Extracting prog: 15m8.376183858s Minimizing prog: 1h21m36.390187213s Simplifying prog options: 0s Extracting C: 2m18.431975783s Simplifying C: 24m20.638057021s extracting reproducer from 56 programs testing a last program of every proc single: executing 16 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}}): get_mempolicy-gettid-timer_create-pipe-socketpair$unix-pipe-write$binfmt_script-splice-splice-timer_settime-write$FUSE_INIT detailed listing: executing program 0: get_mempolicy(0x0, &(0x7f0000000040), 0x11880, &(0x7f0000fff000/0x1000)=nil, 0x2) r0 = gettid() timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc)=0x0) pipe(&(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000940)={0xffffffffffffffff, 0xffffffffffffffff}) pipe(&(0x7f00000001c0)={0xffffffffffffffff, 0xffffffffffffffff}) write$binfmt_script(r3, 0x0, 0xb) splice(r4, 0x0, r3, 0x0, 0xf3a, 0x8) splice(r2, 0x0, r5, 0x0, 0x80, 0x8) timer_settime(r1, 0x0, &(0x7f0000000340)={{0x0, 0x989680}, {0x0, 0x989680}}, 0x0) write$FUSE_INIT(r3, &(0x7f0000000140)={0x50, 0x0, 0x0, {0x7, 0x2b, 0x7d4, 0x48000, 0x6, 0xf, 0x1, 0x16d1, 0x0, 0x0, 0x2a, 0x3}}, 0x50) 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}}): timer_create-fcntl$lock-close_range-inotify_add_watch-syz_create_resource$binfmt-mprotect-timer_settime-mmap-mq_open-mq_getsetattr-mq_timedreceive detailed listing: executing program 0: timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=0x0) fcntl$lock(0xffffffffffffffff, 0x24, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5}) close_range(0xffffffffffffffff, 0xffffffffffffffff, 0x2) inotify_add_watch(0xffffffffffffffff, &(0x7f00000001c0)='./file0\x00', 0x2904a3b527f1005) syz_create_resource$binfmt(0x0) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0) mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000) r1 = mq_open(&(0x7f0000000000)='batadv_slave_1\x00', 0x8c2, 0x30, &(0x7f0000000080)={0x8000000000000000, 0x8, 0x1, 0xc05}) mq_getsetattr(r1, &(0x7f0000000040)={0x0, 0x40, 0x4, 0x7ff}, 0x0) mq_timedreceive(r1, &(0x7f0000000500)=""/4096, 0x1000, 0x6, &(0x7f0000000240)={0x77359400}) 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-getpid-sched_setscheduler-mmap$IORING_OFF_SQ_RING-openat$ttyS3-ioctl$TIOCMIWAIT-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) r0 = getpid() sched_setscheduler(r0, 0x1, &(0x7f0000000200)=0x6) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) r1 = openat$ttyS3(0xffffffffffffff9c, &(0x7f0000000200), 0x0, 0x0) ioctl$TIOCMIWAIT(r1, 0x545c, 0x7cb7562f2d67) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program crashed: INFO: rcu detected stall in corrupted single: successfully extracted reproducer found reproducer with 11 syscalls minimizing guilty program testing program (duration=5m26.90736812s, {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-getpid-sched_setscheduler-mmap$IORING_OFF_SQ_RING-openat$ttyS3-ioctl$TIOCMIWAIT-timer_create-fcntl$lock-mprotect detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) r0 = getpid() sched_setscheduler(r0, 0x1, &(0x7f0000000200)=0x6) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) r1 = openat$ttyS3(0xffffffffffffff9c, &(0x7f0000000200), 0x0, 0x0) ioctl$TIOCMIWAIT(r1, 0x545c, 0x7cb7562f2d67) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) program did not crash testing program (duration=5m26.90736812s, {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-getpid-sched_setscheduler-mmap$IORING_OFF_SQ_RING-openat$ttyS3-ioctl$TIOCMIWAIT-timer_create-fcntl$lock-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) r0 = getpid() sched_setscheduler(r0, 0x1, &(0x7f0000000200)=0x6) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) r1 = openat$ttyS3(0xffffffffffffff9c, &(0x7f0000000200), 0x0, 0x0) ioctl$TIOCMIWAIT(r1, 0x545c, 0x7cb7562f2d67) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program did not crash testing program (duration=5m26.90736812s, {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-getpid-sched_setscheduler-mmap$IORING_OFF_SQ_RING-openat$ttyS3-ioctl$TIOCMIWAIT-timer_create-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) r0 = getpid() sched_setscheduler(r0, 0x1, &(0x7f0000000200)=0x6) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) r1 = openat$ttyS3(0xffffffffffffff9c, &(0x7f0000000200), 0x0, 0x0) ioctl$TIOCMIWAIT(r1, 0x545c, 0x7cb7562f2d67) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program did not crash testing program (duration=5m26.90736812s, {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-getpid-sched_setscheduler-mmap$IORING_OFF_SQ_RING-openat$ttyS3-ioctl$TIOCMIWAIT-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) r0 = getpid() sched_setscheduler(r0, 0x1, &(0x7f0000000200)=0x6) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) r1 = openat$ttyS3(0xffffffffffffff9c, &(0x7f0000000200), 0x0, 0x0) ioctl$TIOCMIWAIT(r1, 0x545c, 0x7cb7562f2d67) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program did not crash testing program (duration=5m26.90736812s, {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-getpid-sched_setscheduler-mmap$IORING_OFF_SQ_RING-openat$ttyS3-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) r0 = getpid() sched_setscheduler(r0, 0x1, &(0x7f0000000200)=0x6) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) openat$ttyS3(0xffffffffffffff9c, &(0x7f0000000200), 0x0, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program crashed: INFO: rcu detected stall in corrupted testing program (duration=5m26.90736812s, {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-getpid-sched_setscheduler-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) r0 = getpid() sched_setscheduler(r0, 0x1, &(0x7f0000000200)=0x6) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program crashed: INFO: rcu detected stall in syscall_exit_to_user_mode testing program (duration=5m26.90736812s, {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-getpid-sched_setscheduler-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) r0 = getpid() sched_setscheduler(r0, 0x1, &(0x7f0000000200)=0x6) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program did not crash testing program (duration=5m26.90736812s, {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-getpid-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) getpid() mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program crashed: INFO: rcu detected stall in corrupted testing program (duration=5m26.90736812s, {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-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program crashed: INFO: rcu detected stall in sys_rt_sigreturn testing program (duration=5m26.90736812s, {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-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program did not crash testing program (duration=5m26.90736812s, {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-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program did not crash testing program (duration=5m26.90736812s, {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-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, 0x0, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program did not crash testing program (duration=5m26.90736812s, {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-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, 0x0) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program did not crash testing program (duration=5m26.90736812s, {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-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, 0x0, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program did not crash testing program (duration=5m26.90736812s, {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-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, 0x0) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program did not crash testing program (duration=5m26.90736812s, {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-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, 0x0, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=5m26.90736812s, {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-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime program crashed: INFO: rcu detected stall in corrupted simplifying C reproducer testing compiled C program (duration=5m26.90736812s, {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-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime program crashed: no output from test machine a never seen crash title: no output from test machine, ignore testing compiled C program (duration=5m26.90736812s, {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-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime program crashed: no output from test machine a never seen crash title: no output from test machine, ignore testing compiled C program (duration=5m26.90736812s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prlimit64-sched_setscheduler-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime program crashed: INFO: rcu detected stall in corrupted testing compiled C program (duration=5m26.90736812s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prlimit64-sched_setscheduler-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime program crashed: INFO: rcu detected stall in schedule_timeout a never seen crash title: INFO: rcu detected stall in schedule_timeout, ignore testing compiled C program (duration=5m26.90736812s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prlimit64-sched_setscheduler-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime program crashed: INFO: rcu detected stall in syscall_exit_to_user_mode testing compiled C program (duration=5m26.90736812s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prlimit64-sched_setscheduler-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime program crashed: no output from test machine a never seen crash title: no output from test machine, ignore testing compiled C program (duration=5m26.90736812s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prlimit64-sched_setscheduler-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime program crashed: INFO: rcu detected stall in corrupted testing program (duration=5m26.90736812s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prlimit64-sched_setscheduler-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program crashed: INFO: rcu detected stall in schedule_timeout validation run: crashed=true testing program (duration=5m26.90736812s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prlimit64-sched_setscheduler-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program crashed: INFO: rcu detected stall in syscall_exit_to_user_mode validation run: crashed=true testing program (duration=5m26.90736812s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prlimit64-sched_setscheduler-mmap$IORING_OFF_SQ_RING-timer_create-fcntl$lock-mprotect-timer_settime detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f00000001c0)={0x8, 0xf32}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) mmap$IORING_OFF_SQ_RING(0x0, 0xc00000, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x0, @thr={0x0, 0x0}}, 0x0) fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x8000, 0x2}) mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1) timer_settime(0x0, 0x1, &(0x7f0000000040)={{0x77359400}}, 0x0) program crashed: INFO: rcu detected stall in worker_thread validation run: crashed=true reproducing took 2h12m25.308996062s 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): P3452/1:b..l rcu: (detected by 0, t=10502 jiffies, g=12473, q=546 ncpus=2) task:kworker/u4:8 state:R running task stack:24808 pid:3452 ppid:2 flags:0x00004000 Workqueue: bat_events batadv_nc_worker Call Trace: 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:441 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:rcu_preempt_read_exit kernel/rcu/tree_plugin.h:384 [inline] RIP: 0010:__rcu_read_unlock+0x26/0xd0 kernel/rcu/tree_plugin.h:423 Code: 00 00 66 90 f3 0f 1e fa 41 57 41 56 41 55 41 54 53 49 bf 00 00 00 00 00 fc ff df 65 48 8b 3d 01 9c 91 7e 48 8d 9f 3c 04 00 00 <49> 89 dc 49 c1 ec 03 43 0f b6 04 3c 84 c0 75 48 ff 0b 75 1d 4c 8d RSP: 0018:ffffc9000ce17b30 EFLAGS: 00000293 RAX: ffffffff8a5867cb RBX: ffff88802dcbc03c RCX: ffff88802dcbbc00 RDX: 0000000000000000 RSI: ffffffff8b1d3b80 RDI: ffff88802dcbbc00 RBP: 0000000000000000 R08: dffffc0000000000 R09: 1ffffffff223d6a0 R10: dffffc0000000000 R11: fffffbfff223d6a1 R12: dffffc0000000000 R13: ffffffff8a586692 R14: ffff88802f538d00 R15: dffffc0000000000 rcu_read_unlock include/linux/rcupdate.h:818 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x27c/0x600 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:2657 [inline] process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815 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 rcu: rcu_preempt kthread starved for 10523 jiffies! g12473 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 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: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x15ae/0x4660 kernel/sched/core.c:6701 schedule+0xbd/0x170 kernel/sched/core.c:6775 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168 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 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5981 Comm: syz.0.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:get_current kernel/entry/common.c:268 [inline] RIP: 0010:syscall_exit_to_user_mode_prepare+0x1/0xc0 kernel/entry/common.c:269 Code: 48 85 c0 74 09 48 8b 78 08 e8 cb f6 ff ff 65 ff 0d 4c 7b 8f 7e 75 94 e8 6d 60 8c ff eb 8d 0f 0b eb c4 0f 1f 80 00 00 00 00 55 <41> 57 41 56 53 50 65 48 8b 05 21 7b 8f 7e 48 8b 58 08 48 63 77 78 RSP: 0018:ffffc90003527f00 EFLAGS: 00000292 RAX: 0000000000000003 RBX: ffffc90003527f58 RCX: 2370c1ce0f162b00 RDX: 0000000000000000 RSI: ffffffff8acade60 RDI: ffffc90003527f58 RBP: ffffc90003527f48 R08: ffffffff8e8c316f R09: 1ffffffff1d1862d R10: dffffc0000000000 R11: fffffbfff1d1862e R12: 0000000000000000 R13: 0000000000000000 R14: ffffc90003527f58 R15: 0000000000000027 FS: 00007fd8210566c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000058 CR3: 0000000075bb0000 CR4: 00000000003506e0 Call Trace: __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0xd/0x50 kernel/entry/common.c:305 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fd820197ed7 Code: 8d 3d 14 9f 0b 00 e8 58 1d fa ff e8 a3 87 00 00 0f 1f 00 b8 68 00 00 00 0f 05 c3 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 RSP: 002b:00007fd821055b08 EFLAGS: 00000202 ORIG_RAX: 0000000000000027 RAX: 0000000000000003 RBX: 00007fd821055c70 RCX: 00007fd820197ed7 RDX: 00007fd821055b40 RSI: 00007fd821055c70 RDI: 0000000000000021 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 00007fd820426038 R14: 00007ffe1673d500 R15: 00007ffe1673d5e8 sched: RT throttling activated 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): P3452/1:b..l rcu: (detected by 0, t=10502 jiffies, g=12473, q=546 ncpus=2) task:kworker/u4:8 state:R running task stack:24808 pid:3452 ppid:2 flags:0x00004000 Workqueue: bat_events batadv_nc_worker Call Trace: 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:441 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:rcu_preempt_read_exit kernel/rcu/tree_plugin.h:384 [inline] RIP: 0010:__rcu_read_unlock+0x26/0xd0 kernel/rcu/tree_plugin.h:423 Code: 00 00 66 90 f3 0f 1e fa 41 57 41 56 41 55 41 54 53 49 bf 00 00 00 00 00 fc ff df 65 48 8b 3d 01 9c 91 7e 48 8d 9f 3c 04 00 00 <49> 89 dc 49 c1 ec 03 43 0f b6 04 3c 84 c0 75 48 ff 0b 75 1d 4c 8d RSP: 0018:ffffc9000ce17b30 EFLAGS: 00000293 RAX: ffffffff8a5867cb RBX: ffff88802dcbc03c RCX: ffff88802dcbbc00 RDX: 0000000000000000 RSI: ffffffff8b1d3b80 RDI: ffff88802dcbbc00 RBP: 0000000000000000 R08: dffffc0000000000 R09: 1ffffffff223d6a0 R10: dffffc0000000000 R11: fffffbfff223d6a1 R12: dffffc0000000000 R13: ffffffff8a586692 R14: ffff88802f538d00 R15: dffffc0000000000 rcu_read_unlock include/linux/rcupdate.h:818 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x27c/0x600 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:2657 [inline] process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815 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 rcu: rcu_preempt kthread starved for 10523 jiffies! g12473 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 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: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x15ae/0x4660 kernel/sched/core.c:6701 schedule+0xbd/0x170 kernel/sched/core.c:6775 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168 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 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5981 Comm: syz.0.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:get_current kernel/entry/common.c:268 [inline] RIP: 0010:syscall_exit_to_user_mode_prepare+0x1/0xc0 kernel/entry/common.c:269 Code: 48 85 c0 74 09 48 8b 78 08 e8 cb f6 ff ff 65 ff 0d 4c 7b 8f 7e 75 94 e8 6d 60 8c ff eb 8d 0f 0b eb c4 0f 1f 80 00 00 00 00 55 <41> 57 41 56 53 50 65 48 8b 05 21 7b 8f 7e 48 8b 58 08 48 63 77 78 RSP: 0018:ffffc90003527f00 EFLAGS: 00000292 RAX: 0000000000000003 RBX: ffffc90003527f58 RCX: 2370c1ce0f162b00 RDX: 0000000000000000 RSI: ffffffff8acade60 RDI: ffffc90003527f58 RBP: ffffc90003527f48 R08: ffffffff8e8c316f R09: 1ffffffff1d1862d R10: dffffc0000000000 R11: fffffbfff1d1862e R12: 0000000000000000 R13: 0000000000000000 R14: ffffc90003527f58 R15: 0000000000000027 FS: 00007fd8210566c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000058 CR3: 0000000075bb0000 CR4: 00000000003506e0 Call Trace: __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0xd/0x50 kernel/entry/common.c:305 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fd820197ed7 Code: 8d 3d 14 9f 0b 00 e8 58 1d fa ff e8 a3 87 00 00 0f 1f 00 b8 68 00 00 00 0f 05 c3 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 RSP: 002b:00007fd821055b08 EFLAGS: 00000202 ORIG_RAX: 0000000000000027 RAX: 0000000000000003 RBX: 00007fd821055c70 RCX: 00007fd820197ed7 RDX: 00007fd821055b40 RSI: 00007fd821055c70 RDI: 0000000000000021 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 00007fd820426038 R14: 00007ffe1673d500 R15: 00007ffe1673d5e8 sched: RT throttling activated