./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2808246294 <...> Warning: Permanently added '10.128.0.127' (ED25519) to the list of known hosts. execve("./syz-executor2808246294", ["./syz-executor2808246294"], 0x7ffe0aa391d0 /* 10 vars */) = 0 brk(NULL) = 0x55556f3c3000 brk(0x55556f3c3d00) = 0x55556f3c3d00 arch_prctl(ARCH_SET_FS, 0x55556f3c3380) = 0 set_tid_address(0x55556f3c3650) = 5062 set_robust_list(0x55556f3c3660, 24) = 0 rseq(0x55556f3c3ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2808246294", 4096) = 28 getrandom("\xb1\xbd\xac\x96\x92\x1c\xa4\xfe", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556f3c3d00 brk(0x55556f3e4d00) = 0x55556f3e4d00 brk(0x55556f3e5000) = 0x55556f3e5000 mprotect(0x7f8ebb36d000, 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 5063 attached , child_tidptr=0x55556f3c3650) = 5063 [pid 5063] set_robust_list(0x55556f3c3660, 24) = 0 [pid 5063] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5063] setpgid(0, 0) = 0 [pid 5063] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5063] write(3, "1000", 4) = 4 [pid 5063] close(3) = 0 [pid 5063] memfd_create("syzkaller", 0) = 3 [pid 5063] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8eb2e00000 [pid 5063] 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\x03\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 5063] munmap(0x7f8eb2e00000, 138412032) = 0 [pid 5063] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5063] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5063] close(3) = 0 [pid 5063] close(4) = 0 [pid 5063] mkdir("./file2", 0777) = 0 [ 72.441007][ T5063] loop0: detected capacity change from 0 to 256 [pid 5063] mount("/dev/loop0", "./file2", "exfat", 0, "") = 0 [pid 5063] openat(AT_FDCWD, "./file2", O_RDONLY|O_DIRECTORY) = 3 [pid 5063] chdir("./file2") = 0 [pid 5063] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5063] truncate("./file2", 28670) = 0 [ 72.481155][ T5063] exFAT-fs (loop0): failed to load upcase table (idx : 0x0000fd4f, chksum : 0x9563797b, utbl_chksum : 0xe619d30d) [pid 5063] creat("./file2", 000 [pid 5062] kill(-5063, SIGKILL) = 0 [pid 5062] kill(5063, SIGKILL) = 0 [pid 5062] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5062] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5062] getdents64(3, 0x55556f3c46f0 /* 2 entries */, 32768) = 48 [pid 5062] getdents64(3, 0x55556f3c46f0 /* 0 entries */, 32768) = 0 [pid 5062] close(3) = 0 [ 87.144567][ T44] cfg80211: failed to load regulatory.db [ 286.814090][ T29] INFO: task kworker/u8:2:38 blocked for more than 143 seconds. [ 286.821975][ T29] Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 [ 286.829338][ T29] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.839757][ T29] task:kworker/u8:2 state:D stack:22056 pid:38 tgid:38 ppid:2 flags:0x00004000 [ 286.850357][ T29] Workqueue: writeback wb_workfn (flush-7:0) [ 286.856809][ T29] Call Trace: [ 286.860118][ T29] [ 286.863077][ T29] __schedule+0x1781/0x49d0 [ 286.868546][ T29] ? __pfx___schedule+0x10/0x10 [ 286.873451][ T29] ? __blk_flush_plug+0x470/0x500 [ 286.878644][ T29] ? __pfx_lock_release+0x10/0x10 [ 286.883770][ T29] ? __mutex_trylock_common+0x92/0x2e0 [ 286.889957][ T29] ? kthread_data+0x52/0xd0 [ 286.894828][ T29] ? schedule+0x90/0x320 [ 286.899118][ T29] ? wq_worker_sleeping+0x66/0x240 [ 286.904777][ T29] ? schedule+0x90/0x320 [ 286.909063][ T29] schedule+0x14b/0x320 [ 286.913258][ T29] schedule_preempt_disabled+0x13/0x30 [ 286.919516][ T29] __mutex_lock+0x6a4/0xd70 [ 286.924359][ T29] ? __mutex_lock+0x527/0xd70 [ 286.929096][ T29] ? exfat_write_inode+0x69/0x120 [ 286.934727][ T29] ? __pfx___mutex_lock+0x10/0x10 [ 286.939807][ T29] ? do_raw_spin_unlock+0x13c/0x8b0 [ 286.946145][ T29] exfat_write_inode+0x69/0x120 [ 286.951051][ T29] __writeback_single_inode+0x69f/0xfd0 [ 286.957108][ T29] writeback_sb_inodes+0x8e4/0x1220 [ 286.962371][ T29] ? __pfx_lock_acquire+0x10/0x10 [ 286.967847][ T29] ? __pfx_reacquire_held_locks+0x10/0x10 [ 286.973619][ T29] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 286.979608][ T29] ? do_raw_spin_lock+0x14f/0x370 [ 286.985069][ T29] __writeback_inodes_wb+0x11b/0x260 [ 286.990423][ T29] wb_writeback+0x45b/0xc70 [ 286.995445][ T29] ? __pfx_wb_writeback+0x10/0x10 [ 287.000534][ T29] wb_workfn+0xc33/0x1070 [ 287.005386][ T29] ? __pfx_wb_workfn+0x10/0x10 [ 287.010196][ T29] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.016493][ T29] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 287.022866][ T29] ? process_scheduled_works+0x91b/0x1770 [ 287.029125][ T29] process_scheduled_works+0xa00/0x1770 [ 287.035011][ T29] ? __pfx_process_scheduled_works+0x10/0x10 [ 287.041031][ T29] ? assign_work+0x364/0x3d0 [ 287.046066][ T29] worker_thread+0x86d/0xd70 [ 287.050705][ T29] ? __kthread_parkme+0x169/0x1d0 [ 287.056772][ T29] ? __pfx_worker_thread+0x10/0x10 [ 287.061926][ T29] kthread+0x2f0/0x390 [ 287.066441][ T29] ? __pfx_worker_thread+0x10/0x10 [ 287.071588][ T29] ? __pfx_kthread+0x10/0x10 [ 287.076702][ T29] ret_from_fork+0x4b/0x80 [ 287.081202][ T29] ? __pfx_kthread+0x10/0x10 [ 287.086270][ T29] ret_from_fork_asm+0x1a/0x30 [ 287.091121][ T29] [ 287.094746][ T29] [ 287.094746][ T29] Showing all locks held in the system: [ 287.102492][ T29] 1 lock held by khungtaskd/29: [ 287.107679][ T29] #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 [ 287.118054][ T29] 4 locks held by kworker/u8:2/38: [ 287.123186][ T29] #0: ffff88801aacf148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 [ 287.135031][ T29] #1: ffffc90000ae7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 [ 287.147907][ T29] #2: ffff88801f0180e0 (&type->s_umount_key#44){.+.+}-{3:3}, at: super_trylock_shared+0x22/0xf0 [ 287.158827][ T29] #3: ffff8880753ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_write_inode+0x69/0x120 [ 287.169307][ T29] 2 locks held by getty/4814: [ 287.174314][ T29] #0: ffff88802aa260a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.184615][ T29] #1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 [ 287.195104][ T29] 5 locks held by syz-executor280/5063: [ 287.200674][ T29] [ 287.203021][ T29] ============================================= [ 287.203021][ T29] [ 287.212183][ T29] NMI backtrace for cpu 1 [ 287.216532][ T29] CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 [ 287.226002][ T29] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 287.236078][ T29] Call Trace: [ 287.239378][ T29] [ 287.242329][ T29] dump_stack_lvl+0x241/0x360 [ 287.247128][ T29] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.252348][ T29] ? __pfx__printk+0x10/0x10 [ 287.257008][ T29] ? vprintk_emit+0x631/0x770 [ 287.261713][ T29] ? __pfx_vprintk_emit+0x10/0x10 [ 287.266780][ T29] nmi_cpu_backtrace+0x49c/0x4d0 [ 287.271800][ T29] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.277285][ T29] ? _printk+0xd5/0x120 [ 287.281472][ T29] ? __pfx__printk+0x10/0x10 [ 287.286105][ T29] ? __wake_up_klogd+0xcc/0x110 [ 287.290987][ T29] ? __pfx__printk+0x10/0x10 [ 287.295612][ T29] ? __rcu_read_unlock+0xa1/0x110 [ 287.300684][ T29] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.306691][ T29] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 287.312704][ T29] watchdog+0xfb0/0xff0 [ 287.316915][ T29] ? watchdog+0x1ea/0xff0 [ 287.321289][ T29] ? __pfx_watchdog+0x10/0x10 [ 287.326002][ T29] kthread+0x2f0/0x390 [ 287.330099][ T29] ? __pfx_watchdog+0x10/0x10 [ 287.334809][ T29] ? __pfx_kthread+0x10/0x10 [ 287.339429][ T29] ret_from_fork+0x4b/0x80 [ 287.343880][ T29] ? __pfx_kthread+0x10/0x10 [ 287.348501][ T29] ret_from_fork_asm+0x1a/0x30 [ 287.353323][ T29] [ 287.356515][ T29] Sending NMI from CPU 1 to CPUs 0: [ 287.361747][ C0] NMI backtrace for cpu 0 [ 287.361759][ C0] CPU: 0 PID: 5063 Comm: syz-executor280 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 [ 287.361777][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 287.361787][ C0] RIP: 0010:lock_is_held_type+0xa9/0x190 [ 287.361873][ C0] Code: f3 96 74 41 83 bd d0 0a 00 00 00 7e 47 4c 89 eb 48 81 c3 d8 0a 00 00 31 ed 48 83 fd 31 73 24 48 89 df 4c 89 fe e8 67 02 00 00 <85> c0 75 2a 48 ff c5 49 63 85 d0 0a 00 00 48 83 c3 28 48 39 c5 7c [ 287.361887][ C0] RSP: 0018:ffffc900043070b8 EFLAGS: 00000046 [ 287.361903][ C0] RAX: 0000000000000000 RBX: ffff8880216d4728 RCX: ffff8880216d3c00 [ 287.361916][ C0] RDX: 0000000000000000 RSI: ffffffff8e131fa0 RDI: ffff8880216d4728 [ 287.361929][ C0] RBP: 0000000000000002 R08: ffffffff8217a5c8 R09: 1ffffffff1f0c1bd [ 287.361941][ C0] R10: dffffc0000000000 R11: fffffbfff1f0c1be R12: 0000000000000246 [ 287.361953][ C0] R13: ffff8880216d3c00 R14: 00000000ffffffff R15: ffffffff8e131fa0 [ 287.361966][ C0] FS: 000055556f3c3380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 [ 287.361982][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.361994][ C0] CR2: 00007ffc5d87fe1c CR3: 0000000011324000 CR4: 00000000003506f0 [ 287.362009][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.362019][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.362029][ C0] Call Trace: [ 287.362037][ C0] [ 287.362044][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 287.362065][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 287.362085][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.362114][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 287.362136][ C0] ? nmi_handle+0x14f/0x580 [ 287.362161][ C0] ? nmi_handle+0x2a/0x580 [ 287.362178][ C0] ? lock_is_held_type+0xa9/0x190 [ 287.362203][ C0] ? default_do_nmi+0x63/0x160 [ 287.362224][ C0] ? exc_nmi+0x123/0x1f0 [ 287.362261][ C0] ? end_repeat_nmi+0xf/0x53 [ 287.362331][ C0] ? bdev_getblk+0x58/0x610 [ 287.362367][ C0] ? lock_is_held_type+0xa9/0x190 [ 287.362393][ C0] ? lock_is_held_type+0xa9/0x190 [ 287.362420][ C0] ? lock_is_held_type+0xa9/0x190 [ 287.362446][ C0] [ 287.362451][ C0] [ 287.362459][ C0] __might_resched+0xf4/0x780 [ 287.362483][ C0] ? fs_reclaim_acquire+0x93/0x130 [ 287.362520][ C0] ? __pfx___might_resched+0x10/0x10 [ 287.362548][ C0] bdev_getblk+0x8e/0x610 [ 287.362573][ C0] ? mark_buffer_dirty+0x1f/0x500 [ 287.362601][ C0] __bread_gfp+0xac/0x430 [ 287.362627][ C0] exfat_ent_get+0x14d/0x400 [ 287.362652][ C0] __exfat_free_cluster+0x56f/0x990 [ 287.362680][ C0] ? __pfx___exfat_free_cluster+0x10/0x10 [ 287.362705][ C0] ? do_raw_spin_unlock+0x13c/0x8b0 [ 287.362730][ C0] exfat_free_cluster+0x77/0xd0 [ 287.362753][ C0] __exfat_truncate+0x747/0xa60 [ 287.362781][ C0] ? __pfx___exfat_truncate+0x10/0x10 [ 287.362805][ C0] ? unmap_mapping_range+0xf8/0x290 [ 287.362828][ C0] ? __pfx_unmap_mapping_range+0x10/0x10 [ 287.362856][ C0] exfat_truncate+0xe6/0x380 [ 287.362879][ C0] ? truncate_setsize+0xcf/0xf0 [ 287.362914][ C0] exfat_setattr+0x1067/0x1930 [ 287.362941][ C0] ? __pfx_smack_inode_setattr+0x10/0x10 [ 287.362980][ C0] ? current_time+0x203/0x2b0 [ 287.363002][ C0] ? __pfx_exfat_setattr+0x10/0x10 [ 287.363024][ C0] ? evm_inode_setattr+0x1b2/0x7d0 [ 287.363054][ C0] ? security_inode_setattr+0xd7/0x120 [ 287.363080][ C0] ? __pfx_exfat_setattr+0x10/0x10 [ 287.363106][ C0] notify_change+0xb9d/0xe70 [ 287.363138][ C0] do_truncate+0x220/0x310 [ 287.363166][ C0] ? __pfx_do_truncate+0x10/0x10 [ 287.363192][ C0] path_openat+0x29fe/0x3240 [ 287.363235][ C0] ? __pfx_path_openat+0x10/0x10 [ 287.363271][ C0] do_filp_open+0x235/0x490 [ 287.363300][ C0] ? __pfx_do_filp_open+0x10/0x10 [ 287.363337][ C0] ? _raw_spin_unlock+0x28/0x50 [ 287.363378][ C0] ? alloc_fd+0x59d/0x640 [ 287.363401][ C0] do_sys_openat2+0x13e/0x1d0 [ 287.363425][ C0] ? __pfx_do_sys_openat2+0x10/0x10 [ 287.363449][ C0] ? _raw_spin_unlock_irq+0x2e/0x50 [ 287.363473][ C0] ? ptrace_notify+0x279/0x380 [ 287.363511][ C0] __x64_sys_creat+0x123/0x170 [ 287.363535][ C0] ? __pfx___x64_sys_creat+0x10/0x10 [ 287.363560][ C0] ? do_syscall_64+0x10a/0x240 [ 287.363577][ C0] ? syscall_trace_enter+0x5f/0x150 [ 287.363599][ C0] do_syscall_64+0xfb/0x240 [ 287.363618][ C0] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 287.363639][ C0] RIP: 0033:0x7f8ebb2f8a59 [ 287.363654][ 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 [ 287.363668][ C0] RSP: 002b:00007ffe324dfb68 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 287.363685][ C0] RAX: ffffffffffffffda RBX: 0032656c69662f2e RCX: 00007f8ebb2f8a59 [ 287.363698][ C0] RDX: 00007f8ebb2f8a59 RSI: 0000000000000000 RDI: 0000000020000040 [ 287.363709][ C0] RBP: 00007f8ebb36d5f0 R08: 000055556f3c44c0 R09: 000055556f3c44c0 [ 287.363722][ C0] R10: 00000000000014fa R11: 0000000000000246 R12: 00007ffe324dfb90 [ 287.363733][ C0] R13: 00007ffe324dfdb8 R14: 431bde82d7b634db R15: 00007f8ebb34103b [ 287.363753][ C0] [ 287.363761][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.013 msecs [ 287.876815][ T29] Kernel panic - not syncing: hung_task: blocked tasks [ 287.883691][ T29] CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 [ 287.893187][ T29] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 287.903267][ T29] Call Trace: [ 287.906570][ T29] [ 287.909524][ T29] dump_stack_lvl+0x241/0x360 [ 287.914238][ T29] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.919457][ T29] ? __pfx__printk+0x10/0x10 [ 287.924088][ T29] ? vscnprintf+0x5d/0x90 [ 287.928447][ T29] panic+0x349/0x860 [ 287.932376][ T29] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.938561][ T29] ? __pfx_panic+0x10/0x10 [ 287.943009][ T29] ? tick_nohz_tick_stopped+0x82/0xb0 [ 287.948435][ T29] ? __irq_work_queue_local+0x137/0x3e0 [ 287.954025][ T29] ? preempt_schedule_thunk+0x1a/0x30 [ 287.959421][ T29] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.965601][ T29] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 287.971791][ T29] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 287.978064][ T29] watchdog+0xfef/0xff0 [ 287.982254][ T29] ? watchdog+0x1ea/0xff0 [ 287.986623][ T29] ? __pfx_watchdog+0x10/0x10 [ 287.991330][ T29] kthread+0x2f0/0x390 [ 287.995435][ T29] ? __pfx_watchdog+0x10/0x10 [ 288.000148][ T29] ? __pfx_kthread+0x10/0x10 [ 288.004766][ T29] ret_from_fork+0x4b/0x80 [ 288.009223][ T29] ? __pfx_kthread+0x10/0x10 [ 288.013927][ T29] ret_from_fork_asm+0x1a/0x30 [ 288.018743][ T29] [ 288.021990][ T29] Kernel Offset: disabled [ 288.026320][ T29] Rebooting in 86400 seconds..