./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor671006060 <...> Warning: Permanently added '10.128.0.21' (ED25519) to the list of known hosts. execve("./syz-executor671006060", ["./syz-executor671006060"], 0x7ffca3a50240 /* 10 vars */) = 0 brk(NULL) = 0x55558d787000 brk(0x55558d787e00) = 0x55558d787e00 arch_prctl(ARCH_SET_FS, 0x55558d787480) = 0 set_tid_address(0x55558d787750) = 5833 set_robust_list(0x55558d787760, 24) = 0 rseq(0x55558d787da0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor671006060", 4096) = 27 getrandom("\xdf\x2a\x0e\xa5\xc3\xd5\xb4\xf3", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558d787e00 brk(0x55558d7a8e00) = 0x55558d7a8e00 brk(0x55558d7a9000) = 0x55558d7a9000 mprotect(0x7fc3ed66a000, 16384, PROT_READ) = 0 mmap(0x3ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3ffffffff000 mmap(0x400000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x400000000000 mmap(0x400001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x400001000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5834 attached , child_tidptr=0x55558d787750) = 5834 [pid 5834] set_robust_list(0x55558d787760, 24) = 0 [pid 5833] openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "10000000000", 11) = 11 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "20", 2) = 2 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "1", 1) = 1 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "0", 1) = 1 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "0", 1) = 1 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "1", 1) = 1 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "100", 3) = 3 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "0", 1) = 1 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "0", 1) = 1 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "7 4 1 3", 7) = 7 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "1", 1) = 1 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "1", 1) = 1 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "0", 1) = 1 [pid 5833] close(3) = 0 [pid 5833] openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "5834", 4) = 4 [pid 5833] close(3) = 0 [pid 5833] kill(5834, SIGKILL) = 0 [pid 5834] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5834, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7fc3ed5bab40, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fc3ed5c5aa0}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7fc3ed5bab40, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fc3ed5c5aa0}, NULL, 8) = 0 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5835 attached [pid 5835] set_robust_list(0x55558d787760, 24 [pid 5833] <... clone resumed>, child_tidptr=0x55558d787750) = 5835 [pid 5835] <... set_robust_list resumed>) = 0 [pid 5835] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5835] getppid() = 0 [pid 5835] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5835] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5835] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5835] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5835] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5835] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5835] unshare(CLONE_NEWNS) = 0 [pid 5835] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5835] unshare(CLONE_NEWIPC) = 0 [pid 5835] unshare(CLONE_NEWCGROUP) = 0 [pid 5835] unshare(CLONE_NEWUTS) = 0 [pid 5835] unshare(CLONE_SYSVSEM) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "16777216", 8) = 8 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "536870912", 9) = 9 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "1024", 4) = 4 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "8192", 4) = 4 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "1024", 4) = 4 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "1024", 4) = 4 [pid 5835] close(3) = 0 [pid 5835] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5835] close(3) = 0 [pid 5835] getpid() = 1 [pid 5835] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5835] kill(-4, SIGKILL) = 0 [pid 5835] kill(4, SIGKILL) = 0 [pid 5852] <... openat resumed>) = ? [pid 5852] +++ killed by SIGKILL +++ [pid 5835] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=4, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=3 /* 0.03 s */} --- [ 293.144282][ T30] INFO: task kworker/0:2:974 blocked for more than 145 seconds. [ 293.152035][ T30] Not tainted 6.14.0-rc2-next-20250214-syzkaller #0 [ 294.625966][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 298.525267][ T30] task:kworker/0:2 state:D stack:23248 pid:974 tgid:974 ppid:2 task_flags:0x4208060 flags:0x00004000 [ 299.370854][ T30] Workqueue: events reg_todo [ 299.418960][ T30] Call Trace: [ 299.422296][ T30] [ 301.495378][ T30] __schedule+0x190e/0x4c90 [ 301.500008][ T30] ? __pfx___schedule+0x10/0x10