./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor447668039 <...> Warning: Permanently added '10.128.1.194' (ED25519) to the list of known hosts. execve("./syz-executor447668039", ["./syz-executor447668039"], 0x7fff15d2cc30 /* 10 vars */) = 0 brk(NULL) = 0x555562b2c000 brk(0x555562b2cd00) = 0x555562b2cd00 arch_prctl(ARCH_SET_FS, 0x555562b2c380) = 0 set_tid_address(0x555562b2c650) = 5850 set_robust_list(0x555562b2c660, 24) = 0 rseq(0x555562b2cca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor447668039", 4096) = 27 getrandom("\x8b\xdb\xe3\x4f\x4d\xb6\x2b\xb1", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555562b2cd00 brk(0x555562b4dd00) = 0x555562b4dd00 brk(0x555562b4e000) = 0x555562b4e000 mprotect(0x7fb8d7709000, 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 5852 attached , child_tidptr=0x555562b2c650) = 5852 [pid 5852] set_robust_list(0x555562b2c660, 24) = 0 [pid 5852] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5852] setpgid(0, 0) = 0 [pid 5852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5852] write(3, "1000", 4) = 4 [pid 5852] close(3) = 0 [pid 5852] write(1, "executing program\n", 18executing program ) = 18 [pid 5852] memfd_create("syzkaller", 0) = 3 [pid 5852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb8cf200000 [pid 5852] 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 5852] munmap(0x7fb8cf200000, 138412032) = 0 [pid 5852] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5852] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5852] close(3) = 0 [pid 5852] close(4) = 0 [pid 5852] mkdir("./bus", 0777) = 0 [pid 5852] mount("/dev/loop0", "./bus", "jfs", 0, "") = 0 [pid 5852] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5852] chdir("./bus") = 0 [pid 5852] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 265.506340][ T5852] loop0: detected capacity change from 0 to 32768 [pid 5852] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000 [pid 5850] kill(-5852, SIGKILL) = 0 [pid 5850] kill(5852, SIGKILL) = 0 [pid 5850] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5850] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5850] getdents64(3, 0x555562b2d6f0 /* 2 entries */, 32768) = 48 [pid 5850] getdents64(3, 0x555562b2d6f0 /* 0 entries */, 32768) = 0 [pid 5850] close(3) = 0 [ 430.003932][ T30] INFO: task kworker/u8:5:1086 blocked for more than 143 seconds. [ 430.011912][ T30] Not tainted 6.12.0-rc6-syzkaller-00077-g2e1b3cc9d7f7 #0 [ 430.020426][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 430.029758][ T30] task:kworker/u8:5 state:D stack:23920 pid:1086 tgid:1086 ppid:2 flags:0x00004000 [ 430.040347][ T30] Workqueue: writeback wb_workfn (flush-7:0) [ 430.046762][ T30] Call Trace: [ 430.050083][ T30] [ 430.053035][ T30] __schedule+0x17fa/0x4bd0 [ 430.058168][ T30] ? __pfx___schedule+0x10/0x10 [ 430.063051][ T30] ? __blk_flush_plug+0x449/0x500 [ 430.068644][ T30] ? __pfx_lock_release+0x10/0x10 [ 430.073719][ T30] ? __mutex_trylock_common+0x92/0x2e0 [ 430.079647][ T30] ? kthread_data+0x52/0xd0 [ 430.084479][ T30] ? schedule+0x90/0x320 [ 430.088746][ T30] ? wq_worker_sleeping+0x66/0x240 [ 430.094235][ T30] ? schedule+0x90/0x320 [ 430.098500][ T30] schedule+0x14b/0x320 [ 430.102699][ T30] schedule_preempt_disabled+0x13/0x30 [ 430.108752][ T30] __mutex_lock+0x6a7/0xd70 [ 430.113280][ T30] ? __mutex_lock+0x52a/0xd70 [ 430.118331][ T30] ? jfs_commit_inode+0x24a/0x590 [ 430.123381][ T30] ? __pfx___mutex_lock+0x10/0x10 [ 430.128871][ T30] jfs_commit_inode+0x24a/0x590 [ 430.134486][ T30] ? __pfx_jfs_commit_inode+0x10/0x10 [ 430.139893][ T30] ? do_raw_spin_unlock+0x13c/0x8b0 [ 430.145561][ T30] jfs_write_inode+0x143/0x220 [ 430.150438][ T30] __writeback_single_inode+0x711/0x10d0 [ 430.156434][ T30] writeback_sb_inodes+0x80c/0x1370 [ 430.161654][ T30] ? mark_lock+0x2ae/0x360 [ 430.166516][ T30] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 430.172213][ T30] ? __pfx___up_read+0x10/0x10 [ 430.177205][ T30] ? do_raw_spin_lock+0x14f/0x370 [ 430.182257][ T30] __writeback_inodes_wb+0x11b/0x260 [ 430.188081][ T30] wb_writeback+0x42f/0xbd0 [ 430.192621][ T30] ? queue_io+0x3a1/0x5a0 [ 430.197285][ T30] ? __pfx_wb_writeback+0x10/0x10 [ 430.202471][ T30] wb_workfn+0xc58/0x1090 [ 430.207309][ T30] ? __pfx_wb_workfn+0x10/0x10 [ 430.212111][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 430.218708][ T30] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 430.225374][ T30] ? process_scheduled_works+0x976/0x1850 [ 430.231204][ T30] process_scheduled_works+0xa63/0x1850 [ 430.237151][ T30] ? __pfx_process_scheduled_works+0x10/0x10 [ 430.243160][ T30] ? assign_work+0x364/0x3d0 [ 430.248667][ T30] worker_thread+0x870/0xd30 [ 430.253331][ T30] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 430.259621][ T30] ? __kthread_parkme+0x169/0x1d0 [ 430.264942][ T30] ? __pfx_worker_thread+0x10/0x10 [ 430.270076][ T30] kthread+0x2f0/0x390 [ 430.274504][ T30] ? __pfx_worker_thread+0x10/0x10 [ 430.279642][ T30] ? __pfx_kthread+0x10/0x10 [ 430.284691][ T30] ret_from_fork+0x4b/0x80 [ 430.289130][ T30] ? __pfx_kthread+0x10/0x10 [ 430.294080][ T30] ret_from_fork_asm+0x1a/0x30 [ 430.298909][ T30] [ 430.302133][ T30] [ 430.302133][ T30] Showing all locks held in the system: [ 430.310223][ T30] 1 lock held by khungtaskd/30: [ 430.315545][ T30] #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 [ 430.325728][ T30] 4 locks held by kworker/u8:5/1086: [ 430.331027][ T30] #0: ffff8881416cb148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 [ 430.342690][ T30] #1: ffffc90004e17d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 [ 430.356027][ T30] #2: ffff88807b26e0e0 (&type->s_umount_key#44){.+.+}-{3:3}, at: super_trylock_shared+0x22/0xf0 [ 430.366861][ T30] #3: ffff888077bf8b00 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_commit_inode+0x24a/0x590 [ 430.377498][ T30] 2 locks held by getty/5596: [ 430.382187][ T30] #0: ffff888034b4a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.392330][ T30] #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 [ 430.402700][ T30] 4 locks held by syz-executor447/5852: [ 430.408474][ T30] [ 430.410807][ T30] ============================================= [ 430.410807][ T30] [ 430.419762][ T30] NMI backtrace for cpu 1 [ 430.424112][ T30] CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc6-syzkaller-00077-g2e1b3cc9d7f7 #0 [ 430.434619][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 430.444678][ T30] Call Trace: [ 430.447965][ T30] [ 430.450899][ T30] dump_stack_lvl+0x241/0x360 [ 430.455596][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.460803][ T30] ? __pfx__printk+0x10/0x10 [ 430.465420][ T30] nmi_cpu_backtrace+0x49c/0x4d0 [ 430.470375][ T30] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.475845][ T30] ? _printk+0xd5/0x120 [ 430.480052][ T30] ? __pfx__printk+0x10/0x10 [ 430.484657][ T30] ? __wake_up_klogd+0xcc/0x110 [ 430.489519][ T30] ? __pfx__printk+0x10/0x10 [ 430.494132][ T30] ? __rcu_read_unlock+0xa1/0x110 [ 430.499169][ T30] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.505176][ T30] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 430.511171][ T30] watchdog+0xff4/0x1040 [ 430.515448][ T30] ? watchdog+0x1ea/0x1040 [ 430.519879][ T30] ? __pfx_watchdog+0x10/0x10 [ 430.524608][ T30] kthread+0x2f0/0x390 [ 430.528687][ T30] ? __pfx_watchdog+0x10/0x10 [ 430.533373][ T30] ? __pfx_kthread+0x10/0x10 [ 430.537967][ T30] ret_from_fork+0x4b/0x80 [ 430.542394][ T30] ? __pfx_kthread+0x10/0x10 [ 430.546991][ T30] ret_from_fork_asm+0x1a/0x30 [ 430.551852][ T30] [ 430.555071][ T30] Sending NMI from CPU 1 to CPUs 0: [ 430.560306][ C0] NMI backtrace for cpu 0 [ 430.560324][ C0] CPU: 0 UID: 0 PID: 5852 Comm: syz-executor447 Not tainted 6.12.0-rc6-syzkaller-00077-g2e1b3cc9d7f7 #0 [ 430.560344][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 430.560357][ C0] RIP: 0010:dtSplitRoot+0x8de/0x1930 [ 430.560384][ C0] Code: e8 87 de 69 fe 48 c1 e3 05 4c 01 e3 49 89 dc 49 c1 ec 03 43 0f b6 04 2c 84 c0 75 15 44 0f b6 3b 45 84 ff 78 34 e8 62 de 69 fe <4c> 8b 64 24 10 eb ba 89 d9 80 e1 07 38 c1 7c e2 48 89 df e8 2a 80 [ 430.560401][ C0] RSP: 0018:ffffc90003bef4a0 EFLAGS: 00000293 [ 430.560416][ C0] RAX: ffffffff832afb9e RBX: ffff888074e3f000 RCX: ffff88807b319e00 [ 430.560429][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ff [ 430.560440][ C0] RBP: ffffc90003bef690 R08: ffffffff832afb70 R09: 0000000000000000 [ 430.560452][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1100e9c7e00 [ 430.560462][ C0] R13: dffffc0000000000 R14: ffff888077bf8d68 R15: 0000000000000000 [ 430.560474][ C0] FS: 0000555562b2c380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 [ 430.560489][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.560500][ C0] CR2: 000055e89d07d600 CR3: 00000000781da000 CR4: 00000000003526f0 [ 430.560514][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 430.560524][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 430.560535][ C0] Call Trace: [ 430.560542][ C0] [ 430.560548][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 430.560571][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 430.560597][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.560619][ C0] ? nmi_handle+0x2a/0x5a0 [ 430.560642][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 430.560663][ C0] ? nmi_handle+0x14f/0x5a0 [ 430.560679][ C0] ? nmi_handle+0x2a/0x5a0 [ 430.560696][ C0] ? dtSplitRoot+0x8de/0x1930 [ 430.560717][ C0] ? default_do_nmi+0x63/0x160 [ 430.560740][ C0] ? exc_nmi+0x123/0x1f0 [ 430.560763][ C0] ? end_repeat_nmi+0xf/0x53 [ 430.560783][ C0] ? dtSplitRoot+0x8b0/0x1930 [ 430.560804][ C0] ? dtSplitRoot+0x8de/0x1930 [ 430.560831][ C0] ? dtSplitRoot+0x8de/0x1930 [ 430.560853][ C0] ? dtSplitRoot+0x8de/0x1930 [ 430.560875][ C0] ? dtSplitRoot+0x8de/0x1930 [ 430.560897][ C0] [ 430.560902][ C0] [ 430.560921][ C0] ? __pfx_dtSplitRoot+0x10/0x10 [ 430.560942][ C0] ? __pfx_dbAlloc+0x10/0x10 [ 430.560961][ C0] ? __kasan_kmalloc+0x98/0xb0 [ 430.560983][ C0] ? dtInsert+0x857/0x6c10 [ 430.561003][ C0] ? __kmalloc_cache_noprof+0x19c/0x2c0 [ 430.561023][ C0] dtInsert+0x12cd/0x6c10 [ 430.561060][ C0] ? __pfx_dtInsert+0x10/0x10 [ 430.561084][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 430.561106][ C0] ? txLock+0x2b8/0x1f40 [ 430.561123][ C0] ? __pfx_lock_release+0x10/0x10 [ 430.561144][ C0] ? do_raw_spin_lock+0x14f/0x370 [ 430.561168][ C0] ? do_raw_spin_unlock+0x13c/0x8b0 [ 430.561187][ C0] ? dtSearch+0x1d59/0x2520 [ 430.561226][ C0] jfs_create+0x7ba/0xbb0 [ 430.561253][ C0] ? __pfx_jfs_create+0x10/0x10 [ 430.561287][ C0] ? generic_permission+0x1e0/0x550 [ 430.561307][ C0] ? bpf_lsm_inode_create+0x9/0x10 [ 430.561328][ C0] ? security_inode_create+0xbe/0x340 [ 430.561350][ C0] vfs_create+0x23c/0x3d0 [ 430.561371][ C0] do_mknodat+0x447/0x5b0 [ 430.561390][ C0] ? __pfx_do_mknodat+0x10/0x10 [ 430.561408][ C0] ? getname_flags+0x1e3/0x540 [ 430.561425][ C0] __x64_sys_mknod+0x8c/0xa0 [ 430.561445][ C0] do_syscall_64+0xf3/0x230 [ 430.561465][ C0] ? clear_bhb_loop+0x35/0x90 [ 430.561483][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.561502][ C0] RIP: 0033:0x7fb8d768fa59 [ 430.561523][ 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 [ 430.561536][ C0] RSP: 002b:00007ffcf7cf89d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 [ 430.561552][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb8d768fa59 [ 430.561563][ C0] RDX: 0000000000000701 RSI: 0000000000000000 RDI: 0000000020000000 [ 430.561573][ C0] RBP: 00007fb8d77095f0 R08: 000000000000618e R09: 0000555562b2d4c0 [ 430.561584][ C0] R10: 00007ffcf7cf88a0 R11: 0000000000000246 R12: 00007ffcf7cf8a00 [ 430.561595][ C0] R13: 00007ffcf7cf8c28 R14: 431bde82d7b634db R15: 00007fb8d76d803b [ 430.561614][ C0] [ 430.561621][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.315 msecs [ 430.996199][ T30] Kernel panic - not syncing: hung_task: blocked tasks [ 431.003163][ T30] CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc6-syzkaller-00077-g2e1b3cc9d7f7 #0 [ 431.013673][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 431.023735][ T30] Call Trace: [ 431.027026][ T30] [ 431.030051][ T30] dump_stack_lvl+0x241/0x360 [ 431.034749][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 431.039954][ T30] ? __pfx__printk+0x10/0x10 [ 431.044549][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 431.050548][ T30] ? vscnprintf+0x5d/0x90 [ 431.054889][ T30] panic+0x349/0x880 [ 431.058793][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 431.064964][ T30] ? __pfx_panic+0x10/0x10 [ 431.069384][ T30] ? tick_nohz_tick_stopped+0x82/0xb0 [ 431.074764][ T30] ? __irq_work_queue_local+0x137/0x410 [ 431.080316][ T30] ? preempt_schedule_thunk+0x1a/0x30 [ 431.085692][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 431.091903][ T30] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 431.098094][ T30] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 431.104280][ T30] watchdog+0x1033/0x1040 [ 431.108631][ T30] ? watchdog+0x1ea/0x1040 [ 431.113064][ T30] ? __pfx_watchdog+0x10/0x10 [ 431.117844][ T30] kthread+0x2f0/0x390 [ 431.121921][ T30] ? __pfx_watchdog+0x10/0x10 [ 431.126615][ T30] ? __pfx_kthread+0x10/0x10 [ 431.131213][ T30] ret_from_fork+0x4b/0x80 [ 431.135646][ T30] ? __pfx_kthread+0x10/0x10 [ 431.140247][ T30] ret_from_fork_asm+0x1a/0x30 [ 431.145044][ T30] [ 431.148317][ T30] Kernel Offset: disabled [ 431.152799][ T30] Rebooting in 86400 seconds..