./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3628283158 <...> Warning: Permanently added '10.128.0.155' (ED25519) to the list of known hosts. execve("./syz-executor3628283158", ["./syz-executor3628283158"], 0x7ffcb9b05050 /* 10 vars */) = 0 brk(NULL) = 0x55556b1f8000 brk(0x55556b1f8d00) = 0x55556b1f8d00 arch_prctl(ARCH_SET_FS, 0x55556b1f8380) = 0 set_tid_address(0x55556b1f8650) = 5857 set_robust_list(0x55556b1f8660, 24) = 0 rseq(0x55556b1f8ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3628283158", 4096) = 28 getrandom("\xe1\xf8\x6e\xf6\x4b\x78\x81\x65", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556b1f8d00 brk(0x55556b219d00) = 0x55556b219d00 brk(0x55556b21a000) = 0x55556b21a000 mprotect(0x7f53bbb4d000, 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 5859 attached , child_tidptr=0x55556b1f8650) = 5859 [pid 5859] set_robust_list(0x55556b1f8660, 24) = 0 [pid 5859] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5859] setpgid(0, 0) = 0 [pid 5859] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "1000", 4) = 4 [pid 5859] close(3) = 0 executing program [pid 5859] write(1, "executing program\n", 18) = 18 [pid 5859] memfd_create("syzkaller", 0) = 3 [pid 5859] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f53b3600000 [pid 5859] write(3, "\xeb\x76\x90\x45\x58\x46\x41\x54\x20\x20\x20\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x80\x00\x00\x00\x08\x00\x00\x00\x88\x00\x00\x00\x0f\x00\x00\x00\x05\x00\x00\x00"..., 131072) = 131072 [pid 5859] munmap(0x7f53b3600000, 138412032) = 0 [pid 5859] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5859] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5859] close(3) = 0 [pid 5859] close(4) = 0 [pid 5859] mkdir("./file1", 0777) = 0 [ 130.081821][ T5859] loop0: detected capacity change from 0 to 256 [pid 5859] mount("/dev/loop0", "./file1", "exfat", 0, "errors=continue,") = 0 [pid 5859] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5859] chdir("./file1") = 0 [pid 5859] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5859] mkdirat(AT_FDCWD, "./file0", 000) = 0 [ 130.129997][ T5859] exFAT-fs (loop0): failed to load upcase table (idx : 0x000104d0, chksum : 0x60d18cac, utbl_chksum : 0xe619d30d) [pid 5859] truncate("./file1", 61440) = 0 [pid 5859] creat("./file1", 050 [pid 5857] kill(-5859, SIGKILL) = 0 [pid 5857] kill(5859, SIGKILL) = 0 [pid 5857] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5857] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5857] getdents64(3, 0x55556b1f96f0 /* 2 entries */, 32768) = 48 [pid 5857] getdents64(3, 0x55556b1f96f0 /* 0 entries */, 32768) = 0 [pid 5857] close(3) = 0 [ 286.633483][ T30] INFO: task kworker/u8:3:51 blocked for more than 143 seconds. [ 286.641273][ T30] Not tainted 6.12.0-syzkaller-10740-g509f806f7f70 #0 [ 286.651715][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.661025][ T30] task:kworker/u8:3 state:D stack:22224 pid:51 tgid:51 ppid:2 flags:0x00004000 [ 286.671532][ T30] Workqueue: writeback wb_workfn (flush-7:0) [ 286.677887][ T30] Call Trace: [ 286.681182][ T30] [ 286.684490][ T30] __schedule+0x17fb/0x4be0 [ 286.689100][ T30] ? __pfx___schedule+0x10/0x10 [ 286.694478][ T30] ? __blk_flush_plug+0x449/0x500 [ 286.699543][ T30] ? __pfx_lock_release+0x10/0x10 [ 286.705014][ T30] ? kthread_data+0x52/0xd0 [ 286.709551][ T30] ? schedule+0x90/0x320 [ 286.714250][ T30] ? wq_worker_sleeping+0x66/0x240 [ 286.719388][ T30] ? schedule+0x90/0x320 [ 286.724046][ T30] schedule+0x14b/0x320 [ 286.728241][ T30] schedule_preempt_disabled+0x13/0x30 [ 286.734387][ T30] __mutex_lock+0x7e7/0xee0 [ 286.738924][ T30] ? __mutex_lock+0x5ef/0xee0 [ 286.743993][ T30] ? exfat_write_inode+0xe5/0x1a0 [ 286.749205][ T30] ? __pfx___mutex_lock+0x10/0x10 [ 286.754829][ T30] ? __writeback_single_inode+0x48f/0x10d0 [ 286.760688][ T30] ? do_raw_spin_unlock+0x13c/0x8b0 [ 286.766878][ T30] exfat_write_inode+0xe5/0x1a0 [ 286.771764][ T30] __writeback_single_inode+0x708/0x10d0 [ 286.777867][ T30] writeback_sb_inodes+0x820/0x1360 [ 286.783101][ T30] ? mark_lock+0x2ae/0x360 [ 286.787953][ T30] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 286.793931][ T30] ? __pfx___up_read+0x10/0x10 [ 286.798725][ T30] ? do_raw_spin_lock+0x14f/0x370 [ 286.804166][ T30] __writeback_inodes_wb+0x11b/0x260 [ 286.809488][ T30] wb_writeback+0x427/0xb80 [ 286.814403][ T30] ? queue_io+0x361/0x5a0 [ 286.818790][ T30] ? __pfx_wb_writeback+0x10/0x10 [ 286.824426][ T30] wb_workfn+0xc4b/0x1080 [ 286.828809][ T30] ? __pfx_wb_workfn+0x10/0x10 [ 286.834064][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 286.840097][ T30] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 286.847060][ T30] ? process_scheduled_works+0x976/0x1840 [ 286.852829][ T30] process_scheduled_works+0xa66/0x1840 [ 286.859062][ T30] ? __pfx_process_scheduled_works+0x10/0x10 [ 286.865346][ T30] ? assign_work+0x364/0x3d0 [ 286.869982][ T30] worker_thread+0x870/0xd30 [ 286.875689][ T30] ? __kthread_parkme+0x169/0x1d0 [ 286.880778][ T30] ? __pfx_worker_thread+0x10/0x10 [ 286.886402][ T30] kthread+0x2f0/0x390 [ 286.890512][ T30] ? __pfx_worker_thread+0x10/0x10 [ 286.896093][ T30] ? __pfx_kthread+0x10/0x10 [ 286.900712][ T30] ret_from_fork+0x4b/0x80 [ 286.905476][ T30] ? __pfx_kthread+0x10/0x10 [ 286.910089][ T30] ret_from_fork_asm+0x1a/0x30 [ 286.915251][ T30] [ 286.921442][ T30] [ 286.921442][ T30] Showing all locks held in the system: [ 286.929842][ T30] 1 lock held by khungtaskd/30: [ 286.934997][ T30] #0: ffffffff8e93c560 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 [ 286.945275][ T30] 4 locks held by kworker/u8:3/51: [ 286.950412][ T30] #0: ffff888143ec2948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 [ 286.962235][ T30] #1: ffffc90000bb7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 [ 286.975067][ T30] #2: ffff88807e3580e0 (&type->s_umount_key#43){.+.+}-{4:4}, at: super_trylock_shared+0x22/0xf0 [ 286.986471][ T30] #3: ffff8880666ae0e8 (&sbi->s_lock){+.+.}-{4:4}, at: exfat_write_inode+0xe5/0x1a0 [ 286.996389][ T30] 2 locks held by getty/5603: [ 287.001081][ T30] #0: ffff88814e2000a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.011318][ T30] #1: ffffc9000331b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 [ 287.021801][ T30] 5 locks held by syz-executor362/5859: [ 287.027606][ T30] [ 287.029942][ T30] ============================================= [ 287.029942][ T30] [ 287.038982][ T30] NMI backtrace for cpu 1 [ 287.043369][ T30] CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-10740-g509f806f7f70 #0 [ 287.053539][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 287.063611][ T30] Call Trace: [ 287.066911][ T30] [ 287.069859][ T30] dump_stack_lvl+0x241/0x360 [ 287.074646][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.079859][ T30] ? __pfx__printk+0x10/0x10 [ 287.084480][ T30] nmi_cpu_backtrace+0x49c/0x4d0 [ 287.089526][ T30] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.095005][ T30] ? _printk+0xd5/0x120 [ 287.099176][ T30] ? __pfx__printk+0x10/0x10 [ 287.103780][ T30] ? __wake_up_klogd+0xcc/0x110 [ 287.108648][ T30] ? __pfx__printk+0x10/0x10 [ 287.113266][ T30] ? __rcu_read_unlock+0xa1/0x110 [ 287.118307][ T30] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.124307][ T30] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 287.130306][ T30] watchdog+0xff6/0x1040 [ 287.134562][ T30] ? watchdog+0x1ea/0x1040 [ 287.138991][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.143677][ T30] kthread+0x2f0/0x390 [ 287.147754][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.152452][ T30] ? __pfx_kthread+0x10/0x10 [ 287.157074][ T30] ret_from_fork+0x4b/0x80 [ 287.161506][ T30] ? __pfx_kthread+0x10/0x10 [ 287.166111][ T30] ret_from_fork_asm+0x1a/0x30 [ 287.170906][ T30] [ 287.174077][ T30] Sending NMI from CPU 1 to CPUs 0: [ 287.179320][ C0] NMI backtrace for cpu 0 [ 287.179397][ C0] CPU: 0 UID: 0 PID: 5859 Comm: syz-executor362 Not tainted 6.12.0-syzkaller-10740-g509f806f7f70 #0 [ 287.179416][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 287.179426][ C0] RIP: 0010:check_preemption_disabled+0x2e/0x120 [ 287.179450][ C0] Code: 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65 8b 1d ec 99 39 74 65 8b 05 e1 99 39 74 a9 ff ff ff 7f 74 26 <65> 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 ce 00 00 00 89 d8 [ 287.179463][ C0] RSP: 0018:ffffc9000406f108 EFLAGS: 00000046 [ 287.179478][ C0] RAX: 0000000080000000 RBX: 0000000000000000 RCX: ffffffff817142a0 [ 287.179489][ C0] RDX: 0000000000000000 RSI: ffffffff8c0ae6c0 RDI: ffffffff8c608460 [ 287.179500][ C0] RBP: ffffc9000406f278 R08: ffffffff901d0837 R09: 1ffffffff203a106 [ 287.179512][ C0] R10: dffffc0000000000 R11: fffffbfff203a107 R12: 1ffff9200080de34 [ 287.179524][ C0] R13: ffffffff81eebf03 R14: ffffc9000406f1f0 R15: dffffc0000000000 [ 287.179536][ C0] FS: 000055556b1f8380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 [ 287.179550][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.179562][ C0] CR2: 000056280ab6b600 CR3: 0000000034cac000 CR4: 00000000003526f0 [ 287.179576][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.179585][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.179596][ C0] Call Trace: [ 287.179603][ C0] [ 287.179610][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 287.179629][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 287.179647][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.179665][ C0] ? nmi_handle+0x2a/0x5a0 [ 287.179689][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 287.179711][ C0] ? nmi_handle+0x14f/0x5a0 [ 287.179727][ C0] ? nmi_handle+0x2a/0x5a0 [ 287.179744][ C0] ? check_preemption_disabled+0x2e/0x120 [ 287.179761][ C0] ? default_do_nmi+0x63/0x160 [ 287.179780][ C0] ? exc_nmi+0x123/0x1f0 [ 287.179798][ C0] ? end_repeat_nmi+0xf/0x53 [ 287.179816][ C0] ? fs_reclaim_acquire+0x93/0x130 [ 287.179839][ C0] ? lock_release+0xb0/0xa30 [ 287.179855][ C0] ? check_preemption_disabled+0x2e/0x120 [ 287.179871][ C0] ? check_preemption_disabled+0x2e/0x120 [ 287.179889][ C0] ? check_preemption_disabled+0x2e/0x120 [ 287.179905][ C0] [ 287.179910][ C0] [ 287.179917][ C0] lock_release+0x1bc/0xa30 [ 287.179934][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 287.179951][ C0] ? fs_reclaim_acquire+0x93/0x130 [ 287.179971][ C0] ? __pfx_lock_release+0x10/0x10 [ 287.179991][ C0] ? fs_reclaim_acquire+0x93/0x130 [ 287.180012][ C0] bdev_getblk+0x3d/0x550 [ 287.180034][ C0] __bread_gfp+0x86/0x400 [ 287.180051][ C0] exfat_ent_get+0x14d/0x400 [ 287.180074][ C0] __exfat_free_cluster+0x56f/0x990 [ 287.180100][ C0] ? __pfx___exfat_free_cluster+0x10/0x10 [ 287.180123][ C0] ? do_raw_spin_unlock+0x13c/0x8b0 [ 287.180146][ C0] exfat_free_cluster+0x77/0xd0 [ 287.180167][ C0] __exfat_truncate+0x745/0xa60 [ 287.180193][ C0] ? __pfx___exfat_truncate+0x10/0x10 [ 287.180217][ C0] ? truncate_setsize+0xcf/0xf0 [ 287.180242][ C0] exfat_setattr+0x10fa/0x1a90 [ 287.180267][ C0] ? __pfx_smack_inode_setattr+0x10/0x10 [ 287.180294][ C0] ? __pfx_exfat_setattr+0x10/0x10 [ 287.180315][ C0] ? evm_inode_setattr+0x1b2/0x7d0 [ 287.180335][ C0] ? security_inode_setattr+0xdb/0x350 [ 287.180349][ C0] ? __pfx_exfat_setattr+0x10/0x10 [ 287.180372][ C0] notify_change+0xbca/0xe90 [ 287.180399][ C0] do_truncate+0x220/0x310 [ 287.180422][ C0] ? __pfx_do_truncate+0x10/0x10 [ 287.180452][ C0] path_openat+0x2e1e/0x3590 [ 287.180474][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 287.180509][ C0] ? __pfx_path_openat+0x10/0x10 [ 287.180538][ C0] do_filp_open+0x27f/0x4e0 [ 287.180559][ C0] ? __pfx_do_filp_open+0x10/0x10 [ 287.180579][ C0] ? do_raw_spin_lock+0x14f/0x370 [ 287.180617][ C0] do_sys_openat2+0x13e/0x1d0 [ 287.180636][ C0] ? __pfx_do_sys_openat2+0x10/0x10 [ 287.180654][ C0] ? _raw_spin_unlock_irq+0x2e/0x50 [ 287.180676][ C0] ? ptrace_notify+0x279/0x380 [ 287.180698][ C0] __x64_sys_creat+0x123/0x170 [ 287.180717][ C0] ? __pfx___x64_sys_creat+0x10/0x10 [ 287.180737][ C0] ? do_syscall_64+0x100/0x230 [ 287.180756][ C0] do_syscall_64+0xf3/0x230 [ 287.180771][ C0] ? clear_bhb_loop+0x35/0x90 [ 287.180790][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.180807][ C0] RIP: 0033:0x7f53bbad8ad9 [ 287.180827][ 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 [ 287.180839][ C0] RSP: 002b:00007ffddb32ccc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 287.180855][ C0] RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f53bbad8ad9 [ 287.180866][ C0] RDX: 00007f53bbad8ad9 RSI: 0000000000000028 RDI: 0000000020000080 [ 287.180877][ C0] RBP: 00007f53bbb4d5f0 R08: 000055556b1f94c0 R09: 000055556b1f94c0 [ 287.180887][ C0] R10: 000055556b1f94c0 R11: 0000000000000246 R12: 00007ffddb32ccf0 [ 287.180898][ C0] R13: 00007ffddb32cf18 R14: 431bde82d7b634db R15: 00007f53bbb2103b [ 287.180916][ C0] [ 287.180924][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.603 msecs [ 287.233329][ T30] Kernel panic - not syncing: hung_task: blocked tasks [ 287.233346][ T30] CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-10740-g509f806f7f70 #0 [ 287.233368][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 287.233379][ T30] Call Trace: [ 287.233388][ T30] [ 287.233397][ T30] dump_stack_lvl+0x241/0x360 [ 287.233422][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.233441][ T30] ? __pfx__printk+0x10/0x10 [ 287.233463][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.233488][ T30] ? vscnprintf+0x5d/0x90 [ 287.233509][ T30] panic+0x349/0x880 [ 287.233534][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.233556][ T30] ? __pfx_panic+0x10/0x10 [ 287.233578][ T30] ? tick_nohz_tick_stopped+0x82/0xb0 [ 287.233601][ T30] ? __irq_work_queue_local+0x137/0x410 [ 287.233621][ T30] ? preempt_schedule_thunk+0x1a/0x30 [ 287.233639][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.233659][ T30] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 287.233681][ T30] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 287.233705][ T30] watchdog+0x1035/0x1040 [ 287.233724][ T30] ? watchdog+0x1ea/0x1040 [ 287.233747][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.233764][ T30] kthread+0x2f0/0x390 [ 287.233784][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.233801][ T30] ? __pfx_kthread+0x10/0x10 [ 287.233820][ T30] ret_from_fork+0x4b/0x80 [ 287.233836][ T30] ? __pfx_kthread+0x10/0x10 [ 287.233855][ T30] ret_from_fork_asm+0x1a/0x30 [ 287.233889][ T30] [ 287.843247][ T30] Kernel Offset: disabled [ 287.847564][ T30] Rebooting in 86400 seconds..