./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2310053613 <...> Warning: Permanently added '10.128.0.76' (ED25519) to the list of known hosts. execve("./syz-executor2310053613", ["./syz-executor2310053613"], 0x7ffdfa84b360 /* 10 vars */) = 0 brk(NULL) = 0x55558cc4a000 brk(0x55558cc4ad00) = 0x55558cc4ad00 arch_prctl(ARCH_SET_FS, 0x55558cc4a380) = 0 set_tid_address(0x55558cc4a650) = 5836 set_robust_list(0x55558cc4a660, 24) = 0 rseq(0x55558cc4aca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2310053613", 4096) = 28 getrandom("\x1d\x23\x02\xb9\xda\x88\x24\xbb", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558cc4ad00 brk(0x55558cc6bd00) = 0x55558cc6bd00 brk(0x55558cc6c000) = 0x55558cc6c000 mprotect(0x7f0f1313e000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5837 attached [pid 5837] set_robust_list(0x55558cc4a660, 24 [pid 5836] <... clone resumed>, child_tidptr=0x55558cc4a650) = 5837 [pid 5837] <... set_robust_list resumed>) = 0 [pid 5836] openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "10000000000", 11) = 11 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "20", 2) = 2 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "1", 1) = 1 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "0", 1) = 1 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "0", 1) = 1 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "1", 1) = 1 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "100", 3) = 3 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "0", 1) = 1 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "0", 1) = 1 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "7 4 1 3", 7) = 7 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "1", 1) = 1 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "1", 1) = 1 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "0", 1) = 1 [pid 5836] close(3) = 0 [pid 5836] openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "5837", 4) = 4 [pid 5836] close(3) = 0 [pid 5836] kill(5837, SIGKILL) = 0 [pid 5837] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5837, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5838 attached , child_tidptr=0x55558cc4a650) = 5838 [pid 5838] set_robust_list(0x55558cc4a660, 24) = 0 [pid 5838] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5838] getppid() = 0 [pid 5838] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5838] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5838] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5838] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5838] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5838] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5838] unshare(CLONE_NEWNS) = 0 [pid 5838] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5838] unshare(CLONE_NEWIPC) = 0 [pid 5838] unshare(CLONE_NEWCGROUP) = 0 [pid 5838] unshare(CLONE_NEWUTS) = 0 [pid 5838] unshare(CLONE_SYSVSEM) = 0 [pid 5838] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5838] write(3, "16777216", 8) = 8 [pid 5838] close(3) = 0 [pid 5838] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5838] write(3, "536870912", 9) = 9 [pid 5838] close(3) = 0 [pid 5838] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5838] write(3, "1024", 4) = 4 [pid 5838] close(3) = 0 [pid 5838] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5838] write(3, "8192", 4) = 4 [pid 5838] close(3) = 0 [pid 5838] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5838] write(3, "1024", 4) = 4 [pid 5838] close(3) = 0 [pid 5838] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5838] write(3, "1024", 4) = 4 [pid 5838] close(3) = 0 [pid 5838] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5838] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5838] close(3) = 0 [pid 5838] getpid() = 1 [pid 5838] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<) = 0 [pid 5838] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5855 attached [pid 5855] set_robust_list(0x55558cc4a660, 24) = 0 [pid 5855] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5855] setpgid(0, 0) = 0 [pid 5855] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5838] <... clone resumed>, child_tidptr=0x55558cc4a650) = 3 [pid 5855] <... openat resumed>) = 3 [pid 5855] write(3, "1000", 4) = 4 [pid 5855] close(3) = 0 executing program [pid 5855] read(200, 0x7ffed8d5a640, 1000) = -1 EAGAIN (Resource temporarily unavailable) [pid 5855] write(1, "executing program\n", 18) = 18 [pid 5855] socket(AF_NETLINK, SOCK_RAW, NETLINK_NETFILTER) = 3 [pid 5855] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x14\x00\x00\x00\x10\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0a\x20\x00\x00\x00\x00\x0a\x01\x03\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\xff\xfd\x09\x00\x01\x00\x73\x79\x7a\x30\x00\x00\x00\x00\x40\x00\x00\x00\x03\x0a\x01\x02\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x09\x00\x03\x00\x73\x79\x7a\x32\x00\x00\x00\x00\x14\x00\x04\x80\x08\x00\x02\x40\x32\x65\x8a\xeb\x08\x00\x01\x40"..., iov_len=204}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 204 [pid 5855] write(200, "\xaa\xaa\xaa\xaa\xaa\xaa\xff\xff\xff\xff\xff\xff\x08\x00\x45\xec\x00\x28\x00\x00\x00\x00\x00\x06\xb9\xe5\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x4e\x29\x44\x43\x42\x41\x44\x43\x42\x41\x50\x16\x00\x01\x54\x7c\x00\x20", 54) = 54 [pid 5855] close(3) = 0 [pid 5855] close(4) = -1 EBADF (Bad file descriptor) [pid 5855] close(5) = -1 EBADF (Bad file descriptor) [pid 5855] close(6) = -1 EBADF (Bad file descriptor) [pid 5855] close(7) = -1 EBADF (Bad file descriptor) [pid 5855] close(8) = -1 EBADF (Bad file descriptor) [pid 5855] close(9) = -1 EBADF (Bad file descriptor) [pid 5855] close(10) = -1 EBADF (Bad file descriptor) [pid 5855] close(11) = -1 EBADF (Bad file descriptor) [pid 5855] close(12) = -1 EBADF (Bad file descriptor) [pid 5855] close(13) = -1 EBADF (Bad file descriptor) [pid 5855] close(14) = -1 EBADF (Bad file descriptor) [pid 5855] close(15) = -1 EBADF (Bad file descriptor) [pid 5855] close(16) = -1 EBADF (Bad file descriptor) [pid 5855] close(17) = -1 EBADF (Bad file descriptor) [pid 5855] close(18) = -1 EBADF (Bad file descriptor) [pid 5855] close(19) = -1 EBADF (Bad file descriptor) [pid 5855] close(20) = -1 EBADF (Bad file descriptor) [pid 5855] close(21) = -1 EBADF (Bad file descriptor) [pid 5855] close(22) = -1 EBADF (Bad file descriptor) [pid 5855] close(23) = -1 EBADF (Bad file descriptor) [pid 5855] close(24) = -1 EBADF (Bad file descriptor) [pid 5855] close(25) = -1 EBADF (Bad file descriptor) [pid 5855] close(26) = -1 EBADF (Bad file descriptor) [pid 5855] close(27) = -1 EBADF (Bad file descriptor) [pid 5855] close(28) = -1 EBADF (Bad file descriptor) [pid 5855] close(29) = -1 EBADF (Bad file descriptor) [pid 5855] exit_group(0) = ? [pid 5855] +++ exited with 0 +++ [pid 5838] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 5838] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5856 attached [pid 5856] set_robust_list(0x55558cc4a660, 24) = 0 [pid 5856] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5856] setpgid(0, 0) = 0 [pid 5856] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5838] <... clone resumed>, child_tidptr=0x55558cc4a650) = 4 [ 107.874696][ C0] sched: DL replenish lagged too much [pid 5838] kill(-4, SIGKILL) = 0 [pid 5838] kill(4, SIGKILL) = 0 [pid 5856] <... openat resumed>) = ? [pid 5856] +++ killed by SIGKILL +++ [pid 5838] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=4, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=2 /* 0.02 s */} --- [ 277.939120][ T31] INFO: task kworker/u8:1:13 blocked for more than 145 seconds. [ 287.087699][ T31] Not tainted 6.15.0-rc6-syzkaller-00168-g239af1970bcb #0 [ 287.133898][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.