ci2-upstream-fs/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-upstream-fs/syz-executor1306325150 <...> Warning: Permanently added '10.128.1.78' (ED25519) to the list of known hosts. execve("ci2-upstream-fs/syz-executor1306325150", ["ci2-upstream-fs/syz-executor1306325150"], 0x7ffcfe2b2040 /* 10 vars */) = 0 brk(NULL) = 0x5555916c4000 brk(0x5555916c4d80) = 0x5555916c4d80 arch_prctl(ARCH_SET_FS, 0x5555916c4400) = 0 set_tid_address(0x5555916c46d0) = 5600 set_robust_list(0x5555916c46e0, 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-executor1306325150", 4096) = 44 getrandom("\xdd\x54\x7c\xb3\x0b\x8f\x9f\x78", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555916c4d80 brk(0x5555916e5d80) = 0x5555916e5d80 brk(0x5555916e6000) = 0x5555916e6000 mprotect(0x7fd6aec0a000, 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 5601 attached , child_tidptr=0x5555916c46d0) = 5601 [pid 5601] set_robust_list(0x5555916c46e0, 24) = 0 [pid 5601] rt_sigprocmask(SIG_SETMASK, [] [pid 5600] rt_sigprocmask(SIG_SETMASK, [] [pid 5601] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5600] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5600] openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "10000000000", 11) = 11 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "20", 2) = 2 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "1", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "0", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "0", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "1", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "100", 3) = 3 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "0", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "0", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "7 4 1 3", 7) = 7 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "1", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "1", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/sys/kernel/debug/failslab/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "Y", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/sys/kernel/debug/fail_page_alloc/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "Y", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/sys/kernel/debug/fail_futex/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "Y", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/sys/kernel/debug/fail_usercopy/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "Y", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/sys/kernel/debug/fail_make_request/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "Y", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/sys/kernel/debug/fail_io_timeout/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "Y", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/sys/kernel/debug/fail_iommufd/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "Y", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "0", 1) = 1 [pid 5600] close(3) = 0 [pid 5600] openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 [pid 5600] write(3, "5601", 4) = 4 [pid 5600] close(3) = 0 [pid 5600] kill(5601, SIGKILL) = 0 [pid 5601] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5601, 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 5602 attached , child_tidptr=0x5555916c46d0) = 5602 [pid 5602] set_robust_list(0x5555916c46e0, 24) = 0 [pid 5602] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5602] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5600] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5602] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5600] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5602] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5600] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5600] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5603 attached [pid 5603] set_robust_list(0x5555916c46e0, 24 [pid 5602] <... clone resumed>, child_tidptr=0x5555916c46d0) = 5603 ci2-upstream-fs/strace-static-x86_64: Process 5604 attached [pid 5600] <... clone resumed>, child_tidptr=0x5555916c46d0) = 5604 [pid 5604] set_robust_list(0x5555916c46e0, 24 [pid 5603] <... set_robust_list resumed>) = 0 [pid 5602] rt_sigprocmask(SIG_SETMASK, [] [pid 5600] rt_sigprocmask(SIG_SETMASK, [] [pid 5604] <... set_robust_list resumed>) = 0 [pid 5603] rt_sigprocmask(SIG_SETMASK, [] [pid 5602] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5600] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5600] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5604] rt_sigprocmask(SIG_SETMASK, [] [pid 5603] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5600] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5600] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5603] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5604] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5603] <... prctl resumed>) = 0 [pid 5603] setpgid(0, 0) = 0 ci2-upstream-fs/strace-static-x86_64: Process 5606 attached [pid 5604] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5600] <... clone resumed>, child_tidptr=0x5555916c46d0) = 5606 [pid 5604] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5603] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5600] rt_sigprocmask(SIG_SETMASK, [] [pid 5606] set_robust_list(0x5555916c46e0, 24 [pid 5604] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5603] <... openat resumed>) = 3 [pid 5603] write(3, "1000", 4 [pid 5606] <... set_robust_list resumed>) = 0 [pid 5600] <... rt_sigprocmask resumed>, NULL, 8) = 0 ci2-upstream-fs/strace-static-x86_64: Process 5607 attached [pid 5606] rt_sigprocmask(SIG_SETMASK, [] [pid 5604] <... clone resumed>, child_tidptr=0x5555916c46d0) = 5607 [pid 5603] <... write resumed>) = 4 [pid 5600] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5607] set_robust_list(0x5555916c46e0, 24 [pid 5604] rt_sigprocmask(SIG_SETMASK, [] [pid 5603] close(3 [pid 5600] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5607] <... set_robust_list resumed>) = 0 [pid 5606] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5604] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5603] <... close resumed>) = 0 [pid 5607] rt_sigprocmask(SIG_SETMASK, [] [pid 5606] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5603] write(1, "executing program\n", 18 [pid 5600] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5607] <... rt_sigprocmask resumed>, NULL, 8) = 0 executing program [pid 5606] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5603] <... write resumed>) = 18 ci2-upstream-fs/strace-static-x86_64: Process 5608 attached [pid 5607] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5606] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5608] set_robust_list(0x5555916c46e0, 24ci2-upstream-fs/strace-static-x86_64: Process 5609 attached [pid 5600] <... clone resumed>, child_tidptr=0x5555916c46d0) = 5608 [pid 5608] <... set_robust_list resumed>) = 0 [pid 5607] <... prctl resumed>) = 0 [pid 5603] mkdirat(AT_FDCWD, "./sys", 0777 [pid 5600] rt_sigprocmask(SIG_SETMASK, [] [pid 5609] set_robust_list(0x5555916c46e0, 24 [pid 5608] rt_sigprocmask(SIG_SETMASK, [] [pid 5607] setpgid(0, 0 [pid 5606] <... clone resumed>, child_tidptr=0x5555916c46d0) = 5609 [pid 5600] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5609] <... set_robust_list resumed>) = 0 [pid 5608] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5607] <... setpgid resumed>) = 0 [pid 5600] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5608] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5607] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5606] rt_sigprocmask(SIG_SETMASK, [] [pid 5600] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5609] rt_sigprocmask(SIG_SETMASK, [] [pid 5608] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5606] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5600] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5609] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5608] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5607] <... openat resumed>) = 3 [pid 5603] <... mkdirat resumed>) = 0 [pid 5603] mount(NULL, "./sys", "sysfs", 0, NULL [pid 5609] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5603] <... mount resumed>) = 0 [pid 5603] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLYci2-upstream-fs/strace-static-x86_64: Process 5611 attached ci2-upstream-fs/strace-static-x86_64: Process 5610 attached [pid 5609] <... prctl resumed>) = 0 [pid 5607] write(3, "1000", 4 [pid 5600] <... clone resumed>, child_tidptr=0x5555916c46d0) = 5611 [pid 5611] set_robust_list(0x5555916c46e0, 24 [pid 5610] set_robust_list(0x5555916c46e0, 24 [pid 5609] setpgid(0, 0 [pid 5608] <... clone resumed>, child_tidptr=0x5555916c46d0) = 5610 [pid 5607] <... write resumed>) = 4 [pid 5603] <... openat resumed>) = 3 [pid 5600] rt_sigprocmask(SIG_SETMASK, [] [pid 5611] <... set_robust_list resumed>) = 0 [pid 5610] <... set_robust_list resumed>) = 0 [pid 5609] <... setpgid resumed>) = 0 [pid 5608] rt_sigprocmask(SIG_SETMASK, [] [pid 5607] close(3 [pid 5603] write(3, "- - -", 5 [pid 5600] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5611] rt_sigprocmask(SIG_SETMASK, [] [pid 5610] rt_sigprocmask(SIG_SETMASK, [] [pid 5609] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5608] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5607] <... close resumed>) = 0 [pid 5611] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5610] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5609] <... openat resumed>) = 3 [pid 5607] write(1, "executing program\n", 18 executing program [pid 5611] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5607] <... write resumed>) = 18 [pid 5611] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5610] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5609] write(3, "1000", 4 [pid 5607] mkdirat(AT_FDCWD, "./sys", 0777 [pid 5611] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5610] <... prctl resumed>) = 0 [pid 5609] <... write resumed>) = 4 [pid 5607] <... mkdirat resumed>) = -1 EEXIST (File exists) [pid 5609] close(3) = 0 [pid 5607] mount(NULL, "./sys", "sysfs", 0, NULL [pid 5610] setpgid(0, 0 [pid 5609] write(1, "executing program\n", 18 [pid 5607] <... mount resumed>) = -1 EBUSY (Device or resource busy) [pid 5609] <... write resumed>) = 18 [pid 5610] <... setpgid resumed>) = 0 executing program [pid 5609] mkdirat(AT_FDCWD, "./sys", 0777 [pid 5610] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5609] <... mkdirat resumed>) = -1 EEXIST (File exists) [pid 5607] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLYci2-upstream-fs/strace-static-x86_64: Process 5612 attached [pid 5610] <... openat resumed>) = 3 [pid 5609] mount(NULL, "./sys", "sysfs", 0, NULL [pid 5607] <... openat resumed>) = 3 [pid 5611] <... clone resumed>, child_tidptr=0x5555916c46d0) = 5612 [pid 5609] <... mount resumed>) = -1 EBUSY (Device or resource busy) [pid 5612] set_robust_list(0x5555916c46e0, 24 [pid 5611] rt_sigprocmask(SIG_SETMASK, [] [pid 5610] write(3, "1000", 4 [pid 5607] write(3, "- - -", 5 [pid 5612] <... set_robust_list resumed>) = 0 [pid 5611] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5610] <... write resumed>) = 4 [pid 5609] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY [pid 5612] rt_sigprocmask(SIG_SETMASK, [] [pid 5610] close(3 [pid 5609] <... openat resumed>) = 3 [pid 5610] <... close resumed>) = 0 executing program [pid 5610] write(1, "executing program\n", 18 [pid 5612] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5610] <... write resumed>) = 18 [pid 5610] mkdirat(AT_FDCWD, "./sys", 0777 [pid 5609] write(3, "- - -", 5 [pid 5610] <... mkdirat resumed>) = -1 EEXIST (File exists) [pid 5610] mount(NULL, "./sys", "sysfs", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5610] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY [pid 5612] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5610] <... openat resumed>) = 3 [pid 5610] write(3, "- - -", 5 [pid 5612] setpgid(0, 0) = 0 [pid 5612] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5612] write(3, "1000", 4) = 4 [pid 5612] close(3) = 0 [pid 5612] write(1, "executing program\n", 18) = 18 [pid 5612] mkdirat(AT_FDCWD, "./sys", 0777) = -1 EEXIST (File exists) [pid 5612] mount(NULL, "./sys", "sysfs", 0, NULL) = -1 EBUSY (Device or resource busy) executing program [pid 5612] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY) = 3 [pid 5612] write(3, "- - -", 5 [pid 5602] kill(-5603, SIGKILL) = 0 [pid 5602] kill(5603, SIGKILL) = 0 [pid 5604] kill(-5607, SIGKILL) = 0 [pid 5604] kill(5607, SIGKILL) = 0 [pid 5606] kill(-5609, SIGKILL) = 0 [pid 5606] kill(5609, SIGKILL) = 0 [pid 5608] kill(-5610, SIGKILL) = 0 [pid 5608] kill(5610, SIGKILL) = 0 [pid 5611] kill(-5612, SIGKILL) = 0 [pid 5611] kill(5612, SIGKILL) = 0 [pid 5602] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5602] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5602] getdents64(3, 0x5555916c5790 /* 2 entries */, 32768) = 48 [pid 5602] getdents64(3, 0x5555916c5790 /* 0 entries */, 32768) = 0 [pid 5602] close(3) = 0 [pid 5604] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5604] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5604] getdents64(3, 0x5555916c5790 /* 2 entries */, 32768) = 48 [pid 5604] getdents64(3, 0x5555916c5790 /* 0 entries */, 32768) = 0 [pid 5604] close(3) = 0 [pid 5606] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5606] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5606] getdents64(3, 0x5555916c5790 /* 2 entries */, 32768) = 48 [pid 5606] getdents64(3, 0x5555916c5790 /* 0 entries */, 32768) = 0 [pid 5606] close(3) = 0 [pid 5608] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5608] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5608] getdents64(3, 0x5555916c5790 /* 2 entries */, 32768) = 48 [pid 5608] getdents64(3, 0x5555916c5790 /* 0 entries */, 32768) = 0 [pid 5608] close(3) = 0 [pid 5611] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5611] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5611] getdents64(3, 0x5555916c5790 /* 2 entries */, 32768) = 48 [pid 5611] getdents64(3, 0x5555916c5790 /* 0 entries */, 32768) = 0 [pid 5611] close(3) = 0 [pid 5603] <... write resumed>) = ? [pid 5603] +++ killed by SIGKILL +++ [pid 5602] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5603, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=5 /* 0.05 s */} --- [pid 5602] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5602] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5632 attached , child_tidptr=0x5555916c46d0) = 5632 [pid 5602] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5632] set_robust_list(0x5555916c46e0, 24) = 0 [pid 5632] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5632] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5632] setpgid(0, 0) = 0 [pid 5632] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5632] write(3, "1000", 4) = 4 [pid 5632] close(3) = 0 executing program [pid 5632] write(1, "executing program\n", 18) = 18 [pid 5632] mkdirat(AT_FDCWD, "./sys", 0777) = -1 EEXIST (File exists) [pid 5632] mount(NULL, "./sys", "sysfs", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5632] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY) = 3 [pid 5632] write(3, "- - -", 5 [pid 5602] kill(-5632, SIGKILL) = 0 [pid 5602] kill(5632, SIGKILL) = 0 [pid 5602] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5602] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5602] getdents64(3, 0x5555916c5790 /* 2 entries */, 32768) = 48 [pid 5602] getdents64(3, 0x5555916c5790 /* 0 entries */, 32768) = 0 [pid 5602] close(3) = 0 [pid 5607] <... write resumed>) = ? [pid 5607] +++ killed by SIGKILL +++ [pid 5604] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5607, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- [pid 5604] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5604] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5633 attached , child_tidptr=0x5555916c46d0) = 5633 [pid 5633] set_robust_list(0x5555916c46e0, 24) = 0 [pid 5633] rt_sigprocmask(SIG_SETMASK, [] [pid 5604] rt_sigprocmask(SIG_SETMASK, [] [pid 5633] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5604] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5633] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5633] setpgid(0, 0) = 0 [pid 5633] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5633] write(3, "1000", 4) = 4 [pid 5633] close(3) = 0 executing program [pid 5633] write(1, "executing program\n", 18) = 18 [pid 5633] mkdirat(AT_FDCWD, "./sys", 0777) = -1 EEXIST (File exists) [pid 5633] mount(NULL, "./sys", "sysfs", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5633] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY) = 3 [pid 5633] write(3, "- - -", 5 [pid 5604] kill(-5633, SIGKILL) = 0 [pid 5604] kill(5633, SIGKILL) = 0 [pid 5604] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5604] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5604] getdents64(3, 0x5555916c5790 /* 2 entries */, 32768) = 48 [pid 5604] getdents64(3, 0x5555916c5790 /* 0 entries */, 32768) = 0 [pid 5604] close(3) = 0 [pid 5609] <... write resumed>) = ? [pid 5609] +++ killed by SIGKILL +++ [pid 5606] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5609, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- [pid 5606] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5606] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5640 attached , child_tidptr=0x5555916c46d0) = 5640 [pid 5640] set_robust_list(0x5555916c46e0, 24) = 0 [pid 5640] rt_sigprocmask(SIG_SETMASK, [] [pid 5606] rt_sigprocmask(SIG_SETMASK, [] [pid 5640] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5606] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5640] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5640] setpgid(0, 0) = 0 [pid 5640] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5640] write(3, "1000", 4) = 4 [pid 5640] close(3) = 0 [pid 5640] write(1, "executing program\n", 18) = 18 executing program [pid 5640] mkdirat(AT_FDCWD, "./sys", 0777) = -1 EEXIST (File exists) [pid 5640] mount(NULL, "./sys", "sysfs", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5640] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY) = 3 [pid 5640] write(3, "- - -", 5 [pid 5606] kill(-5640, SIGKILL) = 0 [pid 5606] kill(5640, SIGKILL) = 0 [pid 5606] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5606] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5606] getdents64(3, 0x5555916c5790 /* 2 entries */, 32768) = 48 [pid 5606] getdents64(3, 0x5555916c5790 /* 0 entries */, 32768) = 0 [pid 5606] close(3) = 0 [pid 5610] <... write resumed>) = ? [pid 5610] +++ killed by SIGKILL +++ [pid 5608] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5610, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- [pid 5608] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5608] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci2-upstream-fs/strace-static-x86_64: Process 5641 attached , child_tidptr=0x5555916c46d0) = 5641 [pid 5641] set_robust_list(0x5555916c46e0, 24) = 0 [pid 5641] rt_sigprocmask(SIG_SETMASK, [] [pid 5608] rt_sigprocmask(SIG_SETMASK, [] [pid 5641] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5608] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5641] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5641] setpgid(0, 0) = 0 [pid 5641] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5641] write(3, "1000", 4) = 4 [pid 5641] close(3) = 0 [pid 5641] write(1, "executing program\n", 18) = 18 executing program [pid 5641] mkdirat(AT_FDCWD, "./sys", 0777) = -1 EEXIST (File exists) [pid 5641] mount(NULL, "./sys", "sysfs", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5641] openat(AT_FDCWD, "./sys/class/scsi_host/host0/scan", O_WRONLY) = 3 [pid 5641] write(3, "- - -", 5 [pid 5608] kill(-5641, SIGKILL) = 0 [pid 5608] kill(5641, SIGKILL) = 0 [pid 5608] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5608] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5608] getdents64(3, 0x5555916c5790 /* 2 entries */, 32768) = 48 [pid 5608] getdents64(3, 0x5555916c5790 /* 0 entries */, 32768) = 0 [pid 5608] close(3) = 0 [ 276.914692][ T38] INFO: task syz-executor130:5632 blocked f ** replaying previous printk message ** [ 276.914692][ T38] INFO: task syz-executor130:5632 blocked for more than 143 seconds. [ 276.915521][ T38] Not tainted syzkaller #0 [ 276.915536][ T38] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 276.915545][ T38] task:syz-executor130 state:D stack:27880 pid:5632 tgid:5632 ppid:5602 task_flags:0x400140 flags:0x00080002 [ 276.915600][ T38] Call Trace: [ 276.915608][ T38] [ 276.915622][ T38] __schedule+0x16d9/0x5700 [ 276.915715][ T38] ? __pfx___schedule+0x10/0x10 [ 276.915751][ T38] rt_mutex_schedule+0x76/0xf0 [ 276.915775][ T38] rt_mutex_slowlock_block+0x55e/0x690 [ 276.915816][ T38] rt_mutex_slowlock+0x2d4/0x780 [ 276.915844][ T38] ? rt_mutex_slowlock+0x1f2/0x780 [ 276.915870][ T38] ? __pfx_rt_mutex_slowlock+0x10/0x10 [ 276.915911][ T38] ? scsi_scan_host_selected+0x19f/0x6c0 [ 276.915945][ T38] ? scsi_scan_host_selected+0x19f/0x6c0 [ 276.915963][ T38] mutex_lock_nested+0x168/0x1d0 [ 276.916010][ T38] scsi_scan_host_selected+0x19f/0x6c0 [ 276.916034][ T38] ? __lock_acquire+0x6df/0x2e40 [ 276.916064][ T38] store_scan+0x4aa/0x540 [ 276.916089][ T38] ? __pfx_store_scan+0x10/0x10 [ 276.916115][ T38] ? lock_acquire+0x115/0x350 [ 276.916138][ T38] ? sysfs_file_kobj+0x1a/0x230 [ 276.916163][ T38] ? sysfs_unbreak_active_protection+0x20/0x40 [ 276.916191][ T38] ? sysfs_file_kobj+0x1a/0x230 [ 276.916207][ T38] ? sysfs_file_kobj+0x1a/0x230 [ 276.916225][ T38] ? sysfs_file_kobj+0x1e4/0x230 [ 276.916244][ T38] ? sysfs_kf_write+0x166/0x260 [ 276.916266][ T38] ? __pfx_sysfs_kf_write+0x10/0x10 [ 276.916283][ T38] kernfs_fop_write_iter+0x3a5/0x540 [ 276.916314][ T38] vfs_write+0x61e/0xbb0 [ 276.916344][ T38] ? __pfx_vfs_write+0x10/0x10 [ 276.916368][ T38] ? rt_spin_unlock+0x159/0x200 [ 276.916397][ T38] ? rt_spin_unlock+0x165/0x200 [ 276.916432][ T38] ksys_write+0x156/0x270 [ 276.916455][ T38] ? __pfx_ksys_write+0x10/0x10 [ 276.916487][ T38] do_syscall_64+0x166/0x520 [ 276.916508][ T38] ? trace_irq_disable+0x3b/0x140 [ 276.916529][ T38] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 276.916548][ T38] ? clear_bhb_loop+0x70/0xc0 [ 276.916571][ T38] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 276.916590][ T38] RIP: 0033:0x7fd6aeb778b9 [ 276.916608][ T38] RSP: 002b:00007fffaaf9a918 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 276.916628][ T38] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd6aeb778b9 [ 276.916642][ T38] RDX: 0000000000000005 RSI: 0000200000001400 RDI: 0000000000000003 [ 276.916654][ T38] RBP: 00000000000f4240 R08: 0000000000000009 R09: 0000000000000009 [ 276.916666][ T38] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000016a2c [ 276.916678][ T38] R13: 00007fffaaf9a92c R14: 00007fffaaf9a940 R15: 00007fffaaf9a930 [ 276.916716][ T38] [ 276.916752][ T38] [ 276.916752][ T38] Showing all locks held in the system: [ 276.916761][ T38] locks held by pr/ttyS0/17: 5, last CPU#1: [ 276.916776][ T38] #0: ffffffff8e09d578 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x30/0x60 [ 276.916829][ T38] #1: ffffffff99e991f8 (&port_lock_key){+.+.}-{3:3}, at: nbcon_kthread_func+0x64c/0x880 [ 276.916878][ T38] #2: ffffffff8e1c3ac0 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e2/0x400 [ 276.916962][ T38] #3: ffff8880b873c320 (&rq->__lock){-...}-{2:2}, at: finish_task_switch+0x159/0xc60 [ 276.917009][ T38] #4: ffff8880b8728558 (hrtimer_bases.lock){-...}-{2:2}, at: hrtimer_start_range_ns+0x8c/0x3f0 [ 276.917065][ T38] locks held by khungtaskd/38: 1, last CPU#0: [ 276.917078][ T38] #0: ffffffff8e1c3ac0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 276.917145][ T38] locks held by getty/5337: 2, on CPU#0: [ 276.917158][ T38] #0: ffff8880358a30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 276.917211][ T38] #1: ffffc900044cb2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 [ 276.917259][ T38] locks held by syz-executor130/5612: 7, on CPU#1: [ 276.917271][ T38] #0: ffff8880367e2510 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 [ 276.917322][ T38] #1: ffff88803239a478 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 [ 276.917372][ T38] #2: ffff8880280d9d28 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 [ 276.917428][ T38] #3: ffff888027738110 (&shost->scan_mutex){+.+.}-{4:4}, at: scsi_scan_host_selected+0x19f/0x6c0 [ 276.917474][ T38] #4: ffff888027738330 (&set->tag_list_lock){+.+.}-{4:4}, at: blk_mq_init_allocated_queue+0x104a/0x1400 [ 276.917528][ T38] #5: ffff8880253b3cf0 (&q->q_usage_counter(io)#67){++++}-{0:0}, at: blk_mq_init_allocated_queue+0x10ef/0x1400 [ 276.917585][ T38] #6: ffff8880253b3d28 (&q->q_usage_counter(queue)#50){++++}-{0:0}, at: blk_mq_init_allocated_queue+0x10ef/0x1400 [ 276.917643][ T38] locks held by syz-executor130/5632: 4, on CPU#1: [ 276.917656][ T38] #0: ffff8880367e2510 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 [ 276.917713][ T38] #1: ffff888034826478 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 [ 276.917764][ T38] #2: ffff8880280d9d28 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 [ 276.917818][ T38] #3: ffff888027738110 (&shost->scan_mutex){+.+.}-{4:4}, at: scsi_scan_host_selected+0x19f/0x6c0 [ 276.917865][ T38] locks held by syz-executor130/5633: 4, on CPU#1: [ 276.917878][ T38] #0: ffff8880367e2510 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 [ 276.917927][ T38] #1: ffff888034825c78 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 [ 276.917976][ T38] #2: ffff8880280d9d28 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 [ 276.918031][ T38] #3: ffff888027738110 (&shost->scan_mutex){+.+.}-{4:4}, at: scsi_scan_host_selected+0x19f/0x6c0 [ 276.918077][ T38] locks held by syz-executor130/5640: 4, on CPU#0: [ 276.918090][ T38] #0: ffff8880367e2510 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 [ 276.918139][ T38] #1: ffff888034825478 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 [ 276.918189][ T38] #2: ffff8880280d9d28 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 [ 276.918244][ T38] #3: ffff888027738110 (&shost->scan_mutex){+.+.}-{4:4}, at: scsi_scan_host_selected+0x19f/0x6c0 [ 276.918290][ T38] locks held by syz-executor130/5641: 4, on CPU#1: [ 276.918302][ T38] #0: ffff8880367e2510 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 [ 276.918352][ T38] #1: ffff888034824078 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 [ 276.918403][ T38] #2: ffff8880280d9d28 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 [ 276.918459][ T38] #3: ffff888027738110 (&shost->scan_mutex){+.+.}-{4:4}, at: scsi_scan_host_selected+0x19f/0x6c0 [ 276.918507][ T38] [ 276.918512][ T38] ============================================= [ 276.918512][ T38] [ 276.918520][ T38] NMI backtrace for cpu 0 [ 276.918534][ T38] CPU: 0 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} [ 276.918553][ T38] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 276.918563][ T38] Call Trace: [ 276.918571][ T38] [ 276.918578][ T38] dump_stack_lvl+0xe8/0x150 [ 276.918605][ T38] nmi_cpu_backtrace+0x274/0x2d0 [ 276.918631][ T38] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 276.918661][ T38] nmi_trigger_cpumask_backtrace+0x17d/0x390 [ 276.918689][ T38] sys_info+0x135/0x170 [ 276.918719][ T38] watchdog+0xfd7/0x1030 [ 276.918748][ T38] ? watchdog+0x1c7/0x1030 [ 276.918776][ T38] kthread+0x38b/0x470 [ 276.918796][ T38] ? __pfx_watchdog+0x10/0x10 [ 276.918816][ T38] ? __pfx_kthread+0x10/0x10 [ 276.918835][ T38] ret_from_fork+0x514/0xb70 [ 276.918857][ T38] ? __pfx_ret_from_fork+0x10/0x10 [ 276.918875][ T38] ? __switch_to+0xc89/0x1420 [ 276.918902][ T38] ? __pfx_kthread+0x10/0x10 [ 276.918922][ T38] ret_from_fork_asm+0x1a/0x30 [ 276.918954][ T38] [ 276.918961][ T38] Sending NMI from CPU 0 to CPUs 1: [ 276.918990][ C1] NMI backtrace for cpu 1 [ 276.919004][ C1] CPU: 1 UID: 0 PID: 17 Comm: pr/ttyS0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} [ 276.919023][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 276.919032][ C1] RIP: 0010:io_serial_in+0x77/0xc0 [ 276.919053][ C1] Code: e8 3e b8 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 7f 70 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 [ 276.919066][ C1] RSP: 0018:ffffc900001678b8 EFLAGS: 00000202 [ 276.919081][ C1] RAX: 1ffffffff33d3200 RBX: 00000000000003fd RCX: 0000000000000000 [ 276.919092][ C1] RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000000 [ 276.919102][ C1] RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 [ 276.919113][ C1] R10: dffffc0000000000 R11: ffffffff8560c130 R12: dffffc0000000000 [ 276.919124][ C1] R13: 0000000000000000 R14: ffffffff99e99220 R15: 0000000000000000 [ 276.919135][ C1] FS: 0000000000000000(0000) GS:ffff888125cd4000(0000) knlGS:0000000000000000 [ 276.919148][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 276.919160][ C1] CR2: 000055c5307aa660 CR3: 000000004275c000 CR4: 00000000003526f0 [ 276.919176][ C1] Call Trace: [ 276.919182][ C1] [ 276.919190][ C1] wait_for_lsr+0x190/0x300 [ 276.919217][ C1] __serial8250_console_fifo_write+0xd0/0x3f0 [ 276.919241][ C1] serial8250_console_write+0xac5/0x1230 [ 276.919263][ C1] ? __pfx_serial8250_console_write+0x10/0x10 [ 276.919286][ C1] nbcon_emit_next_record+0xef5/0x1a90 [ 276.919313][ C1] ? __pfx_nbcon_emit_next_record+0x10/0x10 [ 276.919336][ C1] ? nbcon_context_try_acquire+0x819/0xbd0 [ 276.919364][ C1] nbcon_kthread_func+0x679/0x880 [ 276.919387][ C1] ? nbcon_kthread_func+0x163/0x880 [ 276.919405][ C1] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 276.919428][ C1] ? __kthread_parkme+0x71/0x1f0 [ 276.919450][ C1] ? __kthread_parkme+0x199/0x1f0 [ 276.919473][ C1] kthread+0x38b/0x470 [ 276.919489][ C1] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 276.919507][ C1] ? __pfx_kthread+0x10/0x10 [ 276.919523][ C1] ret_from_fork+0x514/0xb70 [ 276.919539][ C1] ? __pfx_ret_from_fork+0x10/0x10 [ 276.919554][ C1] ? __switch_to+0xc89/0x1420 [ 276.919576][ C1] ? __pfx_kthread+0x10/0x10 [ 276.919592][ C1] ret_from_fork_asm+0x1a/0x30 [ 276.919614][ C1] [ 276.919983][ T38] Kernel panic - not syncing: hung_task: blocked tasks [ 277.913713][ T38] CPU: 0 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} [ 277.923332][ T38] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 277.933379][ T38] Call Trace: [ 277.936655][ T38] [ 277.939594][ T38] vpanic+0x56d/0xa60 [ 277.943571][ T38] ? __pfx_vpanic+0x10/0x10 [ 277.948077][ T38] ? console_srcu_read_unlock+0x3a/0x60 [ 277.953649][ T38] panic+0xc5/0xd0 [ 277.957362][ T38] ? __pfx_panic+0x10/0x10 [ 277.961773][ T38] ? wq_watchdog_touch+0xf9/0x160 [ 277.966789][ T38] ? nmi_trigger_cpumask_backtrace+0x24d/0x390 [ 277.972946][ T38] watchdog+0x1030/0x1030 [ 277.977273][ T38] ? watchdog+0x1c7/0x1030 [ 277.981688][ T38] kthread+0x38b/0x470 [ 277.985748][ T38] ? __pfx_watchdog+0x10/0x10 [ 277.990416][ T38] ? __pfx_kthread+0x10/0x10 [ 277.994999][ T38] ret_from_fork+0x514/0xb70 [ 277.999597][ T38] ? __pfx_ret_from_fork+0x10/0x10 [ 278.004697][ T38] ? __switch_to+0xc89/0x1420 [ 278.009370][ T38] ? __pfx_kthread+0x10/0x10 [ 278.013950][ T38] ret_from_fork_asm+0x1a/0x30 [ 278.018712][ T38] [ 278.021872][ T38] Kernel Offset: disabled [ 278.026189][ T38] Rebooting in 86400 seconds..