ci-upstream-kasan-gce-smack-root/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci-upstream-kasan-gce-smack-root/syz-executor1349424659 <...> Warning: Permanently added '10.128.0.84' (ED25519) to the list of known hosts. execve("ci-upstream-kasan-gce-smack-root/syz-executor1349424659", ["ci-upstream-kasan-gce-smack-root/syz-executor1349424659"], 0x7ffd75d823d0 /* 10 vars */) = 0 brk(NULL) = 0x555577199000 brk(0x555577199d80) = 0x555577199d80 arch_prctl(ARCH_SET_FS, 0x555577199400) = 0 set_tid_address(0x5555771996d0) = 5612 set_robust_list(0x5555771996e0, 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/ci-upstream-kasan-gce-smack-root/syz-executor1349424659", 4096) = 61 getrandom("\x40\x53\xd3\x7d\x40\x42\x8f\x0f", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555577199d80 brk(0x5555771bad80) = 0x5555771bad80 brk(0x5555771bb000) = 0x5555771bb000 mprotect(0x7fb9154fc000, 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|SIGCHLDci-upstream-kasan-gce-smack-root/strace-static-x86_64: Process 5613 attached [pid 5613] set_robust_list(0x5555771996e0, 24 [pid 5612] <... clone resumed>, child_tidptr=0x5555771996d0) = 5613 [pid 5613] <... set_robust_list resumed>) = 0 [pid 5613] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5612] rt_sigprocmask(SIG_SETMASK, [] [pid 5613] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5612] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5613] <... prctl resumed>) = 0 [pid 5613] setpgid(0, 0) = 0 [pid 5613] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5613] write(3, "1000", 4) = 4 [pid 5613] close(3) = 0 executing program [pid 5613] write(1, "executing program\n", 18) = 18 [pid 5613] mkdirat(AT_FDCWD, "./config", 0777) = 0 [pid 5613] mount(NULL, "./config", "configfs", 0, NULL) = 0 [pid 5613] mkdirat(AT_FDCWD, "./config/dlm/mycluster", 0777) = 0 [pid 5613] mkdirat(AT_FDCWD, "./config/dlm/mycluster/comms/1", 0777) = 0 [pid 5613] openat(AT_FDCWD, "./config/dlm/mycluster/comms/1/addr", O_WRONLY) = 3 [pid 5613] write(3, "\x02\x00\x00\x00\x7f\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 128) = 128 [pid 5613] openat(AT_FDCWD, "./config/dlm/mycluster/comms/1/local", O_WRONLY) = 4 [pid 5613] write(4, "\x31\x00", 2) = 2 [pid 5613] io_uring_setup(3840, {flags=0, sq_thread_cpu=0, sq_thread_idle=0, sq_entries=4096, cq_entries=8192, features=IORING_FEAT_SINGLE_MMAP|IORING_FEAT_NODROP|IORING_FEAT_SUBMIT_STABLE|IORING_FEAT_RW_CUR_POS|IORING_FEAT_CUR_PERSONALITY|IORING_FEAT_FAST_POLL|IORING_FEAT_POLL_32BITS|IORING_FEAT_SQPOLL_NONFIXED|IORING_FEAT_EXT_ARG|IORING_FEAT_NATIVE_WORKERS|IORING_FEAT_RSRC_TAGS|IORING_FEAT_CQE_SKIP|IORING_FEAT_LINKED_FILE|IORING_FEAT_REG_REG_RING|IORING_FEAT_RECVSEND_BUNDLE|IORING_FEAT_MIN_TIMEOUT|IORING_FEAT_RW_ATTR|IORING_FEAT_NO_IOWAIT, sq_off={head=0, tail=4, ring_mask=16, ring_entries=24, flags=36, dropped=32, array=131136, user_addr=0}, cq_off={head=8, tail=12, ring_mask=20, ring_entries=28, overflow=44, cqes=64, flags=40, user_addr=0}}) = 5 [pid 5613] mmap(NULL, 147520, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 5, 0) = 0x7fb915423000 [pid 5613] mmap(NULL, 262144, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 5, 0x10000000) = 0x7fb9153e3000 [pid 5613] openat(AT_FDCWD, "/dev/dlm-control", O_WRONLY) = 6 [pid 5613] io_uring_enter(5, 1, 0, 0, NULL, 0) = 1 [pid 5613] exit_group(0) = ? [ 100.986950][ T5614] dlm: Using TCP for communications [ 101.009449][ T5614] dlm: myls: joining the lockspace group... [pid 5612] kill(-5613, SIGKILL) = 0 [pid 5612] kill(5613, SIGKILL) = 0 [pid 5612] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5612] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5612] getdents64(3, 0x55557719a7a0 /* 2 entries */, 32768) = 48 [pid 5612] getdents64(3, 0x55557719a7a0 /* 0 entries */, 32768) = 0 [pid 5612] close(3) = 0 [ 286.784383][ T38] INFO: task iou-wrk-5613:5614 blocked for more than 143 seconds. [ 286.784427][ T38] Not tainted syzkaller #0 [ 286.784436][ T38] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.784443][ T38] task:iou-wrk-5613 state:D stack:25376 pid:5614 tgid:5613 ppid:5612 task_flags:0x404150 flags:0x00080006 [ 286.784506][ T38] Call Trace: [ 286.784512][ T38] [ 286.784525][ T38] __schedule+0x16dc/0x5500 [ 286.784578][ T38] ? _raw_spin_unlock_irqrestore+0x30/0x80 [ 286.784605][ T38] ? rt_mutex_slowunlock+0x4ee/0xa20 [ 286.784628][ T38] ? do_raw_spin_lock+0x12b/0x2f0 [ 286.784659][ T38] ? __pfx___schedule+0x10/0x10 [ 286.784686][ T38] ? schedule+0x90/0x2b0 [ 286.784708][ T38] schedule+0x164/0x2b0 [ 286.784730][ T38] do_uevent+0x2c3/0x570 [ 286.784753][ T38] ? __pfx_do_uevent+0x10/0x10 [ 286.784770][ T38] ? kfree+0x1c5/0x6c0 [ 286.784829][ T38] ? lockdep_hardirqs_on+0x7a/0x110 [ 286.784856][ T38] ? kobject_uevent_env+0x378/0x9e0 [ 286.784873][ T38] ? __pfx_autoremove_wake_function+0x10/0x10 [ 286.784903][ T38] ? kobject_uevent_env+0x378/0x9e0 [ 286.784926][ T38] __dlm_new_lockspace+0x1aa4/0x2060 [ 286.784946][ T38] ? __dlm_new_lockspace+0x273/0x2060 [ 286.784969][ T38] ? __pfx___dlm_new_lockspace+0x10/0x10 [ 286.784995][ T38] ? __pfx_autoremove_wake_function+0x10/0x10 [ 286.785020][ T38] ? cap_capable+0x123/0x460 [ 286.785038][ T38] ? safesetid_security_capable+0xa9/0x1a0 [ 286.785059][ T38] ? bpf_lsm_capable+0x9/0x20 [ 286.785076][ T38] ? security_capable+0x7e/0x2c0 [ 286.785097][ T38] ? dlm_new_user_lockspace+0x3e/0x80 [ 286.785119][ T38] device_create_lockspace+0xc7/0x350 [ 286.785145][ T38] ? __pfx_device_create_lockspace+0x10/0x10 [ 286.785169][ T38] ? _copy_from_user+0x94/0xb0 [ 286.785193][ T38] device_write+0x875/0xed0 [ 286.785216][ T38] loop_rw_iter+0x42f/0x6a0 [ 286.785251][ T38] io_write+0x11e6/0x1690 [ 286.785281][ T38] ? __pfx_io_write+0x10/0x10 [ 286.785331][ T38] __io_issue_sqe+0x188/0x4d0 [ 286.785357][ T38] io_issue_sqe+0x16d/0x1020 [ 286.785389][ T38] io_wq_submit_work+0x7b4/0xca0 [ 286.785415][ T38] io_worker_handle_work+0x72e/0x10e0 [ 286.785440][ T38] ? io_wq_worker+0x3de/0xf10 [ 286.785473][ T38] io_wq_worker+0x452/0xf10 [ 286.785509][ T38] ? io_wq_worker+0x37c/0xf10 [ 286.785531][ T38] ? __pfx_io_wq_worker+0x10/0x10 [ 286.785556][ T38] ? __pfx_rt_mutex_slowunlock+0x10/0x10 [ 286.785579][ T38] ? rt_spin_unlock+0x157/0x200 [ 286.785599][ T38] ? rt_spin_unlock+0x163/0x200 [ 286.785615][ T38] ? __pfx_io_wq_worker+0x10/0x10 [ 286.785643][ T38] ret_from_fork+0x514/0xb70 [ 286.785671][ T38] ? __pfx_ret_from_fork+0x10/0x10 [ 286.785696][ T38] ? __switch_to+0xc89/0x1420 [ 286.785720][ T38] ? __pfx_io_wq_worker+0x10/0x10 [ 286.785743][ T38] ret_from_fork_asm+0x1a/0x30 [ 286.785772][ T38] [ 286.785783][ T38] [ 286.785783][ T38] Showing all locks held in the system: [ 286.785795][ T38] 1 lock held by khungtaskd/38: [ 286.785803][ T38] #0: ffffffff8e1c3000 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.785847][ T38] 2 locks held by kworker/u8:3/55: [ 286.785856][ T38] #0: ffff88813ff5c138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 [ 286.785899][ T38] #1: ffffc9000121fc40 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 [ 286.785962][ T38] 2 locks held by getty/5353: [ 286.785970][ T38] #0: ffff88803570b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.786011][ T38] #1: ffffc90003cc32e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 [ 286.786047][ T38] 1 lock held by iou-wrk-5613/5614: [ 286.786055][ T38] #0: ffffffff99bcb458 (&ls_lock){+.+.}-{4:4}, at: __dlm_new_lockspace+0xa3/0x2060 [ 286.786095][ T38] 1 lock held by dlm_recoverd/5616: [ 286.786104][ T38] #0: ffff888037e6cd20 (&ls->ls_in_recovery){+.+.}-{4:4}, at: dlm_recoverd+0xba/0x23e0 [ 286.786142][ T38] [ 286.786146][ T38] ============================================= [ 286.786146][ T38] [ 286.786160][ T38] NMI backtrace for cpu 1 [ 286.786176][ T38] CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} [ 286.786197][ T38] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 286.786206][ T38] Call Trace: [ 286.786212][ T38] [ 286.786217][ T38] dump_stack_lvl+0xe8/0x150 [ 286.786242][ T38] nmi_cpu_backtrace+0x274/0x2d0 [ 286.786260][ T38] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.786287][ T38] nmi_trigger_cpumask_backtrace+0x17a/0x380 [ 286.786308][ T38] sys_info+0x135/0x170 [ 286.786322][ T38] watchdog+0xfd7/0x1030 [ 286.786343][ T38] ? watchdog+0x1c7/0x1030 [ 286.786362][ T38] kthread+0x388/0x470 [ 286.786393][ T38] ? __pfx_watchdog+0x10/0x10 [ 286.786406][ T38] ? __pfx_kthread+0x10/0x10 [ 286.786431][ T38] ret_from_fork+0x514/0xb70 [ 286.786459][ T38] ? __pfx_ret_from_fork+0x10/0x10 [ 286.786484][ T38] ? __switch_to+0xc89/0x1420 [ 286.786511][ T38] ? __pfx_kthread+0x10/0x10 [ 286.786536][ T38] ret_from_fork_asm+0x1a/0x30 [ 286.786562][ T38] [ 286.786571][ T38] Sending NMI from CPU 1 to CPUs 0: [ 286.786626][ C0] NMI backtrace for cpu 0 [ 286.786641][ C0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} [ 286.786661][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 286.786672][ C0] RIP: 0010:pv_native_safe_halt+0xf/0x20 [ 286.786699][ C0] Code: fb 6f 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 13 89 25 00 fb f4 0c cf 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 [ 286.786715][ C0] RSP: 0018:ffffffff8de07de0 EFLAGS: 00000246 [ 286.786730][ C0] RAX: 00000000000c6bc3 RBX: ffffffff819a2590 RCX: 0000000080000001 [ 286.786744][ C0] RDX: 0000000000000001 RSI: ffffffff8d88729a RDI: ffffffff8bca7880 [ 286.786756][ C0] RBP: ffffffff8de07eb8 R08: ffff8880b8633d5b R09: 1ffff110170c67ab [ 286.786770][ C0] R10: dffffc0000000000 R11: ffffed10170c67ac R12: 0000000000000000 [ 286.786783][ C0] R13: 1ffffffff1bdede8 R14: 1ffffffff1bc0fc4 R15: dffffc0000000000 [ 286.786797][ C0] FS: 0000000000000000(0000) GS:ffff888125c3e000(0000) knlGS:0000000000000000 [ 286.786812][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.786825][ C0] CR2: 000055e51bf42168 CR3: 000000000dfb0000 CR4: 00000000003526f0 [ 286.786843][ C0] Call Trace: [ 286.786849][ C0] [ 286.786855][ C0] default_idle+0x9/0x20 [ 286.786889][ C0] default_idle_call+0x72/0xb0 [ 286.786916][ C0] do_idle+0x2e0/0x540 [ 286.786938][ C0] ? __pfx_do_idle+0x10/0x10 [ 286.786963][ C0] cpu_startup_entry+0x43/0x60 [ 286.786983][ C0] rest_init+0x2de/0x300 [ 286.787001][ C0] start_kernel+0x392/0x3e0 [ 286.787038][ C0] x86_64_start_reservations+0x24/0x30 [ 286.787061][ C0] x86_64_start_kernel+0x137/0x1b0 [ 286.787083][ C0] common_startup_64+0x13e/0x157 [ 286.787115][ C0] [ 286.787628][ T38] Kernel panic - not syncing: hung_task: blocked tasks [ 286.787639][ T38] CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} [ 286.787657][ T38] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 286.787665][ T38] Call Trace: [ 286.787671][ T38] [ 286.787677][ T38] vpanic+0x56c/0xa60 [ 286.787696][ T38] ? __pfx_vpanic+0x10/0x10 [ 286.787718][ T38] panic+0xc5/0xd0 [ 286.787733][ T38] ? __pfx_panic+0x10/0x10 [ 286.787751][ T38] ? wq_watchdog_touch+0xf9/0x160 [ 286.787770][ T38] ? nmi_trigger_cpumask_backtrace+0x247/0x380 [ 286.787791][ T38] watchdog+0x1030/0x1030 [ 286.787811][ T38] ? watchdog+0x1c7/0x1030 [ 286.787831][ T38] kthread+0x388/0x470 [ 286.787856][ T38] ? __pfx_watchdog+0x10/0x10 [ 286.787869][ T38] ? __pfx_kthread+0x10/0x10 [ 286.787898][ T38] ret_from_fork+0x514/0xb70 [ 286.787925][ T38] ? __pfx_ret_from_fork+0x10/0x10 [ 286.787951][ T38] ? __switch_to+0xc89/0x1420 [ 286.787974][ T38] ? __pfx_kthread+0x10/0x10 [ 286.787999][ T38] ret_from_fork_asm+0x1a/0x30 [ 286.788026][ T38] [ 286.788650][ T38] Kernel Offset: disabled