./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1346993560 <...> Warning: Permanently added '10.128.1.62' (ED25519) to the list of known hosts. execve("./syz-executor1346993560", ["./syz-executor1346993560"], 0x7ffe1ce35c20 /* 10 vars */) = 0 brk(NULL) = 0x55557826a000 brk(0x55557826ad00) = 0x55557826ad00 arch_prctl(ARCH_SET_FS, 0x55557826a380) = 0 set_tid_address(0x55557826a650) = 5862 set_robust_list(0x55557826a660, 24) = 0 rseq(0x55557826aca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1346993560", 4096) = 28 getrandom("\xd6\x55\x09\x5b\xcc\xf5\x74\x09", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557826ad00 brk(0x55557828bd00) = 0x55557828bd00 brk(0x55557828c000) = 0x55557828c000 mprotect(0x7ffa2b021000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 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, child_tidptr=0x55557826a650) = 5864 ./strace-static-x86_64: Process 5864 attached [pid 5864] set_robust_list(0x55557826a660, 24) = 0 [pid 5864] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5864] setpgid(0, 0) = 0 [pid 5864] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5864] write(3, "1000", 4) = 4 [pid 5864] close(3) = 0 [pid 5864] write(1, "executing program\n", 18executing program ) = 18 [pid 5864] memfd_create("syzkaller", 0) = 3 [pid 5864] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ffa22a00000 [pid 5864] 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 5864] munmap(0x7ffa22a00000, 138412032) = 0 [pid 5864] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5864] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5864] close(3) = 0 [pid 5864] close(4) = 0 [pid 5864] mkdir("./file1", 0777) = 0 [pid 5864] mount("/dev/loop0", "./file1", "exfat", MS_LAZYTIME, "errors=continue,") = 0 [pid 5864] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5864] chdir("./file1") = 0 [pid 5864] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5864] mkdir("./bus", 000) = 0 [pid 5864] rename("./file1", "./bus/file1") = 0 [pid 5864] mkdirat(AT_FDCWD, "./file1", 0700) = 0 [ 131.933635][ T5864] loop0: detected capacity change from 0 to 256 [ 131.969460][ T5864] exFAT-fs (loop0): failed to load upcase table (idx : 0x000104d0, chksum : 0xda218cab, utbl_chksum : 0xe619d30d) [pid 5864] mkdirat(AT_FDCWD, "./file1/file4", 0704) = 0 [pid 5864] mkdirat(AT_FDCWD, "./file1/file4/file6", 0700) = 0 [pid 5864] mkdirat(AT_FDCWD, "./file1/file4/file7", 0711) = 0 [pid 5864] renameat2(AT_FDCWD, "./file1/file4/file6", AT_FDCWD, "./file1/file4/file7/file6", 0 [pid 5862] kill(-5864, SIGKILL) = 0 [pid 5862] kill(5864, SIGKILL) = 0 [pid 5862] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5862] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5862] getdents64(3, 0x55557826b6f0 /* 2 entries */, 32768) = 48 [pid 5862] getdents64(3, 0x55557826b6f0 /* 0 entries */, 32768) = 0 [pid 5862] close(3) = 0 [ 286.507117][ T31] INFO: task syz-executor134:5864 blocked for more than 143 seconds. [ 286.515404][ T31] Not tainted 6.16.0-rc5-syzkaller-00121-gbc9ff192a6c9 #0 [ 286.523040][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.531860][ T31] task:syz-executor134 state:D stack:23944 pid:5864 tgid:5864 ppid:5862 task_flags:0x400140 flags:0x00004006 [ 286.543928][ T31] Call Trace: [ 286.547759][ T31] [ 286.550729][ T31] __schedule+0x16a2/0x4cb0 [ 286.555362][ T31] ? __pfx_preempt_schedule_notrace+0x10/0x10 [ 286.561471][ T31] ? schedule+0x165/0x360 [ 286.565904][ T31] ? __pfx___schedule+0x10/0x10 [ 286.570887][ T31] ? schedule+0x91/0x360 [ 286.575228][ T31] schedule+0x165/0x360 [ 286.579426][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.584940][ T31] rwsem_down_write_slowpath+0xbec/0x1030 [ 286.590701][ T31] ? rwsem_down_write_slowpath+0x7ec/0x1030 [ 286.596683][ T31] ? __pfx_rwsem_down_write_slowpath+0x10/0x10 [ 286.602884][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.607811][ T31] ? lock_two_directories+0x16b/0x220 [ 286.613229][ T31] ? mnt_get_write_access+0x68/0x2a0 [ 286.618597][ T31] down_write_nested+0x1b5/0x200 [ 286.623569][ T31] ? __pfx_down_write_nested+0x10/0x10 [ 286.629107][ T31] ? mnt_get_write_access+0x223/0x2a0 [ 286.634527][ T31] lock_two_directories+0x16b/0x220 [ 286.639846][ T31] do_renameat2+0x38a/0xc50 [ 286.644662][ T31] ? __pfx_do_renameat2+0x10/0x10 [ 286.649771][ T31] ? getname_flags+0x1e5/0x540 [ 286.654568][ T31] __x64_sys_renameat2+0xce/0xe0 [ 286.659594][ T31] do_syscall_64+0xfa/0x3b0 [ 286.664120][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.669414][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.675576][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.680304][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.686287][ T31] RIP: 0033:0x7ffa2afacc59 [ 286.690750][ T31] RSP: 002b:00007ffff5449978 EFLAGS: 00000246 ORIG_RAX: 000000000000013c [ 286.699253][ T31] RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007ffa2afacc59 [ 286.707282][ T31] RDX: 00000000ffffff9c RSI: 0000200000000580 RDI: 00000000ffffff9c [ 286.715328][ T31] RBP: 0000200000000080 R08: 0000000000000000 R09: 000055557826b4c0 [ 286.723316][ T31] R10: 00002000000005c0 R11: 0000000000000246 R12: 0031656c69662f2e [ 286.731345][ T31] R13: 00007ffff5449bc8 R14: 431bde82d7b634db R15: 00007ffa2aff503b [ 286.739436][ T31] [ 286.742480][ T31] [ 286.742480][ T31] Showing all locks held in the system: [ 286.750275][ T31] 1 lock held by khungtaskd/31: [ 286.755177][ T31] #0: ffffffff8e13f160 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.765205][ T31] 2 locks held by getty/5597: [ 286.769901][ T31] #0: ffff8880355120a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.779722][ T31] #1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.789926][ T31] 4 locks held by syz-executor134/5864: [ 286.795548][ T31] #0: ffff888035c7c428 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 286.804812][ T31] #1: ffff888035c7c738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 [ 286.815119][ T31] #2: ffff888077e60910 (&sb->s_type->i_mutex_key#14/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 [ 286.826566][ T31] #3: ffff888077e60910 (&sb->s_type->i_mutex_key#15/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 [ 286.838013][ T31] [ 286.840343][ T31] ============================================= [ 286.840343][ T31] [ 286.848816][ T31] NMI backtrace for cpu 1 [ 286.848839][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc5-syzkaller-00121-gbc9ff192a6c9 #0 PREEMPT(full) [ 286.848860][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 286.848871][ T31] Call Trace: [ 286.848878][ T31] [ 286.848885][ T31] dump_stack_lvl+0x189/0x250 [ 286.848911][ T31] ? __wake_up_klogd+0xd9/0x110 [ 286.848939][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.848960][ T31] ? __pfx__printk+0x10/0x10 [ 286.849007][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 286.849033][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 286.849054][ T31] ? _printk+0xcf/0x120 [ 286.849081][ T31] ? __pfx__printk+0x10/0x10 [ 286.849106][ T31] ? debug_show_all_locks+0x2e/0x180 [ 286.849126][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.849168][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 286.849197][ T31] watchdog+0xfee/0x1030 [ 286.849228][ T31] ? watchdog+0x1de/0x1030 [ 286.849263][ T31] kthread+0x711/0x8a0 [ 286.849293][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.849319][ T31] ? __pfx_kthread+0x10/0x10 [ 286.849345][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.849372][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.849398][ T31] ? __pfx_kthread+0x10/0x10 [ 286.849424][ T31] ret_from_fork+0x3fc/0x770 [ 286.849446][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.849471][ T31] ? __switch_to_asm+0x39/0x70 [ 286.849493][ T31] ? __switch_to_asm+0x33/0x70 [ 286.849515][ T31] ? __pfx_kthread+0x10/0x10 [ 286.849539][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.849573][ T31] [ 286.849581][ T31] Sending NMI from CPU 1 to CPUs 0: [ 287.011891][ C0] NMI backtrace for cpu 0 [ 287.011909][ C0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.16.0-rc5-syzkaller-00121-gbc9ff192a6c9 #0 PREEMPT(full) [ 287.011929][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.011940][ C0] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 287.011970][ C0] Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 93 1d 20 00 f3 0f 1e fa fb f4 88 dd 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 [ 287.011984][ C0] RSP: 0018:ffffffff8de07d80 EFLAGS: 000002c6 [ 287.012000][ C0] RAX: 0ad6c54926cb1f00 RBX: ffffffff81976b68 RCX: 0ad6c54926cb1f00 [ 287.012013][ C0] RDX: 0000000000000001 RSI: ffffffff8d985220 RDI: ffffffff8be1ca40 [ 287.012025][ C0] RBP: ffffffff8de07ea8 R08: ffff8880b8632f5b R09: 1ffff110170c65eb [ 287.012037][ C0] R10: dffffc0000000000 R11: ffffed10170c65ec R12: ffffffff8fa0c9f0 [ 287.012050][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1bd2a50 [ 287.012061][ C0] FS: 0000000000000000(0000) GS:ffff888125c4f000(0000) knlGS:0000000000000000 [ 287.012074][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.012086][ C0] CR2: 000055cb367dc660 CR3: 000000000df38000 CR4: 00000000003526f0 [ 287.012101][ C0] Call Trace: [ 287.012110][ C0] [ 287.012117][ C0] default_idle+0x13/0x20 [ 287.012135][ C0] default_idle_call+0x74/0xb0 [ 287.012154][ C0] do_idle+0x1e8/0x510 [ 287.012176][ C0] ? __pfx_do_idle+0x10/0x10 [ 287.012194][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.012219][ C0] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 287.012243][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 287.012270][ C0] cpu_startup_entry+0x44/0x60 [ 287.012288][ C0] rest_init+0x2de/0x300 [ 287.012306][ C0] ? __pfx_x86_late_time_init+0x10/0x10 [ 287.012342][ C0] start_kernel+0x47d/0x500 [ 287.012364][ C0] x86_64_start_reservations+0x24/0x30 [ 287.012388][ C0] x86_64_start_kernel+0x143/0x1c0 [ 287.012425][ C0] common_startup_64+0x13e/0x147 [ 287.012456][ C0] [ 287.012950][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.012976][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc5-syzkaller-00121-gbc9ff192a6c9 #0 PREEMPT(full) [ 287.013003][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.013015][ T31] Call Trace: [ 287.013024][ T31] [ 287.013033][ T31] dump_stack_lvl+0x99/0x250 [ 287.013061][ T31] ? __asan_memcpy+0x40/0x70 [ 287.013088][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.013113][ T31] ? __pfx__printk+0x10/0x10 [ 287.013179][ T31] panic+0x2db/0x790 [ 287.013211][ T31] ? __pfx_panic+0x10/0x10 [ 287.013234][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 287.013265][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.013301][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 287.013339][ T31] watchdog+0x102d/0x1030 [ 287.013377][ T31] ? watchdog+0x1de/0x1030 [ 287.013420][ T31] kthread+0x711/0x8a0 [ 287.013455][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.013486][ T31] ? __pfx_kthread+0x10/0x10 [ 287.013519][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.013550][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.013582][ T31] ? __pfx_kthread+0x10/0x10 [ 287.013612][ T31] ret_from_fork+0x3fc/0x770 [ 287.013638][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.013668][ T31] ? __switch_to_asm+0x39/0x70 [ 287.013693][ T31] ? __switch_to_asm+0x33/0x70 [ 287.013720][ T31] ? __pfx_kthread+0x10/0x10 [ 287.013752][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.013797][ T31] [ 287.360861][ T31] Kernel Offset: disabled [ 287.365203][ T31] Rebooting in 86400 seconds..