./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1757651108 <...> Warning: Permanently added '10.128.0.88' (ED25519) to the list of known hosts. execve("./syz-executor1757651108", ["./syz-executor1757651108"], 0x7fff70492690 /* 10 vars */) = 0 brk(NULL) = 0x55557f92f000 brk(0x55557f92fd00) = 0x55557f92fd00 arch_prctl(ARCH_SET_FS, 0x55557f92f380) = 0 set_tid_address(0x55557f92f650) = 5846 set_robust_list(0x55557f92f660, 24) = 0 rseq(0x55557f92fca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1757651108", 4096) = 28 getrandom("\x63\xe3\x69\x8e\x9c\x33\x0e\x54", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557f92fd00 brk(0x55557f950d00) = 0x55557f950d00 brk(0x55557f951000) = 0x55557f951000 mprotect(0x7fa5f0762000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5848 attached , child_tidptr=0x55557f92f650) = 5848 [pid 5848] set_robust_list(0x55557f92f660, 24) = 0 [pid 5848] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5848] setpgid(0, 0) = 0 [pid 5848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5848] write(3, "1000", 4) = 4 [pid 5848] close(3) = 0 [pid 5848] write(1, "executing program\n", 18executing program ) = 18 [pid 5848] memfd_create("syzkaller", 0) = 3 [pid 5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa5e8200000 [pid 5848] write(3, "\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\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216 [pid 5848] munmap(0x7fa5e8200000, 138412032) = 0 [pid 5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5848] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5848] close(3) = 0 [pid 5848] close(4) = 0 [pid 5848] mkdir("./bus", 0777) = 0 [pid 5848] mount("/dev/loop0", "./bus", "jfs", 0, "") = 0 [ 122.761298][ T5848] loop0: detected capacity change from 0 to 32768 [pid 5848] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5848] chdir("./bus") = 0 [pid 5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5848] open(".", O_RDONLY) = 4 [pid 5848] mkdirat(4, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 000 [pid 5846] kill(-5848, SIGKILL) = 0 [pid 5846] kill(5848, SIGKILL) = 0 [pid 5846] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5846] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5846] getdents64(3, 0x55557f9306f0 /* 2 entries */, 32768) = 48 [pid 5846] getdents64(3, 0x55557f9306f0 /* 0 entries */, 32768) = 0 [pid 5846] close(3) = 0 [ 286.564774][ T30] INFO: task kworker/u8:4:62 blocked for more than 143 seconds. [ 286.572626][ T30] Not tainted 6.12.0-syzkaller #0 [ 286.578790][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.587939][ T30] task:kworker/u8:4 state:D stack:20728 pid:62 tgid:62 ppid:2 flags:0x00004000 [ 286.598383][ T30] Workqueue: writeback wb_workfn (flush-7:0) [ 286.604451][ T30] Call Trace: [ 286.608001][ T30] [ 286.610954][ T30] __schedule+0x17fa/0x4bd0 [ 286.615743][ T30] ? __pfx___schedule+0x10/0x10 [ 286.620629][ T30] ? __blk_flush_plug+0x449/0x500 [ 286.625939][ T30] ? __pfx_lock_release+0x10/0x10 [ 286.631001][ T30] ? __mutex_trylock_common+0x92/0x2e0 [ 286.636707][ T30] ? kthread_data+0x52/0xd0 [ 286.641237][ T30] ? schedule+0x90/0x320 [ 286.645764][ T30] ? wq_worker_sleeping+0x66/0x240 [ 286.650903][ T30] ? schedule+0x90/0x320 [ 286.655351][ T30] schedule+0x14b/0x320 [ 286.659532][ T30] schedule_preempt_disabled+0x13/0x30 [ 286.665235][ T30] __mutex_lock+0x6a7/0xd70 [ 286.669777][ T30] ? __mutex_lock+0x52a/0xd70 [ 286.674469][ T30] ? jfs_commit_inode+0x24a/0x590 [ 286.679787][ T30] ? __pfx___mutex_lock+0x10/0x10 [ 286.685042][ T30] jfs_commit_inode+0x24a/0x590 [ 286.689917][ T30] ? __pfx_jfs_commit_inode+0x10/0x10 [ 286.696000][ T30] ? do_raw_spin_unlock+0x13c/0x8b0 [ 286.701230][ T30] jfs_write_inode+0x143/0x220 [ 286.706293][ T30] __writeback_single_inode+0x711/0x10d0 [ 286.711955][ T30] writeback_sb_inodes+0x80c/0x1370 [ 286.717359][ T30] ? mark_lock+0x2ae/0x360 [ 286.721825][ T30] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 286.727734][ T30] ? __pfx___up_read+0x10/0x10 [ 286.732517][ T30] ? do_raw_spin_lock+0x14f/0x370 [ 286.737744][ T30] __writeback_inodes_wb+0x11b/0x260 [ 286.743055][ T30] wb_writeback+0x42f/0xbd0 [ 286.747812][ T30] ? queue_io+0x321/0x5a0 [ 286.752160][ T30] ? __pfx_wb_writeback+0x10/0x10 [ 286.757452][ T30] wb_workfn+0xc58/0x1090 [ 286.761825][ T30] ? __pfx_wb_workfn+0x10/0x10 [ 286.766858][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 286.772866][ T30] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 286.779458][ T30] ? process_scheduled_works+0x976/0x1850 [ 286.785395][ T30] process_scheduled_works+0xa63/0x1850 [ 286.790987][ T30] ? __pfx_process_scheduled_works+0x10/0x10 [ 286.797285][ T30] ? assign_work+0x364/0x3d0 [ 286.801907][ T30] worker_thread+0x870/0xd30 [ 286.806980][ T30] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 286.812900][ T30] ? __kthread_parkme+0x169/0x1d0 [ 286.818504][ T30] ? __pfx_worker_thread+0x10/0x10 [ 286.823641][ T30] kthread+0x2f0/0x390 [ 286.828095][ T30] ? __pfx_worker_thread+0x10/0x10 [ 286.833242][ T30] ? __pfx_kthread+0x10/0x10 [ 286.838279][ T30] ret_from_fork+0x4b/0x80 [ 286.842722][ T30] ? __pfx_kthread+0x10/0x10 [ 286.847562][ T30] ret_from_fork_asm+0x1a/0x30 [ 286.852362][ T30] [ 286.858259][ T30] [ 286.858259][ T30] Showing all locks held in the system: [ 286.866415][ T30] 1 lock held by khungtaskd/30: [ 286.871285][ T30] #0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 [ 286.881559][ T30] 4 locks held by kworker/u8:4/62: [ 286.886897][ T30] #0: ffff8880202cb948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 [ 286.898407][ T30] #1: ffffc900015d7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 [ 286.911137][ T30] #2: ffff88807e13e0e0 (&type->s_umount_key#44){.+.+}-{3:3}, at: super_trylock_shared+0x22/0xf0 [ 286.922098][ T30] #3: ffff888078bc9d70 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_commit_inode+0x24a/0x590 [ 286.933177][ T30] 2 locks held by getty/5593: [ 286.938123][ T30] #0: ffff8880313bd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.948161][ T30] #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 [ 286.958511][ T30] 4 locks held by syz-executor175/5848: [ 286.964067][ T30] [ 286.966696][ T30] ============================================= [ 286.966696][ T30] [ 286.975460][ T30] NMI backtrace for cpu 1 [ 286.979809][ T30] CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller #0 [ 286.988231][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 [ 286.998291][ T30] Call Trace: [ 287.001578][ T30] [ 287.004514][ T30] dump_stack_lvl+0x241/0x360 [ 287.009216][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.014426][ T30] ? __pfx__printk+0x10/0x10 [ 287.019041][ T30] nmi_cpu_backtrace+0x49c/0x4d0 [ 287.023997][ T30] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.029466][ T30] ? _printk+0xd5/0x120 [ 287.033630][ T30] ? __pfx__printk+0x10/0x10 [ 287.038232][ T30] ? __wake_up_klogd+0xcc/0x110 [ 287.043096][ T30] ? __pfx__printk+0x10/0x10 [ 287.047699][ T30] ? __rcu_read_unlock+0xa1/0x110 [ 287.052738][ T30] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.058730][ T30] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 287.064730][ T30] watchdog+0xff4/0x1040 [ 287.068984][ T30] ? watchdog+0x1ea/0x1040 [ 287.073418][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.078103][ T30] kthread+0x2f0/0x390 [ 287.082175][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.086869][ T30] ? __pfx_kthread+0x10/0x10 [ 287.091464][ T30] ret_from_fork+0x4b/0x80 [ 287.095893][ T30] ? __pfx_kthread+0x10/0x10 [ 287.100488][ T30] ret_from_fork_asm+0x1a/0x30 [ 287.105279][ T30] [ 287.108412][ T30] Sending NMI from CPU 1 to CPUs 0: [ 287.113645][ C0] NMI backtrace for cpu 0 [ 287.113657][ C0] CPU: 0 UID: 0 PID: 5848 Comm: syz-executor175 Not tainted 6.12.0-syzkaller #0 [ 287.113675][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 [ 287.113683][ C0] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x0/0x90 [ 287.113706][ C0] Code: 11 18 4c 89 44 11 20 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 4c 8b 04 24 65 48 8b 14 25 80 d7 03 00 65 8b 05 c0 ea [ 287.113722][ C0] RSP: 0018:ffffc90003f77498 EFLAGS: 00000293 [ 287.113737][ C0] RAX: ffffffff832b304e RBX: 0000000000000000 RCX: ffff88807e255a00 [ 287.113748][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ff [ 287.113758][ C0] RBP: ffffc90003f77690 R08: ffffffff832b3020 R09: 0000000000000000 [ 287.113768][ C0] R10: 00300065006c0069 R11: 006605ff00000020 R12: ffff88802646a000 [ 287.113779][ C0] R13: dffffc0000000000 R14: ffff888078bc9fd8 R15: 0000000000000000 [ 287.113790][ C0] FS: 000055557f92f380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 [ 287.113804][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.113815][ C0] CR2: 00007f1b662f3580 CR3: 0000000033ee0000 CR4: 00000000003526f0 [ 287.113829][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.113838][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.113848][ C0] Call Trace: [ 287.113854][ C0] [ 287.113860][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 287.113882][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 287.113904][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.113924][ C0] ? nmi_handle+0x2a/0x5a0 [ 287.113945][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 287.113963][ C0] ? nmi_handle+0x14f/0x5a0 [ 287.113978][ C0] ? nmi_handle+0x2a/0x5a0 [ 287.113993][ C0] ? __pfx___sanitizer_cov_trace_const_cmp1+0x10/0x10 [ 287.114011][ C0] ? default_do_nmi+0x63/0x160 [ 287.114026][ C0] ? exc_nmi+0x123/0x1f0 [ 287.114040][ C0] ? end_repeat_nmi+0xf/0x53 [ 287.114059][ C0] ? dtSplitRoot+0x8b0/0x1930 [ 287.114078][ C0] ? dtSplitRoot+0x8de/0x1930 [ 287.114097][ C0] ? __pfx___sanitizer_cov_trace_const_cmp1+0x10/0x10 [ 287.114116][ C0] ? __pfx___sanitizer_cov_trace_const_cmp1+0x10/0x10 [ 287.114135][ C0] ? __pfx___sanitizer_cov_trace_const_cmp1+0x10/0x10 [ 287.114153][ C0] [ 287.114158][ C0] [ 287.114163][ C0] dtSplitRoot+0x8b0/0x1930 [ 287.114193][ C0] ? __pfx_dtSplitRoot+0x10/0x10 [ 287.114213][ C0] ? __pfx_dbAlloc+0x10/0x10 [ 287.114230][ C0] ? __kasan_kmalloc+0x98/0xb0 [ 287.114249][ C0] ? dtInsert+0x857/0x6c10 [ 287.114266][ C0] ? __kmalloc_cache_noprof+0x19c/0x2c0 [ 287.114284][ C0] dtInsert+0x12cd/0x6c10 [ 287.114317][ C0] ? __pfx_dtInsert+0x10/0x10 [ 287.114336][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 287.114355][ C0] ? txLock+0x2b8/0x1f40 [ 287.114371][ C0] ? __pfx_lock_release+0x10/0x10 [ 287.114389][ C0] ? do_raw_spin_lock+0x14f/0x370 [ 287.114409][ C0] ? do_raw_spin_unlock+0x13c/0x8b0 [ 287.114443][ C0] ? dtInitRoot+0x234/0x6a0 [ 287.114468][ C0] jfs_mkdir+0x7fb/0xba0 [ 287.114486][ C0] ? __pfx_jfs_mkdir+0x10/0x10 [ 287.114510][ C0] ? generic_permission+0x1e0/0x550 [ 287.114529][ C0] ? bpf_lsm_inode_mkdir+0x9/0x10 [ 287.114547][ C0] ? security_inode_mkdir+0xbe/0x340 [ 287.114566][ C0] vfs_mkdir+0x2f9/0x4f0 [ 287.114587][ C0] do_mkdirat+0x264/0x3a0 [ 287.114611][ C0] ? __pfx_do_mkdirat+0x10/0x10 [ 287.114632][ C0] ? getname_flags+0x1e3/0x540 [ 287.114647][ C0] __x64_sys_mkdirat+0x87/0xa0 [ 287.114666][ C0] do_syscall_64+0xf3/0x230 [ 287.114684][ C0] ? clear_bhb_loop+0x35/0x90 [ 287.114701][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.114718][ C0] RIP: 0033:0x7fa5f06e9a99 [ 287.114736][ C0] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 287.114747][ C0] RSP: 002b:00007fff49a7cb88 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 287.114763][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa5f06e9a99 [ 287.114773][ C0] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000004 [ 287.114783][ C0] RBP: 00007fa5f07625f0 R08: 000055557f9304c0 R09: 000055557f9304c0 [ 287.114793][ C0] R10: 0000000000006152 R11: 0000000000000246 R12: 00007fff49a7cbb0 [ 287.114804][ C0] R13: 00007fff49a7cdd8 R14: 431bde82d7b634db R15: 00007fa5f073203b [ 287.114821][ C0] [ 287.114828][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.183 msecs [ 287.559229][ T30] Kernel panic - not syncing: hung_task: blocked tasks [ 287.566093][ T30] CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller #0 [ 287.574521][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 [ 287.584581][ T30] Call Trace: [ 287.587868][ T30] [ 287.590802][ T30] dump_stack_lvl+0x241/0x360 [ 287.595496][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.600706][ T30] ? __pfx__printk+0x10/0x10 [ 287.605305][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.611322][ T30] ? vscnprintf+0x5d/0x90 [ 287.615681][ T30] panic+0x349/0x880 [ 287.619590][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.625761][ T30] ? __pfx_panic+0x10/0x10 [ 287.630185][ T30] ? tick_nohz_tick_stopped+0x82/0xb0 [ 287.635575][ T30] ? __irq_work_queue_local+0x137/0x410 [ 287.641134][ T30] ? preempt_schedule_thunk+0x1a/0x30 [ 287.646515][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.652683][ T30] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 287.658852][ T30] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 287.665031][ T30] watchdog+0x1033/0x1040 [ 287.669375][ T30] ? watchdog+0x1ea/0x1040 [ 287.673809][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.678497][ T30] kthread+0x2f0/0x390 [ 287.682572][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.687255][ T30] ? __pfx_kthread+0x10/0x10 [ 287.691849][ T30] ret_from_fork+0x4b/0x80 [ 287.696280][ T30] ? __pfx_kthread+0x10/0x10 [ 287.700879][ T30] ret_from_fork_asm+0x1a/0x30 [ 287.705665][ T30] [ 287.708922][ T30] Kernel Offset: disabled [ 287.713238][ T30] Rebooting in 86400 seconds..