./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor559082302 <...> Warning: Permanently added '10.128.1.232' (ED25519) to the list of known hosts. execve("./syz-executor559082302", ["./syz-executor559082302"], 0x7ffd1984d8e0 /* 10 vars */) = 0 brk(NULL) = 0x55558422a000 brk(0x55558422ad00) = 0x55558422ad00 arch_prctl(ARCH_SET_FS, 0x55558422a380) = 0 set_tid_address(0x55558422a650) = 5839 set_robust_list(0x55558422a660, 24) = 0 rseq(0x55558422aca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor559082302", 4096) = 27 getrandom("\x85\xaa\x7c\xa6\x91\xdd\xaa\xcb", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558422ad00 brk(0x55558424bd00) = 0x55558424bd00 brk(0x55558424c000) = 0x55558424c000 mprotect(0x7fa5711ac000, 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 5840 attached , child_tidptr=0x55558422a650) = 5840 [pid 5840] set_robust_list(0x55558422a660, 24) = 0 [pid 5840] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5840] setpgid(0, 0) = 0 [pid 5840] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5840] write(3, "1000", 4) = 4 [pid 5840] close(3) = 0 executing program [pid 5840] write(1, "executing program\n", 18) = 18 [pid 5840] memfd_create("syzkaller", 0) = 3 [pid 5840] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa568c00000 [pid 5840] 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 5840] munmap(0x7fa568c00000, 138412032) = 0 [pid 5840] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5840] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5840] close(3) = 0 [pid 5840] close(4) = 0 [pid 5840] mkdir("./bus", 0777) = 0 [pid 5840] mount("/dev/loop0", "./bus", "jfs", 0, "") = 0 [pid 5840] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5840] chdir("./bus") = 0 [pid 5840] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 106.349370][ T5840] loop0: detected capacity change from 0 to 32768 [pid 5840] rename("./file1", "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" [pid 5839] kill(-5840, SIGKILL) = 0 [pid 5839] kill(5840, SIGKILL) = 0 [pid 5839] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5839] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5839] getdents64(3, 0x55558422b6f0 /* 2 entries */, 32768) = 48 [pid 5839] getdents64(3, 0x55558422b6f0 /* 0 entries */, 32768) = 0 [pid 5839] close(3) = 0 [ 286.790326][ T31] INFO: task kworker/u8:1:12 blocked for more than 143 seconds. [ 286.798278][ T31] Not tainted 6.12.0-rc5-syzkaller-00044-gc1e939a21eb1 #0 [ 286.806780][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.816229][ T31] task:kworker/u8:1 state:D stack:19736 pid:12 tgid:12 ppid:2 flags:0x00004000 [ 286.826795][ T31] Workqueue: writeback wb_workfn (flush-7:0) [ 286.833359][ T31] Call Trace: [ 286.836721][ T31] [ 286.839692][ T31] __schedule+0x185a/0x4b70 [ 286.844981][ T31] ? __pfx___schedule+0x10/0x10 [ 286.849909][ T31] ? __blk_flush_plug+0x449/0x500 [ 286.855644][ T31] ? __pfx_lock_release+0x10/0x10 [ 286.861018][ T31] ? __mutex_trylock_common+0x92/0x2e0 [ 286.866539][ T31] ? kthread_data+0x52/0xd0 [ 286.871575][ T31] ? schedule+0x90/0x320 [ 286.875864][ T31] ? wq_worker_sleeping+0x66/0x240 [ 286.881420][ T31] ? schedule+0x90/0x320 [ 286.885700][ T31] schedule+0x14b/0x320 [ 286.889976][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.896067][ T31] __mutex_lock+0x6a7/0xd70 [ 286.900869][ T31] ? __mutex_lock+0x52a/0xd70 [ 286.905591][ T31] ? jfs_commit_inode+0x24a/0x590 [ 286.911206][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 286.916312][ T31] jfs_commit_inode+0x24a/0x590 [ 286.922297][ T31] ? __pfx_jfs_commit_inode+0x10/0x10 [ 286.927735][ T31] ? do_raw_spin_unlock+0x13c/0x8b0 [ 286.933289][ T31] jfs_write_inode+0x143/0x220 [ 286.938108][ T31] __writeback_single_inode+0x711/0x10d0 [ 286.944277][ T31] writeback_sb_inodes+0x80c/0x1370 [ 286.949529][ T31] ? mark_lock+0x2ae/0x360 [ 286.954413][ T31] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 286.960387][ T31] ? __pfx___up_read+0x10/0x10 [ 286.965219][ T31] ? do_raw_spin_lock+0x14f/0x370 [ 286.970979][ T31] __writeback_inodes_wb+0x11b/0x260 [ 286.976358][ T31] wb_writeback+0x42f/0xbd0 [ 286.981469][ T31] ? queue_io+0x311/0x5a0 [ 286.985868][ T31] ? __pfx_wb_writeback+0x10/0x10 [ 286.991486][ T31] wb_workfn+0xc58/0x1090 [ 286.995902][ T31] ? __pfx_wb_workfn+0x10/0x10 [ 287.001243][ T31] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.007292][ T31] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 287.014168][ T31] ? process_scheduled_works+0x976/0x1850 [ 287.019944][ T31] process_scheduled_works+0xa63/0x1850 [ 287.025966][ T31] ? __pfx_process_scheduled_works+0x10/0x10 [ 287.032889][ T31] ? assign_work+0x364/0x3d0 [ 287.037543][ T31] worker_thread+0x870/0xd30 [ 287.042648][ T31] ? __kthread_parkme+0x169/0x1d0 [ 287.047733][ T31] ? __pfx_worker_thread+0x10/0x10 [ 287.053334][ T31] kthread+0x2f0/0x390 [ 287.057445][ T31] ? __pfx_worker_thread+0x10/0x10 [ 287.062996][ T31] ? __pfx_kthread+0x10/0x10 [ 287.067637][ T31] ret_from_fork+0x4b/0x80 [ 287.072533][ T31] ? __pfx_kthread+0x10/0x10 [ 287.077170][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.082392][ T31] [ 287.087485][ T31] [ 287.087485][ T31] Showing all locks held in the system: [ 287.096050][ T31] 4 locks held by kworker/u8:1/12: [ 287.101546][ T31] #0: ffff8880206e1948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 [ 287.113161][ T31] #1: ffffc90000117d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 [ 287.126003][ T31] #2: ffff88807c2300e0 (&type->s_umount_key#44){.+.+}-{3:3}, at: super_trylock_shared+0x22/0xf0 [ 287.136931][ T31] #3: ffff88807767a6a8 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_commit_inode+0x24a/0x590 [ 287.148157][ T31] 1 lock held by khungtaskd/31: [ 287.153314][ T31] #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 [ 287.163593][ T31] 2 locks held by getty/5593: [ 287.168301][ T31] #0: ffff8880315590a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.178677][ T31] #1: ffffc900032532f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 [ 287.189159][ T31] 5 locks held by syz-executor559/5840: [ 287.194996][ T31] [ 287.197363][ T31] ============================================= [ 287.197363][ T31] [ 287.206321][ T31] NMI backtrace for cpu 1 [ 287.210694][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.12.0-rc5-syzkaller-00044-gc1e939a21eb1 #0 [ 287.221222][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 287.231311][ T31] Call Trace: [ 287.234610][ T31] [ 287.237565][ T31] dump_stack_lvl+0x241/0x360 [ 287.242289][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.247522][ T31] ? __pfx__printk+0x10/0x10 [ 287.252157][ T31] nmi_cpu_backtrace+0x49c/0x4d0 [ 287.257147][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.262647][ T31] ? _printk+0xd5/0x120 [ 287.266832][ T31] ? __pfx__printk+0x10/0x10 [ 287.271461][ T31] ? __wake_up_klogd+0xcc/0x110 [ 287.276358][ T31] ? __pfx__printk+0x10/0x10 [ 287.280990][ T31] ? __rcu_read_unlock+0xa1/0x110 [ 287.286065][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.292099][ T31] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 287.298154][ T31] watchdog+0xff4/0x1040 [ 287.302439][ T31] ? watchdog+0x1ea/0x1040 [ 287.306899][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.311636][ T31] kthread+0x2f0/0x390 [ 287.315766][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.320490][ T31] ? __pfx_kthread+0x10/0x10 [ 287.325115][ T31] ret_from_fork+0x4b/0x80 [ 287.329572][ T31] ? __pfx_kthread+0x10/0x10 [ 287.334192][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.339014][ T31] [ 287.342188][ T31] Sending NMI from CPU 1 to CPUs 0: [ 287.347474][ C0] NMI backtrace for cpu 0 [ 287.347497][ C0] CPU: 0 UID: 0 PID: 5840 Comm: syz-executor559 Not tainted 6.12.0-rc5-syzkaller-00044-gc1e939a21eb1 #0 [ 287.347519][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 287.347533][ C0] RIP: 0010:dtSplitRoot+0x8cc/0x1930 [ 287.347564][ C0] Code: df 0f b6 f3 bf ff 00 00 00 e8 f0 eb 69 fe 84 db 78 44 e8 e7 e8 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 c2 e8 69 fe 4c 8b 64 24 [ 287.347583][ C0] RSP: 0018:ffffc90003e37140 EFLAGS: 00000a06 [ 287.347600][ C0] RAX: 0000000000000000 RBX: ffff88807cbe3000 RCX: ffff88807d369e00 [ 287.347612][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ff [ 287.347623][ C0] RBP: ffffc90003e37330 R08: ffffffff832af0d0 R09: 0000000000000000 [ 287.347635][ C0] R10: 00300065006c0069 R11: 006605ff00000020 R12: 1ffff1100f97c600 [ 287.347648][ C0] R13: dffffc0000000000 R14: ffff88807767a910 R15: 0000000000000000 [ 287.347661][ C0] FS: 000055558422a380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 [ 287.347677][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.347689][ C0] CR2: 00005584cf72b600 CR3: 00000000737b8000 CR4: 00000000003526f0 [ 287.347704][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.347714][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.347725][ C0] Call Trace: [ 287.347734][ C0] [ 287.347741][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 287.347767][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 287.347795][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.347819][ C0] ? nmi_handle+0x2a/0x5a0 [ 287.347844][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 287.347868][ C0] ? nmi_handle+0x14f/0x5a0 [ 287.347885][ C0] ? nmi_handle+0x2a/0x5a0 [ 287.347903][ C0] ? dtSplitRoot+0x8cc/0x1930 [ 287.347927][ C0] ? default_do_nmi+0x63/0x160 [ 287.347952][ C0] ? exc_nmi+0x123/0x1f0 [ 287.347977][ C0] ? end_repeat_nmi+0xf/0x53 [ 287.348005][ C0] ? dtSplitRoot+0x8b0/0x1930 [ 287.348030][ C0] ? dtSplitRoot+0x8cc/0x1930 [ 287.348054][ C0] ? dtSplitRoot+0x8cc/0x1930 [ 287.348079][ C0] ? dtSplitRoot+0x8cc/0x1930 [ 287.348103][ C0] [ 287.348108][ C0] [ 287.348128][ C0] ? __pfx_dtSplitRoot+0x10/0x10 [ 287.348152][ C0] ? __pfx_dbAlloc+0x10/0x10 [ 287.348173][ C0] ? __kasan_kmalloc+0x98/0xb0 [ 287.348198][ C0] ? dtInsert+0x857/0x6c10 [ 287.348220][ C0] ? __kmalloc_cache_noprof+0x19c/0x2c0 [ 287.348242][ C0] dtInsert+0x12cd/0x6c10 [ 287.348270][ C0] ? kasan_save_free_info+0x40/0x50 [ 287.348290][ C0] ? kfree+0x1a0/0x440 [ 287.348307][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.348334][ C0] ? mark_lock+0x9a/0x360 [ 287.348350][ C0] ? __pfx_dtInsert+0x10/0x10 [ 287.348373][ C0] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.348401][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 287.348431][ C0] ? lockdep_hardirqs_on+0x99/0x150 [ 287.348452][ C0] ? dtSearch+0x1d59/0x2520 [ 287.348475][ C0] ? kfree+0x1a0/0x440 [ 287.348491][ C0] ? dtSearch+0x1d59/0x2520 [ 287.348543][ C0] jfs_rename+0xafe/0x1bf0 [ 287.348563][ C0] ? __pfx_jfs_rename+0x10/0x10 [ 287.348612][ C0] ? __pfx___might_resched+0x10/0x10 [ 287.348645][ C0] ? __pfx_down_write_nested+0x10/0x10 [ 287.348667][ C0] ? do_raw_spin_unlock+0x13c/0x8b0 [ 287.348689][ C0] ? __asan_memcpy+0x40/0x70 [ 287.348711][ C0] ? __pfx_jfs_rename+0x10/0x10 [ 287.348728][ C0] vfs_rename+0xbdb/0xf00 [ 287.348759][ C0] ? __pfx_vfs_rename+0x10/0x10 [ 287.348787][ C0] ? bpf_lsm_path_rename+0x9/0x10 [ 287.348815][ C0] do_renameat2+0xd94/0x13f0 [ 287.348859][ C0] ? __pfx_do_renameat2+0x10/0x10 [ 287.348895][ C0] ? strncpy_from_user+0x13a/0x260 [ 287.348971][ C0] ? getname_flags+0x1e3/0x540 [ 287.348997][ C0] __x64_sys_rename+0x82/0x90 [ 287.349022][ C0] do_syscall_64+0xf3/0x230 [ 287.349043][ C0] ? clear_bhb_loop+0x35/0x90 [ 287.349063][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.349081][ C0] RIP: 0033:0x7fa571132a59 [ 287.349101][ 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 [ 287.349115][ C0] RSP: 002b:00007ffc61a07c18 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 [ 287.349134][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa571132a59 [ 287.349146][ C0] RDX: 0000000000000000 RSI: 0000000020000f00 RDI: 0000000020000000 [ 287.349157][ C0] RBP: 00007fa5711ac5f0 R08: 0000000000006152 R09: 000055558422b4c0 [ 287.349169][ C0] R10: 00007ffc61a07ae0 R11: 0000000000000246 R12: 00007ffc61a07c40 [ 287.349181][ C0] R13: 00007ffc61a07e68 R14: 431bde82d7b634db R15: 00007fa57117b03b [ 287.349201][ C0] [ 287.349209][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.736 msecs [ 287.400220][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.400244][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.12.0-rc5-syzkaller-00044-gc1e939a21eb1 #0 [ 287.400272][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 287.400287][ T31] Call Trace: [ 287.400301][ T31] [ 287.400312][ T31] dump_stack_lvl+0x241/0x360 [ 287.400351][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.400381][ T31] ? __pfx__printk+0x10/0x10 [ 287.400404][ T31] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.400448][ T31] ? vscnprintf+0x5d/0x90 [ 287.400482][ T31] panic+0x349/0x880 [ 287.400509][ T31] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.400545][ T31] ? __pfx_panic+0x10/0x10 [ 287.400575][ T31] ? tick_nohz_tick_stopped+0x82/0xb0 [ 287.902886][ T31] ? __irq_work_queue_local+0x137/0x410 [ 287.908456][ T31] ? preempt_schedule_thunk+0x1a/0x30 [ 287.913852][ T31] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.920019][ T31] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 287.926191][ T31] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 287.932369][ T31] watchdog+0x1033/0x1040 [ 287.936739][ T31] ? watchdog+0x1ea/0x1040 [ 287.941191][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.945902][ T31] kthread+0x2f0/0x390 [ 287.950003][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.954705][ T31] ? __pfx_kthread+0x10/0x10 [ 287.959311][ T31] ret_from_fork+0x4b/0x80 [ 287.963749][ T31] ? __pfx_kthread+0x10/0x10 [ 287.968353][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.973198][ T31] [ 287.976561][ T31] Kernel Offset: disabled [ 287.980888][ T31] Rebooting in 86400 seconds..