/signal.c:216
 get_sigframe+0x5de/0x7d0 arch/x86/kernel/signal.c:142
 x64_setup_rt_frame+0x164/0xc30 arch/x86/kernel/signal_64.c:175
 setup_rt_frame arch/x86/kernel/signal.c:223 [inline]
 handle_signal arch/x86/kernel/signal.c:267 [inline]
 arch_do_signal_or_restart+0x411/0x7b0 arch/x86/kernel/signal.c:312
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff83779e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff8386890e8 EFLAGS: 00000246
RAX: fffffffffffffffc RBX: 00007ff837a25fa8 RCX: 00007ff83779e159
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff837a25fa8
RBP: 00007ff837a25fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff837a26038 R14: 00007ffd15cb0cb0 R15: 00007ffd15cb0d98
 </TASK>