ci2-upstream-fs/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-upstream-fs/syz-executor806876043 <...> Warning: Permanently added '10.128.0.97' (ED25519) to the list of known hosts. execve("ci2-upstream-fs/syz-executor806876043", ["ci2-upstream-fs/syz-executor806876043"], 0x7ffcd9f41d40 /* 10 vars */) = 0 brk(NULL) = 0x5555869e6000 brk(0x5555869e6d80) = 0x5555869e6d80 arch_prctl(ARCH_SET_FS, 0x5555869e6400) = 0 set_tid_address(0x5555869e66d0) = 5618 set_robust_list(0x5555869e66e0, 24) = 0 rseq({cpu_id_start=0, cpu_id=RSEQ_CPU_ID_UNINITIALIZED, rseq_cs=NULL, flags=0, node_id=0, mm_cid=0, slice_ctrl={request=0, granted=0, __reserved=0}, __reserved=0}, 33, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlinkat(AT_FDCWD, "/proc/self/exe", "/root/ci2-upstream-fs/syz-executor806876043", 4096) = 43 getrandom("\xa6\xb0\xc4\xc5\x59\x38\x16\x2c", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555869e6d80 brk(0x555586a07d80) = 0x555586a07d80 brk(0x555586a08000) = 0x555586a08000 mprotect(0x7fec46a17000, 20480, 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 rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5619 attached , child_tidptr=0x5555869e66d0) = 5619 [pid 5619] set_robust_list(0x5555869e66e0, 24) = 0 [pid 5619] rt_sigprocmask(SIG_SETMASK, [] [pid 5618] rt_sigprocmask(SIG_SETMASK, [] [pid 5619] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5618] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5618] openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "10000000000", 11) = 11 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "20", 2) = 2 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "1", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "0", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "0", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "1", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "100", 3) = 3 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "0", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "0", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "7 4 1 3", 7) = 7 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "1", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "1", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/sys/kernel/debug/failslab/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "Y", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/sys/kernel/debug/fail_page_alloc/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "Y", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/sys/kernel/debug/fail_futex/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "Y", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/sys/kernel/debug/fail_usercopy/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "Y", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/sys/kernel/debug/fail_make_request/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "Y", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/sys/kernel/debug/fail_io_timeout/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "Y", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/sys/kernel/debug/fail_iommufd/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "Y", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "0", 1) = 1 [pid 5618] close(3) = 0 [pid 5618] openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 [pid 5618] write(3, "5619", 4) = 4 [pid 5618] close(3) = 0 [pid 5618] kill(5619, SIGKILL) = 0 [pid 5619] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5619, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5620 attached [pid 5620] set_robust_list(0x5555869e66e0, 24 [pid 5618] <... clone resumed>, child_tidptr=0x5555869e66d0) = 5620 [pid 5620] <... set_robust_list resumed>) = 0 [pid 5618] rt_sigprocmask(SIG_SETMASK, [] [pid 5620] rt_sigprocmask(SIG_SETMASK, [] [pid 5618] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5620] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5618] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5620] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5618] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5620] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5620] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5621 attached ci2-upstream-fs/strace-static-x86_64: Process 5622 attached [pid 5621] set_robust_list(0x5555869e66e0, 24 [pid 5620] <... clone resumed>, child_tidptr=0x5555869e66d0) = 5621 [pid 5618] <... clone resumed>, child_tidptr=0x5555869e66d0) = 5622 [pid 5622] set_robust_list(0x5555869e66e0, 24 [pid 5618] rt_sigprocmask(SIG_SETMASK, [] [pid 5621] <... set_robust_list resumed>) = 0 [pid 5620] rt_sigprocmask(SIG_SETMASK, [] [pid 5618] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5622] <... set_robust_list resumed>) = 0 [pid 5621] rt_sigprocmask(SIG_SETMASK, [] [pid 5618] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5621] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5622] rt_sigprocmask(SIG_SETMASK, [] [pid 5618] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5618] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5622] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5621] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5620] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5621] <... prctl resumed>) = 0 [pid 5621] setpgid(0, 0) = 0 [pid 5621] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5621] write(3, "1000", 4) = 4 [pid 5621] close(3) = 0 [pid 5621] write(1, "executing program\n", 18 [pid 5622] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5621] <... write resumed>) = 18 executing program [pid 5621] mkdirat(AT_FDCWD, "./sys", 0777 [pid 5622] <... rt_sigprocmask resumed>, [], 8) = 0 ci2-upstream-fs/strace-static-x86_64: Process 5623 attached [pid 5618] <... clone resumed>, child_tidptr=0x5555869e66d0) = 5623 [pid 5622] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5618] rt_sigprocmask(SIG_SETMASK, [] [pid 5623] set_robust_list(0x5555869e66e0, 24 [pid 5621] <... mkdirat resumed>) = 0 ci2-upstream-fs/strace-static-x86_64: Process 5624 attached [pid 5618] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5623] <... set_robust_list resumed>) = 0 [pid 5618] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5623] rt_sigprocmask(SIG_SETMASK, [] [pid 5622] <... clone resumed>, child_tidptr=0x5555869e66d0) = 5624 [pid 5621] mount(NULL, "./sys", "sysfs", 0, NULL [pid 5618] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5624] set_robust_list(0x5555869e66e0, 24 [pid 5623] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5622] rt_sigprocmask(SIG_SETMASK, [] [pid 5618] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5624] <... set_robust_list resumed>) = 0 [pid 5621] <... mount resumed>) = 0 [pid 5623] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5622] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5624] rt_sigprocmask(SIG_SETMASK, [] [pid 5623] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5621] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLYci2-upstream-fs/strace-static-x86_64: Process 5625 attached [pid 5624] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5623] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5618] <... clone resumed>, child_tidptr=0x5555869e66d0) = 5625 [pid 5625] set_robust_list(0x5555869e66e0, 24 [pid 5624] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5618] rt_sigprocmask(SIG_SETMASK, [] [pid 5625] <... set_robust_list resumed>) = 0 [pid 5624] <... prctl resumed>) = 0 [pid 5618] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5625] rt_sigprocmask(SIG_SETMASK, [] [pid 5624] setpgid(0, 0ci2-upstream-fs/strace-static-x86_64: Process 5626 attached [pid 5618] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5625] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5624] <... setpgid resumed>) = 0 [pid 5621] <... openat resumed>) = 3 [pid 5618] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5625] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5618] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5626] set_robust_list(0x5555869e66e0, 24 [pid 5624] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5621] write(3, "- - -", 5 [pid 5626] <... set_robust_list resumed>) = 0 [pid 5625] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5624] <... openat resumed>) = 3 [pid 5623] <... clone resumed>, child_tidptr=0x5555869e66d0) = 5626 [pid 5626] rt_sigprocmask(SIG_SETMASK, [] [pid 5623] rt_sigprocmask(SIG_SETMASK, []ci2-upstream-fs/strace-static-x86_64: Process 5627 attached [pid 5626] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5625] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5624] write(3, "1000", 4 [pid 5623] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5624] <... write resumed>) = 4 [pid 5627] set_robust_list(0x5555869e66e0, 24) = 0 [pid 5627] rt_sigprocmask(SIG_SETMASK, [] [pid 5624] close(3 [pid 5627] <... rt_sigprocmask resumed>, NULL, 8) = 0 ci2-upstream-fs/strace-static-x86_64: Process 5628 attached [pid 5618] <... clone resumed>, child_tidptr=0x5555869e66d0) = 5627 [pid 5627] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5626] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5624] <... close resumed>) = 0 [pid 5618] rt_sigprocmask(SIG_SETMASK, [] [pid 5628] set_robust_list(0x5555869e66e0, 24 [pid 5627] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5626] <... prctl resumed>) = 0 [pid 5625] <... clone resumed>, child_tidptr=0x5555869e66d0) = 5628 executing program [pid 5624] write(1, "executing program\n", 18 [pid 5618] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5628] <... set_robust_list resumed>) = 0 [pid 5627] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5626] setpgid(0, 0 [pid 5625] rt_sigprocmask(SIG_SETMASK, [] [pid 5624] <... write resumed>) = 18 [pid 5628] rt_sigprocmask(SIG_SETMASK, [] [pid 5626] <... setpgid resumed>) = 0 [pid 5625] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5624] mkdirat(AT_FDCWD, "./sys", 0777ci2-upstream-fs/strace-static-x86_64: Process 5629 attached [pid 5628] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5626] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5629] set_robust_list(0x5555869e66e0, 24 [pid 5628] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5624] <... mkdirat resumed>) = -1 EEXIST (File exists) [pid 5629] <... set_robust_list resumed>) = 0 [pid 5628] <... prctl resumed>) = 0 [pid 5627] <... clone resumed>, child_tidptr=0x5555869e66d0) = 5629 [pid 5626] <... openat resumed>) = 3 [pid 5624] mount(NULL, "./sys", "sysfs", 0, NULL [pid 5629] rt_sigprocmask(SIG_SETMASK, [] [pid 5628] setpgid(0, 0 [pid 5629] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5628] <... setpgid resumed>) = 0 [pid 5627] rt_sigprocmask(SIG_SETMASK, [] [pid 5626] write(3, "1000", 4 [pid 5624] <... mount resumed>) = -1 EBUSY (Device or resource busy) [pid 5629] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5628] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5629] <... prctl resumed>) = 0 [pid 5624] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY [pid 5629] setpgid(0, 0 [pid 5628] <... openat resumed>) = 3 [pid 5627] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5626] <... write resumed>) = 4 [pid 5629] <... setpgid resumed>) = 0 [pid 5628] write(3, "1000", 4 [pid 5624] <... openat resumed>) = 3 [pid 5629] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5628] <... write resumed>) = 4 [pid 5626] close(3 [pid 5624] write(3, "- - -", 5 [pid 5629] <... openat resumed>) = 3 [pid 5628] close(3 [pid 5626] <... close resumed>) = 0 executing program [pid 5626] write(1, "executing program\n", 18) = 18 [pid 5626] mkdirat(AT_FDCWD, "./sys", 0777 [pid 5629] write(3, "1000", 4 [pid 5628] <... close resumed>) = 0 [pid 5629] <... write resumed>) = 4 [pid 5628] write(1, "executing program\n", 18 [pid 5626] <... mkdirat resumed>) = -1 EEXIST (File exists) executing program [pid 5629] close(3 [pid 5628] <... write resumed>) = 18 [pid 5626] mount(NULL, "./sys", "sysfs", 0, NULL [pid 5629] <... close resumed>) = 0 [pid 5628] mkdirat(AT_FDCWD, "./sys", 0777 [pid 5626] <... mount resumed>) = -1 EBUSY (Device or resource busy) [pid 5629] write(1, "executing program\n", 18 [pid 5628] <... mkdirat resumed>) = -1 EEXIST (File exists) executing program [pid 5626] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY [pid 5629] <... write resumed>) = 18 [pid 5628] mount(NULL, "./sys", "sysfs", 0, NULL [pid 5626] <... openat resumed>) = 3 [pid 5629] mkdirat(AT_FDCWD, "./sys", 0777) = -1 EEXIST (File exists) [pid 5628] <... mount resumed>) = -1 EBUSY (Device or resource busy) [pid 5626] write(3, "- - -", 5 [pid 5629] mount(NULL, "./sys", "sysfs", 0, NULL [pid 5628] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY [pid 5629] <... mount resumed>) = -1 EBUSY (Device or resource busy) [pid 5629] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY [pid 5628] <... openat resumed>) = 3 [pid 5628] write(3, "- - -", 5 [pid 5629] <... openat resumed>) = 3 [pid 5629] write(3, "- - -", 5 [pid 5620] kill(-5621, SIGKILL) = 0 [pid 5620] kill(5621, SIGKILL) = 0 [pid 5622] kill(-5624, SIGKILL) = 0 [pid 5622] kill(5624, SIGKILL) = 0 [pid 5623] kill(-5626, SIGKILL) = 0 [pid 5623] kill(5626, SIGKILL) = 0 [pid 5627] kill(-5629, SIGKILL [pid 5625] kill(-5628, SIGKILL [pid 5627] <... kill resumed>) = 0 [pid 5625] <... kill resumed>) = 0 [pid 5625] kill(5628, SIGKILL [pid 5627] kill(5629, SIGKILL [pid 5625] <... kill resumed>) = 0 [pid 5627] <... kill resumed>) = 0 [pid 5620] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5620] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5620] getdents64(3, 0x5555869e7790 /* 2 entries */, 32768) = 48 [pid 5620] getdents64(3, 0x5555869e7790 /* 0 entries */, 32768) = 0 [pid 5620] close(3) = 0 [pid 5622] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5622] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5622] getdents64(3, 0x5555869e7790 /* 2 entries */, 32768) = 48 [pid 5622] getdents64(3, 0x5555869e7790 /* 0 entries */, 32768) = 0 [pid 5622] close(3) = 0 [pid 5623] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5623] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5623] getdents64(3, 0x5555869e7790 /* 2 entries */, 32768) = 48 [pid 5623] getdents64(3, 0x5555869e7790 /* 0 entries */, 32768) = 0 [pid 5623] close(3) = 0 [pid 5627] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5627] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5627] getdents64(3, 0x5555869e7790 /* 2 entries */, 32768) = 48 [pid 5627] getdents64(3, 0x5555869e7790 /* 0 entries */, 32768) = 0 [pid 5627] close(3) = 0 [pid 5625] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5625] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5625] getdents64(3, 0x5555869e7790 /* 2 entries */, 32768) = 48 [pid 5625] getdents64(3, 0x5555869e7790 /* 0 entries */, 32768) = 0 [pid 5625] close(3) = 0 [pid 5621] <... write resumed>) = ? [pid 5621] +++ killed by SIGKILL +++ [pid 5620] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5621, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=6 /* 0.06 s */} --- [pid 5620] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5620] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5636 attached , child_tidptr=0x5555869e66d0) = 5636 [pid 5620] rt_sigprocmask(SIG_SETMASK, [] [pid 5636] set_robust_list(0x5555869e66e0, 24) = 0 [pid 5620] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5636] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5636] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5636] setpgid(0, 0) = 0 [pid 5636] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5636] write(3, "1000", 4) = 4 [pid 5636] close(3) = 0 executing program [pid 5636] write(1, "executing program\n", 18) = 18 [pid 5636] mkdirat(AT_FDCWD, "./sys", 0777) = -1 EEXIST (File exists) [pid 5636] mount(NULL, "./sys", "sysfs", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5636] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY) = 3 [pid 5636] write(3, "- - -", 5 [pid 5620] kill(-5636, SIGKILL) = 0 [pid 5620] kill(5636, SIGKILL) = 0 [pid 5620] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5620] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5620] getdents64(3, 0x5555869e7790 /* 2 entries */, 32768) = 48 [pid 5620] getdents64(3, 0x5555869e7790 /* 0 entries */, 32768) = 0 [pid 5620] close(3) = 0 [pid 5624] <... write resumed>) = ? [pid 5624] +++ killed by SIGKILL +++ [pid 5622] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5624, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=1 /* 0.01 s */} --- [pid 5622] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5622] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5637 attached , child_tidptr=0x5555869e66d0) = 5637 [pid 5622] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5637] set_robust_list(0x5555869e66e0, 24) = 0 [pid 5637] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5637] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5637] setpgid(0, 0) = 0 [pid 5637] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5637] write(3, "1000", 4) = 4 [pid 5637] close(3) = 0 executing program [pid 5637] write(1, "executing program\n", 18) = 18 [pid 5637] mkdirat(AT_FDCWD, "./sys", 0777) = -1 EEXIST (File exists) [pid 5637] mount(NULL, "./sys", "sysfs", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5637] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY) = 3 [pid 5637] write(3, "- - -", 5 [pid 5622] kill(-5637, SIGKILL) = 0 [pid 5622] kill(5637, SIGKILL) = 0 [pid 5622] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5622] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5622] getdents64(3, 0x5555869e7790 /* 2 entries */, 32768) = 48 [pid 5622] getdents64(3, 0x5555869e7790 /* 0 entries */, 32768) = 0 [pid 5622] close(3) = 0 [pid 5626] <... write resumed>) = ? [pid 5626] +++ killed by SIGKILL +++ [pid 5623] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5626, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=4 /* 0.04 s */} --- [pid 5623] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5623] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5644 attached , child_tidptr=0x5555869e66d0) = 5644 [pid 5644] set_robust_list(0x5555869e66e0, 24) = 0 [pid 5644] rt_sigprocmask(SIG_SETMASK, [] [pid 5623] rt_sigprocmask(SIG_SETMASK, [] [pid 5644] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5623] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5644] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5644] setpgid(0, 0) = 0 [pid 5644] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5644] write(3, "1000", 4) = 4 [pid 5644] close(3) = 0 [pid 5644] write(1, "executing program\n", 18) = 18 executing program [pid 5644] mkdirat(AT_FDCWD, "./sys", 0777) = -1 EEXIST (File exists) [pid 5644] mount(NULL, "./sys", "sysfs", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5644] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY) = 3 [pid 5644] write(3, "- - -", 5 [pid 5623] kill(-5644, SIGKILL) = 0 [pid 5623] kill(5644, SIGKILL) = 0 [pid 5623] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5623] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5623] getdents64(3, 0x5555869e7790 /* 2 entries */, 32768) = 48 [pid 5623] getdents64(3, 0x5555869e7790 /* 0 entries */, 32768) = 0 [pid 5623] close(3) = 0 [pid 5628] <... write resumed>) = ? [pid 5628] +++ killed by SIGKILL +++ [pid 5625] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5628, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- [pid 5625] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5625] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5645 attached , child_tidptr=0x5555869e66d0) = 5645 [pid 5645] set_robust_list(0x5555869e66e0, 24) = 0 [pid 5625] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5645] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5645] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5645] setpgid(0, 0) = 0 [pid 5645] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5645] write(3, "1000", 4) = 4 [pid 5645] close(3) = 0 executing program [pid 5645] write(1, "executing program\n", 18) = 18 [pid 5645] mkdirat(AT_FDCWD, "./sys", 0777) = -1 EEXIST (File exists) [pid 5645] mount(NULL, "./sys", "sysfs", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5645] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY) = 3 [pid 5645] write(3, "- - -", 5 [pid 5625] kill(-5645, SIGKILL) = 0 [pid 5625] kill(5645, SIGKILL) = 0 [pid 5625] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5625] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5625] getdents64(3, 0x5555869e7790 /* 2 entries */, 32768) = 48 [pid 5625] getdents64(3, 0x5555869e7790 /* 0 entries */, 32768) = 0 [pid 5625] close(3) = 0 [ 348.835324][ T38] INFO: task syz-executor806:5636 blocked for more than 143 seconds. [ 348.836316][ T38] Not tainted syzkaller #0 [ 348.836330][ T38] "echo 0 > /proc/sys/kerne ** replaying previous printk message ** [ 348.836330][ T38] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 348.836339][ T38] task:syz-executor806 state:D stack:27904 pid:5636 tgid:5636 ppid:5620 task_flags:0x400140 flags:0x00080002 [ 348.836448][ T38] Call Trace: [ 348.836499][ T38] [ 348.836551][ T38] __schedule+0x16d9/0x5700 [ 348.836740][ T38] ? __pfx___schedule+0x10/0x10 [ 348.836849][ T38] rt_mutex_schedule+0x76/0xf0 [ 348.836932][ T38] rt_mutex_slowlock_block+0x55e/0x690 [ 348.837081][ T38] rt_mutex_slowlock+0x2d4/0x780 [ 348.837225][ T38] ? rt_mutex_slowlock+0x1f2/0x780 [ 348.837322][ T38] ? __pfx_rt_mutex_slowlock+0x10/0x10 [ 348.837436][ T38] ? scsi_scan_host_selected+0x19f/0x6c0 [ 348.837528][ T38] ? scsi_scan_host_selected+0x19f/0x6c0 [ 348.837594][ T38] mutex_lock_nested+0x168/0x1d0 [ 348.837692][ T38] scsi_scan_host_selected+0x19f/0x6c0 [ 348.837765][ T38] ? __lock_acquire+0x6df/0x2e40 [ 348.837861][ T38] store_scan+0x4aa/0x540 [ 348.837937][ T38] ? __pfx_store_scan+0x10/0x10 [ 348.838035][ T38] ? lock_acquire+0x115/0x350 [ 348.838122][ T38] ? sysfs_file_kobj+0x1a/0x230 [ 348.838213][ T38] ? sysfs_break_active_protection+0x20/0xa0 [ 348.838308][ T38] ? sysfs_file_kobj+0x1a/0x230 [ 348.838359][ T38] ? sysfs_file_kobj+0x1a/0x230 [ 348.838421][ T38] ? sysfs_file_kobj+0x1e4/0x230 [ 348.838479][ T38] ? sysfs_kf_write+0x166/0x260 [ 348.838545][ T38] ? __pfx_sysfs_kf_write+0x10/0x10 [ 348.838599][ T38] kernfs_fop_write_iter+0x3a5/0x540 [ 348.838696][ T38] vfs_write+0x61e/0xbb0 [ 348.838791][ T38] ? __pfx_vfs_write+0x10/0x10 [ 348.838876][ T38] ? rt_spin_unlock+0x159/0x200 [ 348.838980][ T38] ? rt_spin_unlock+0x165/0x200 [ 348.839088][ T38] ksys_write+0x156/0x270 [ 348.839155][ T38] ? __pfx_ksys_write+0x10/0x10 [ 348.839258][ T38] do_syscall_64+0x166/0x520 [ 348.839325][ T38] ? trace_irq_disable+0x3b/0x140 [ 348.839413][ T38] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 348.839485][ T38] ? clear_bhb_loop+0x70/0xc0 [ 348.839559][ T38] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 348.839624][ T38] RIP: 0033:0x7fec469848b9 [ 348.839695][ T38] RSP: 002b:00007ffedcf71428 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 348.839759][ T38] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fec469848b9 [ 348.839800][ T38] RDX: 0000000000000005 RSI: 0000200000001400 RDI: 0000000000000003 [ 348.839841][ T38] RBP: 00000000000f4240 R08: 0000000000000009 R09: 0000000000000009 [ 348.839875][ T38] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000028181 [ 348.839916][ T38] R13: 00007ffedcf7143c R14: 00007ffedcf71450 R15: 00007ffedcf71440 [ 348.840005][ T38] [ 348.840056][ T38] [ 348.840056][ T38] Showing all locks held in the system: [ 348.840089][ T38] locks held by pr/ttyS0/17: 3, last CPU#1: [ 348.840141][ T38] #0: ffffffff8e09d578 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x30/0x60 [ 348.840316][ T38] #1: ffffffff99e991f8 (&port_lock_key){+.+.}-{3:3}, at: nbcon_kthread_func+0x64c/0x880 [ 348.840473][ T38] #2: ffffffff8e1c3ac0 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e2/0x400 [ 348.840654][ T38] locks held by khungtaskd/38: 1, last CPU#0: [ 348.840690][ T38] #0: ffffffff8e1c3ac0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 348.840888][ T38] locks held by kworker/u8:4/66: 2, on CPU#0: [ 348.840929][ T38] #0: ffff88813ff64138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 [ 348.841093][ T38] #1: ffffc9000151fc40 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 [ 348.841331][ T38] locks held by getty/5339: 2, on CPU#1: [ 348.841373][ T38] #0: ffff8880360e00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 348.841536][ T38] #1: ffffc900044ce2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 [ 348.841696][ T38] locks held by syz-executor806/5629: 4, on CPU#1: [ 348.841731][ T38] #0: ffff888034412510 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 [ 348.841886][ T38] #1: ffff888035f6c878 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 [ 348.842046][ T38] #2: ffff888027af1c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 [ 348.842258][ T38] #3: ffff88802642c110 (&shost->scan_mutex){+.+.}-{4:4}, at: scsi_scan_host_selected+0x19f/0x6c0 [ 348.842418][ T38] locks held by syz-executor806/5636: 4, on CPU#0: [ 348.842461][ T38] #0: ffff888034412510 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 [ 348.842615][ T38] #1: ffff888033f83c78 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 [ 348.842794][ T38] #2: ffff888027af1c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 [ 348.842978][ T38] #3: ffff88802642c110 (&shost->scan_mutex){+.+.}-{4:4}, at: scsi_scan_host_selected+0x19f/0x6c0 [ 348.843153][ T38] locks held by syz-executor806/5637: 4, on CPU#0: [ 348.843196][ T38] #0: ffff888034412510 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 [ 348.843363][ T38] #1: ffff888033f83878 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 [ 348.843533][ T38] #2: ffff888027af1c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 [ 348.843725][ T38] #3: ffff88802642c110 (&shost->scan_mutex){+.+.}-{4:4}, at: scsi_scan_host_selected+0x19f/0x6c0 [ 348.843885][ T38] locks held by syz-executor806/5644: 4, on CPU#0: [ 348.843929][ T38] #0: ffff888034412510 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 [ 348.844081][ T38] #1: ffff888033f82c78 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 [ 348.844243][ T38] #2: ffff888027af1c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 [ 348.844414][ T38] #3: ffff88802642c110 (&shost->scan_mutex){+.+.}-{4:4}, at: scsi_scan_host_selected+0x19f/0x6c0 [ 348.844550][ T38] locks held by syz-executor806/5645: 4, on CPU#0: [ 348.844565][ T38] #0: ffff888034412510 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 [ 348.844751][ T38] #1: ffff888033f82478 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 [ 348.844930][ T38] #2: ffff888027af1c38 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 [ 348.845355][ T38] #3: ffff88802642c110 (&shost->scan_mutex){+.+.}-{4:4}, at: scsi_scan_host_selected+0x19f/0x6c0 [ 348.845508][ T38] [ 348.845520][ T38] ============================================= [ 348.845520][ T38] [ 348.845559][ T38] NMI backtrace for cpu 0 [ 348.845613][ T38] CPU: 0 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} [ 348.845677][ T38] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 348.845710][ T38] Call Trace: [ 348.845733][ T38] [ 348.845762][ T38] dump_stack_lvl+0xe8/0x150 [ 348.845853][ T38] nmi_cpu_backtrace+0x274/0x2d0 [ 348.846013][ T38] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 348.846132][ T38] nmi_trigger_cpumask_backtrace+0x17d/0x390 [ 348.846241][ T38] sys_info+0x135/0x170 [ 348.846317][ T38] watchdog+0xfd7/0x1030 [ 348.846410][ T38] ? watchdog+0x1c7/0x1030 [ 348.846479][ T38] kthread+0x38b/0x470 [ 348.846509][ T38] ? __pfx_watchdog+0x10/0x10 [ 348.846568][ T38] ? __pfx_kthread+0x10/0x10 [ 348.846633][ T38] ret_from_fork+0x514/0xb70 [ 348.846691][ T38] ? __pfx_ret_from_fork+0x10/0x10 [ 348.846752][ T38] ? __switch_to+0xc89/0x1420 [ 348.846850][ T38] ? __pfx_kthread+0x10/0x10 [ 348.846908][ T38] ret_from_fork_asm+0x1a/0x30 [ 348.847041][ T38] [ 348.847104][ T38] Sending NMI from CPU 0 to CPUs 1: [ 348.847164][ C1] NMI backtrace for cpu 1 [ 348.847180][ C1] CPU: 1 UID: 0 PID: 17 Comm: pr/ttyS0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} [ 348.847213][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 348.847228][ C1] RIP: 0010:io_serial_in+0x77/0xc0 [ 348.847252][ C1] Code: e8 7e b1 65 fc 44 89 f9 d3 e3 49 83 ee 80 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 6f 6e d1 fc 41 03 1e 89 da ec <0f> b6 c0 5b 41 5c 41 5e 41 5f c3 cc cc cc cc cc 44 89 f9 80 e1 07 [ 348.847267][ C1] RSP: 0018:ffffc900001678b8 EFLAGS: 00000202 [ 348.847282][ C1] RAX: 1ffffffff33d3200 RBX: 00000000000003fd RCX: 0000000000000000 [ 348.847294][ C1] RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000000 [ 348.847305][ C1] RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 [ 348.847316][ C1] R10: dffffc0000000000 R11: ffffffff8560c7f0 R12: dffffc0000000000 [ 348.847336][ C1] R13: 0000000000000000 R14: ffffffff99e99220 R15: 0000000000000000 [ 348.847347][ C1] FS: 0000000000000000(0000) GS:ffff888125cd4000(0000) knlGS:0000000000000000 [ 348.847362][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 348.847374][ C1] CR2: 0000558776e06660 CR3: 0000000035eb2000 CR4: 00000000003526f0 [ 348.847391][ C1] Call Trace: [ 348.847397][ C1] [ 348.847405][ C1] wait_for_lsr+0x190/0x300 [ 348.847426][ C1] __serial8250_console_fifo_write+0xd0/0x3f0 [ 348.847455][ C1] serial8250_console_write+0xac5/0x1230 [ 348.847479][ C1] ? __pfx_serial8250_console_write+0x10/0x10 [ 348.847506][ C1] nbcon_emit_next_record+0xef5/0x1a90 [ 348.847538][ C1] ? __pfx_nbcon_emit_next_record+0x10/0x10 [ 348.847569][ C1] ? nbcon_context_try_acquire+0x819/0xbd0 [ 348.847603][ C1] nbcon_kthread_func+0x679/0x880 [ 348.847628][ C1] ? nbcon_kthread_func+0x163/0x880 [ 348.847650][ C1] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 348.847675][ C1] ? __kthread_parkme+0x71/0x1f0 [ 348.847702][ C1] ? __kthread_parkme+0x199/0x1f0 [ 348.847729][ C1] kthread+0x38b/0x470 [ 348.847745][ C1] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 348.847766][ C1] ? __pfx_kthread+0x10/0x10 [ 348.847783][ C1] ret_from_fork+0x514/0xb70 [ 348.847801][ C1] ? __pfx_ret_from_fork+0x10/0x10 [ 348.847818][ C1] ? __switch_to+0xc89/0x1420 [ 348.847844][ C1] ? __pfx_kthread+0x10/0x10 [ 348.847861][ C1] ret_from_fork_asm+0x1a/0x30 [ 348.847886][ C1] [ 348.854013][ T38] Kernel panic - not syncing: hung_task: blocked tasks [ 349.812822][ T38] CPU: 0 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} [ 349.822463][ T38] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 349.832524][ T38] Call Trace: [ 349.835812][ T38] [ 349.838773][ T38] vpanic+0x56d/0xa60 [ 349.842953][ T38] ? __pfx___schedule+0x10/0x10 [ 349.847865][ T38] ? __pfx_vpanic+0x10/0x10 [ 349.852401][ T38] panic+0xc5/0xd0 [ 349.856149][ T38] ? __pfx_panic+0x10/0x10 [ 349.860581][ T38] ? preempt_schedule_common+0x7f/0xd0 [ 349.866056][ T38] ? preempt_schedule_thunk+0x16/0x40 [ 349.871442][ T38] ? nmi_trigger_cpumask_backtrace+0x31a/0x390 [ 349.877612][ T38] ? nmi_trigger_cpumask_backtrace+0x31f/0x390 [ 349.883781][ T38] watchdog+0x1030/0x1030 [ 349.888132][ T38] ? watchdog+0x1c7/0x1030 [ 349.892563][ T38] kthread+0x38b/0x470 [ 349.896647][ T38] ? __pfx_watchdog+0x10/0x10 [ 349.901347][ T38] ? __pfx_kthread+0x10/0x10 [ 349.905969][ T38] ret_from_fork+0x514/0xb70 [ 349.910586][ T38] ? __pfx_ret_from_fork+0x10/0x10 [ 349.915712][ T38] ? __switch_to+0xc89/0x1420 [ 349.920408][ T38] ? __pfx_kthread+0x10/0x10 [ 349.925013][ T38] ret_from_fork_asm+0x1a/0x30 [ 349.929840][ T38] [ 349.933526][ T38] Kernel Offset: disabled [ 349.937908][ T38] Rebooting in 86400 seconds..