./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2091330550 <...> Warning: Permanently added '10.128.10.22' (ED25519) to the list of known hosts. execve("./syz-executor2091330550", ["./syz-executor2091330550"], 0x7fff88b30220 /* 10 vars */) = 0 brk(NULL) = 0x555585166000 brk(0x555585166d00) = 0x555585166d00 arch_prctl(ARCH_SET_FS, 0x555585166380) = 0 set_tid_address(0x555585166650) = 5859 set_robust_list(0x555585166660, 24) = 0 rseq(0x555585166ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2091330550", 4096) = 28 getrandom("\x28\x48\x79\x45\x14\x71\x52\x4d", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555585166d00 brk(0x555585187d00) = 0x555585187d00 brk(0x555585188000) = 0x555585188000 mprotect(0x7f6d52b7d000, 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, child_tidptr=0x555585166650) = 5860 ./strace-static-x86_64: Process 5860 attached [pid 5859] openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC [pid 5860] set_robust_list(0x555585166660, 24 [pid 5859] <... openat resumed>) = 3 [pid 5859] write(3, "10000000000", 11 [pid 5860] <... set_robust_list resumed>) = 0 [pid 5859] <... write resumed>) = 11 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "20", 2) = 2 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "1", 1) = 1 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "0", 1) = 1 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "0", 1) = 1 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "1", 1) = 1 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "100", 3) = 3 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "0", 1) = 1 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "0", 1) = 1 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "7 4 1 3", 7) = 7 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "1", 1) = 1 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "1", 1) = 1 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "0", 1) = 1 [pid 5859] close(3) = 0 [pid 5859] openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "5860", 4) = 4 [pid 5859] close(3) = 0 [pid 5859] kill(5860, SIGKILL) = 0 [pid 5860] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5860, 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 5861 attached , child_tidptr=0x555585166650) = 5861 [pid 5861] set_robust_list(0x555585166660, 24) = 0 [pid 5861] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5861] getppid() = 0 [pid 5861] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5861] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5861] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5861] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5861] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5861] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5861] unshare(CLONE_NEWNS) = 0 [pid 5861] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5861] unshare(CLONE_NEWIPC) = 0 [pid 5861] unshare(CLONE_NEWCGROUP) = 0 [pid 5861] unshare(CLONE_NEWUTS) = 0 [pid 5861] unshare(CLONE_SYSVSEM) = 0 [pid 5861] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5861] write(3, "16777216", 8) = 8 [pid 5861] close(3) = 0 [pid 5861] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5861] write(3, "536870912", 9) = 9 [pid 5861] close(3) = 0 [pid 5861] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5861] write(3, "1024", 4) = 4 [pid 5861] close(3) = 0 [pid 5861] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5861] write(3, "8192", 4) = 4 [pid 5861] close(3) = 0 [pid 5861] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5861] write(3, "1024", 4) = 4 [pid 5861] close(3) = 0 [pid 5861] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5861] write(3, "1024", 4) = 4 [pid 5861] close(3) = 0 [pid 5861] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5861] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5861] close(3) = 0 [pid 5861] getpid() = 1 [pid 5861] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<) = 0 [pid 5861] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5873 attached [pid 5873] set_robust_list(0x555585166660, 24) = 0 [pid 5861] <... clone resumed>, child_tidptr=0x555585166650) = 3 [pid 5873] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5873] setpgid(0, 0) = 0 [pid 5873] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5873] write(3, "1000", 4) = 4 [pid 5873] close(3) = 0 [pid 5873] read(200, 0x7ffd20d148b0, 1000) = -1 EAGAIN (Resource temporarily unavailable) executing program [pid 5873] write(1, "executing program\n", 18) = 18 [pid 5873] socket(AF_NETLINK, SOCK_RAW, NETLINK_NETFILTER) = 3 [pid 5873] 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 5873] write(200, "\xaa\xaa\xaa\xaa\xaa\xaa\xff\xff\xff\xff\xff\xff\x08\x00\x45\x00\x00\x2c\x00\x00\x00\x00\x00\x06\xba\xcd\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x4e\x29\x44\x43\x42\x41\x44\x43\x42\x41\x60\x16\x00\x01\x42\x96\x00\x00\x02\x02\x00\x00", 58) = 58 [ 154.754162][ C0] sched: DL replenish lagged too much [pid 5873] close(3 [pid 5861] kill(-3, SIGKILL) = 0 [pid 5861] kill(3, SIGKILL) = 0 [pid 5873] <... close resumed>) = ? [pid 5873] +++ killed by SIGKILL +++ [pid 5861] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=3, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=2 /* 0.02 s */} --- [pid 5861] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5875 attached [pid 5875] set_robust_list(0x555585166660, 24) = 0 [pid 5875] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5875] setpgid(0, 0) = 0 [pid 5875] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5861] <... clone resumed>, child_tidptr=0x555585166650) = 4 [pid 5861] kill(-4, SIGKILL) = 0 [pid 5861] kill(4, SIGKILL) = 0 [pid 5875] <... openat resumed>) = ? [pid 5875] +++ killed by SIGKILL +++ [pid 5861] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=4, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=4 /* 0.04 s */} --- [ 388.941891][ T31] INFO: task kworker/0:3:5871 blocked for more than 148 seconds. [ 393.327098][ T31] Not tainted 6.15.0-rc5-syzkaller-00143-g4227ea91e265 #0 [ 393.687131][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 393.731433][ T31] task:kworker/0:3 state:D stack:23400 pid:5871 tgid:5871 ppid:2 task_flags:0x4208060 flags:0x00004000