./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3947697317 <...> Warning: Permanently added '10.128.1.46' (ED25519) to the list of known hosts. execve("./syz-executor3947697317", ["./syz-executor3947697317"], 0x7ffe1fc8f340 /* 10 vars */) = 0 brk(NULL) = 0x55557c3b5000 brk(0x55557c3b5d00) = 0x55557c3b5d00 arch_prctl(ARCH_SET_FS, 0x55557c3b5380) = 0 set_tid_address(0x55557c3b5650) = 5063 set_robust_list(0x55557c3b5660, 24) = 0 rseq(0x55557c3b5ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3947697317", 4096) = 28 getrandom("\x72\x23\x19\x62\x56\xdc\x7c\xb7", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557c3b5d00 brk(0x55557c3d6d00) = 0x55557c3d6d00 brk(0x55557c3d7000) = 0x55557c3d7000 mprotect(0x7f8c5e799000, 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 5064 attached , child_tidptr=0x55557c3b5650) = 5064 [pid 5064] set_robust_list(0x55557c3b5660, 24) = 0 [pid 5064] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5064] setpgid(0, 0) = 0 [pid 5064] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5064] write(3, "1000", 4) = 4 [pid 5064] close(3) = 0 [pid 5064] memfd_create("syzkaller", 0) = 3 [pid 5064] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c56200000 [pid 5064] 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 5064] munmap(0x7f8c56200000, 138412032) = 0 [pid 5064] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5064] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5064] close(3) = 0 [pid 5064] close(4) = 0 [pid 5064] mkdir("./file2", 0777) = 0 [ 78.303974][ T5064] loop0: detected capacity change from 0 to 256 [pid 5064] mount("/dev/loop0", "./file2", "exfat", 0, "") = 0 [pid 5064] openat(AT_FDCWD, "./file2", O_RDONLY|O_DIRECTORY) = 3 [pid 5064] chdir("./file2") = 0 [pid 5064] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5064] truncate("./file2", 28670) = 0 [ 78.356865][ T5064] exFAT-fs (loop0): failed to load upcase table (idx : 0x0000fd4f, chksum : 0x9563797b, utbl_chksum : 0xe619d30d) [pid 5064] creat("./file2", 000 [pid 5063] kill(-5064, SIGKILL) = 0 [pid 5063] kill(5064, SIGKILL) = 0 [pid 5063] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5063] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5063] getdents64(3, 0x55557c3b66f0 /* 2 entries */, 32768) = 48 [pid 5063] getdents64(3, 0x55557c3b66f0 /* 0 entries */, 32768) = 0 [pid 5063] close(3) = 0 [ 87.148209][ T24] cfg80211: failed to load regulatory.db [ 286.817780][ T29] INFO: task kworker/u8:3:50 blocked for more than 143 seconds. [ 286.825706][ T29] Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 [ 286.834669][ T29] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.843916][ T29] task:kworker/u8:3 state:D stack:23536 pid:50 tgid:50 ppid:2 flags:0x00004000 [ 286.854703][ T29] Workqueue: writeback wb_workfn (flush-7:0) [ 286.861256][ T29] Call Trace: [ 286.864568][ T29] [ 286.867530][ T29] __schedule+0x1781/0x49d0 [ 286.872467][ T29] ? __pfx___schedule+0x10/0x10 [ 286.877373][ T29] ? __blk_flush_plug+0x470/0x500 [ 286.884632][ T29] ? __pfx_lock_release+0x10/0x10 [ 286.890098][ T29] ? __mutex_trylock_common+0x92/0x2e0 [ 286.895613][ T29] ? kthread_data+0x52/0xd0 [ 286.900695][ T29] ? schedule+0x90/0x320 [ 286.905049][ T29] ? wq_worker_sleeping+0x66/0x240 [ 286.910834][ T29] ? schedule+0x90/0x320 [ 286.915147][ T29] schedule+0x14b/0x320 [ 286.919916][ T29] schedule_preempt_disabled+0x13/0x30 [ 286.925437][ T29] __mutex_lock+0x6a4/0xd70 [ 286.930551][ T29] ? __mutex_lock+0x527/0xd70 [ 286.935287][ T29] ? exfat_write_inode+0x69/0x120 [ 286.941433][ T29] ? __pfx___mutex_lock+0x10/0x10 [ 286.946533][ T29] ? do_raw_spin_unlock+0x13c/0x8b0 [ 286.952371][ T29] exfat_write_inode+0x69/0x120 [ 286.957282][ T29] __writeback_single_inode+0x69f/0xfd0 [ 286.963440][ T29] writeback_sb_inodes+0x8e4/0x1220 [ 286.969022][ T29] ? __pfx_lock_acquire+0x10/0x10 [ 286.974088][ T29] ? __pfx_reacquire_held_locks+0x10/0x10 [ 286.980368][ T29] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 286.986099][ T29] ? do_raw_spin_lock+0x14f/0x370 [ 286.991826][ T29] __writeback_inodes_wb+0x11b/0x260 [ 286.997182][ T29] wb_writeback+0x45b/0xc70 [ 287.002262][ T29] ? __pfx_wb_writeback+0x10/0x10 [ 287.007366][ T29] wb_workfn+0xc33/0x1070 [ 287.012223][ T29] ? __pfx_wb_workfn+0x10/0x10 [ 287.017055][ T29] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.023609][ T29] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 287.030318][ T29] ? process_scheduled_works+0x91b/0x1770 [ 287.036087][ T29] process_scheduled_works+0xa00/0x1770 [ 287.042305][ T29] ? __pfx_process_scheduled_works+0x10/0x10 [ 287.048672][ T29] ? assign_work+0x364/0x3d0 [ 287.053516][ T29] worker_thread+0x86d/0xd70 [ 287.059041][ T29] ? __kthread_parkme+0x169/0x1d0 [ 287.064140][ T29] ? __pfx_worker_thread+0x10/0x10 [ 287.069832][ T29] kthread+0x2f0/0x390 [ 287.073952][ T29] ? __pfx_worker_thread+0x10/0x10 [ 287.080015][ T29] ? __pfx_kthread+0x10/0x10 [ 287.084654][ T29] ret_from_fork+0x4b/0x80 [ 287.089589][ T29] ? __pfx_kthread+0x10/0x10 [ 287.094233][ T29] ret_from_fork_asm+0x1a/0x30 [ 287.099582][ T29] [ 287.103733][ T29] [ 287.103733][ T29] Showing all locks held in the system: [ 287.112266][ T29] 1 lock held by khungtaskd/29: [ 287.117159][ T29] #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 [ 287.127714][ T29] 4 locks held by kworker/u8:3/50: [ 287.132961][ T29] #0: ffff88801aa8f148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 [ 287.145101][ T29] #1: ffffc90000ba7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 [ 287.157992][ T29] #2: ffff88802436c0e0 (&type->s_umount_key#44){.+.+}-{3:3}, at: super_trylock_shared+0x22/0xf0 [ 287.171142][ T29] #3: ffff88802436a0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_write_inode+0x69/0x120 [ 287.181158][ T29] 2 locks held by getty/4818: [ 287.185865][ T29] #0: ffff88802af830a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.196258][ T29] #1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 [ 287.206836][ T29] 5 locks held by syz-executor394/5064: [ 287.212744][ T29] [ 287.215103][ T29] ============================================= [ 287.215103][ T29] [ 287.224214][ T29] NMI backtrace for cpu 0 [ 287.228579][ T29] CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 [ 287.238234][ T29] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 287.248336][ T29] Call Trace: [ 287.251649][ T29] [ 287.254609][ T29] dump_stack_lvl+0x241/0x360 [ 287.259323][ T29] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.264549][ T29] ? __pfx__printk+0x10/0x10 [ 287.269179][ T29] ? vprintk_emit+0x631/0x770 [ 287.273894][ T29] ? __pfx_vprintk_emit+0x10/0x10 [ 287.278962][ T29] nmi_cpu_backtrace+0x49c/0x4d0 [ 287.283945][ T29] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.289450][ T29] ? _printk+0xd5/0x120 [ 287.293646][ T29] ? __pfx__printk+0x10/0x10 [ 287.298275][ T29] ? __wake_up_klogd+0xcc/0x110 [ 287.303165][ T29] ? __pfx__printk+0x10/0x10 [ 287.307815][ T29] ? __rcu_read_unlock+0xa1/0x110 [ 287.312928][ T29] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.318970][ T29] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 287.325018][ T29] watchdog+0xfb0/0xff0 [ 287.329355][ T29] ? watchdog+0x1ea/0xff0 [ 287.333744][ T29] ? __pfx_watchdog+0x10/0x10 [ 287.338470][ T29] kthread+0x2f0/0x390 [ 287.342581][ T29] ? __pfx_watchdog+0x10/0x10 [ 287.347298][ T29] ? __pfx_kthread+0x10/0x10 [ 287.351923][ T29] ret_from_fork+0x4b/0x80 [ 287.356380][ T29] ? __pfx_kthread+0x10/0x10 [ 287.361013][ T29] ret_from_fork_asm+0x1a/0x30 [ 287.365833][ T29] [ 287.369054][ T29] Sending NMI from CPU 0 to CPUs 1: [ 287.374314][ C1] NMI backtrace for cpu 1 [ 287.374329][ C1] CPU: 1 PID: 5064 Comm: syz-executor394 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 [ 287.374349][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 287.374360][ C1] RIP: 0010:folio_mark_accessed+0x28/0x11b0 [ 287.374391][ C1] Code: 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 18 49 89 fd 48 bb 00 00 00 00 00 fc ff df e8 6c f4 c5 ff 4d 8d 75 08 <4d> 89 f7 49 c1 ef 03 41 80 3c 1f 00 74 08 4c 89 f7 e8 52 f5 25 00 [ 287.374405][ C1] RSP: 0018:ffffc9000411f090 EFLAGS: 00000293 [ 287.374421][ C1] RAX: ffffffff81ceffe4 RBX: dffffc0000000000 RCX: ffff8880795c8000 [ 287.374435][ C1] RDX: 0000000000000000 RSI: ffffffff8bfdfee0 RDI: ffffea0002ffd580 [ 287.374448][ C1] RBP: ffffc9000411f208 R08: ffffffff8217491a R09: 1ffffffff1f0c1bd [ 287.374461][ C1] R10: dffffc0000000000 R11: fffffbfff1f0c1be R12: ffff8880775b81d0 [ 287.374474][ C1] R13: ffffea0002ffd580 R14: ffffea0002ffd588 R15: 0000000000000200 [ 287.374487][ C1] FS: 000055557c3b5380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 [ 287.374502][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.374514][ C1] CR2: 000056011a2dcbd0 CR3: 0000000023efe000 CR4: 00000000003506f0 [ 287.374530][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.374540][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.374551][ C1] Call Trace: [ 287.374560][ C1] [ 287.374568][ C1] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 287.374591][ C1] ? __pfx_lock_acquire+0x10/0x10 [ 287.374611][ C1] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.374632][ C1] ? nmi_handle+0x2a/0x580 [ 287.374658][ C1] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 287.374680][ C1] ? nmi_handle+0x14f/0x580 [ 287.374697][ C1] ? nmi_handle+0x2a/0x580 [ 287.374715][ C1] ? folio_mark_accessed+0x28/0x11b0 [ 287.374736][ C1] ? default_do_nmi+0x63/0x160 [ 287.374757][ C1] ? exc_nmi+0x123/0x1f0 [ 287.374778][ C1] ? end_repeat_nmi+0xf/0x53 [ 287.374802][ C1] ? touch_buffer+0x8a/0x220 [ 287.374823][ C1] ? folio_mark_accessed+0x24/0x11b0 [ 287.374845][ C1] ? folio_mark_accessed+0x28/0x11b0 [ 287.374873][ C1] ? folio_mark_accessed+0x28/0x11b0 [ 287.374896][ C1] ? folio_mark_accessed+0x28/0x11b0 [ 287.374917][ C1] [ 287.374923][ C1] [ 287.374932][ C1] __find_get_block+0x540/0x10d0 [ 287.374960][ C1] ? __pfx___find_get_block+0x10/0x10 [ 287.374985][ C1] ? __pfx___might_resched+0x10/0x10 [ 287.375010][ C1] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.375031][ C1] bdev_getblk+0x38/0x610 [ 287.375063][ C1] __bread_gfp+0xac/0x430 [ 287.375089][ C1] exfat_ent_get+0x14d/0x400 [ 287.375114][ C1] __exfat_free_cluster+0x56f/0x990 [ 287.375143][ C1] ? __pfx___exfat_free_cluster+0x10/0x10 [ 287.375168][ C1] ? do_raw_spin_unlock+0x13c/0x8b0 [ 287.375194][ C1] exfat_free_cluster+0x77/0xd0 [ 287.375217][ C1] __exfat_truncate+0x747/0xa60 [ 287.375246][ C1] ? __pfx___exfat_truncate+0x10/0x10 [ 287.375270][ C1] ? unmap_mapping_range+0xf8/0x290 [ 287.375294][ C1] ? __pfx_unmap_mapping_range+0x10/0x10 [ 287.375317][ C1] exfat_truncate+0xe6/0x380 [ 287.375340][ C1] ? truncate_setsize+0xcf/0xf0 [ 287.375367][ C1] exfat_setattr+0x1067/0x1930 [ 287.375395][ C1] ? __pfx_smack_inode_setattr+0x10/0x10 [ 287.375425][ C1] ? current_time+0x203/0x2b0 [ 287.375447][ C1] ? __pfx_exfat_setattr+0x10/0x10 [ 287.375469][ C1] ? evm_inode_setattr+0x1b2/0x7d0 [ 287.375500][ C1] ? security_inode_setattr+0xd7/0x120 [ 287.375516][ C1] ? __pfx_exfat_setattr+0x10/0x10 [ 287.375540][ C1] notify_change+0xb9d/0xe70 [ 287.375573][ C1] do_truncate+0x220/0x310 [ 287.375591][ C1] ? __pfx_do_truncate+0x10/0x10 [ 287.375618][ C1] path_openat+0x29fe/0x3240 [ 287.375666][ C1] ? __pfx_path_openat+0x10/0x10 [ 287.375705][ C1] do_filp_open+0x235/0x490 [ 287.375733][ C1] ? __pfx_do_filp_open+0x10/0x10 [ 287.375773][ C1] ? _raw_spin_unlock+0x28/0x50 [ 287.375797][ C1] ? alloc_fd+0x59d/0x640 [ 287.375820][ C1] do_sys_openat2+0x13e/0x1d0 [ 287.375846][ C1] ? __pfx_do_sys_openat2+0x10/0x10 [ 287.375878][ C1] ? _raw_spin_unlock_irq+0x2e/0x50 [ 287.375903][ C1] ? ptrace_notify+0x279/0x380 [ 287.375933][ C1] __x64_sys_creat+0x123/0x170 [ 287.375957][ C1] ? __pfx___x64_sys_creat+0x10/0x10 [ 287.375983][ C1] ? do_syscall_64+0x10a/0x240 [ 287.376002][ C1] ? syscall_trace_enter+0x5f/0x150 [ 287.376024][ C1] do_syscall_64+0xfb/0x240 [ 287.376044][ C1] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 287.376064][ C1] RIP: 0033:0x7f8c5e724a59 [ 287.376081][ C1] 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 [ 287.376094][ C1] RSP: 002b:00007ffd2ca4a678 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 287.376111][ C1] RAX: ffffffffffffffda RBX: 0032656c69662f2e RCX: 00007f8c5e724a59 [ 287.376124][ C1] RDX: 00007f8c5e724a59 RSI: 0000000000000000 RDI: 0000000020000040 [ 287.376136][ C1] RBP: 00007f8c5e7995f0 R08: 000055557c3b64c0 R09: 000055557c3b64c0 [ 287.376148][ C1] R10: 00000000000014fa R11: 0000000000000246 R12: 00007ffd2ca4a6a0 [ 287.376160][ C1] R13: 00007ffd2ca4a8c8 R14: 431bde82d7b634db R15: 00007f8c5e76d03b [ 287.376182][ C1] [ 287.376189][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.875 msecs [ 287.903548][ T29] Kernel panic - not syncing: hung_task: blocked tasks [ 287.910435][ T29] CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 [ 287.920722][ T29] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 287.930829][ T29] Call Trace: [ 287.934141][ T29] [ 287.937093][ T29] dump_stack_lvl+0x241/0x360 [ 287.941812][ T29] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.947071][ T29] ? __pfx__printk+0x10/0x10 [ 287.951722][ T29] ? vscnprintf+0x5d/0x90 [ 287.956088][ T29] panic+0x349/0x860 [ 287.960023][ T29] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.966215][ T29] ? __pfx_panic+0x10/0x10 [ 287.970666][ T29] ? tick_nohz_tick_stopped+0x82/0xb0 [ 287.976073][ T29] ? __irq_work_queue_local+0x137/0x3e0 [ 287.981740][ T29] ? preempt_schedule_thunk+0x1a/0x30 [ 287.987167][ T29] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.993364][ T29] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 287.999561][ T29] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 288.006186][ T29] watchdog+0xfef/0xff0 [ 288.010389][ T29] ? watchdog+0x1ea/0xff0 [ 288.014765][ T29] ? __pfx_watchdog+0x10/0x10 [ 288.019484][ T29] kthread+0x2f0/0x390 [ 288.023937][ T29] ? __pfx_watchdog+0x10/0x10 [ 288.028657][ T29] ? __pfx_kthread+0x10/0x10 [ 288.033290][ T29] ret_from_fork+0x4b/0x80 [ 288.037742][ T29] ? __pfx_kthread+0x10/0x10 [ 288.042367][ T29] ret_from_fork_asm+0x1a/0x30 [ 288.047184][ T29] [ 288.050473][ T29] Kernel Offset: disabled [ 288.054803][ T29] Rebooting in 86400 seconds..