./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2991888102 <...> Warning: Permanently added '10.128.10.26' (ED25519) to the list of known hosts. execve("./syz-executor2991888102", ["./syz-executor2991888102"], 0x7ffc4ddcf3f0 /* 10 vars */) = 0 brk(NULL) = 0x555587693000 brk(0x555587693d00) = 0x555587693d00 arch_prctl(ARCH_SET_FS, 0x555587693380) = 0 set_tid_address(0x555587693650) = 5863 set_robust_list(0x555587693660, 24) = 0 rseq(0x555587693ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2991888102", 4096) = 28 getrandom("\x2c\x69\xb5\xe9\x28\xc3\x5b\x3e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555587693d00 brk(0x5555876b4d00) = 0x5555876b4d00 brk(0x5555876b5000) = 0x5555876b5000 mprotect(0x7fea681b8000, 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./strace-static-x86_64: Process 5864 attached [pid 5864] set_robust_list(0x555587693660, 24) = 0 [pid 5864] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5863] <... clone resumed>, child_tidptr=0x555587693650) = 5864 [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) = 0x7fea5fc00000 [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(0x7fea5fc00000, 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 [ 147.413679][ T5864] loop0: detected capacity change from 0 to 256 [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 [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 [ 147.453865][ T5864] exFAT-fs (loop0): failed to load upcase table (idx : 0x000104d0, chksum : 0xda218cab, utbl_chksum : 0xe619d30d) [pid 5864] renameat2(AT_FDCWD, "./file1/file4/file6", AT_FDCWD, "./file1/file4/file7/file6", 0 [pid 5863] kill(-5864, SIGKILL) = 0 [pid 5863] kill(5864, SIGKILL) = 0 [pid 5863] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5863] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5863] getdents64(3, 0x5555876946f0 /* 2 entries */, 32768) = 48 [pid 5863] getdents64(3, 0x5555876946f0 /* 0 entries */, 32768) = 0 [pid 5863] close(3) = 0 [ 429.871397][ T31] INFO: task syz-executor299:5864 blocked for more than 143 seconds. [ 429.879588][ T31] Not tainted 6.16.0-rc5-syzkaller-00266-g3f31a806a62e #0 [ 429.887439][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.896448][ T31] task:syz-executor299 state:D stack:24264 pid:5864 tgid:5864 ppid:5863 task_flags:0x400140 flags:0x00004006 [ 429.908591][ T31] Call Trace: [ 429.911975][ T31] [ 429.914934][ T31] __schedule+0x16a2/0x4cb0 [ 429.919495][ T31] ? __pfx_preempt_schedule_notrace+0x10/0x10 [ 429.925683][ T31] ? schedule+0x165/0x360 [ 429.930075][ T31] ? __pfx___schedule+0x10/0x10 [ 429.935039][ T31] ? schedule+0x91/0x360 [ 429.939331][ T31] schedule+0x165/0x360 [ 429.943608][ T31] schedule_preempt_disabled+0x13/0x30 [ 429.949118][ T31] rwsem_down_write_slowpath+0xbec/0x1030 [ 429.955029][ T31] ? rwsem_down_write_slowpath+0x7ec/0x1030 [ 429.960979][ T31] ? __pfx_rwsem_down_write_slowpath+0x10/0x10 [ 429.967229][ T31] ? __lock_acquire+0xab9/0xd20 [ 429.972186][ T31] ? lock_two_directories+0x16b/0x220 [ 429.977604][ T31] ? mnt_get_write_access+0x68/0x2a0 [ 429.982977][ T31] down_write_nested+0x1b5/0x200 [ 429.987954][ T31] ? __pfx_down_write_nested+0x10/0x10 [ 429.993493][ T31] ? mnt_get_write_access+0x223/0x2a0 [ 429.998929][ T31] lock_two_directories+0x16b/0x220 [ 430.004488][ T31] do_renameat2+0x38a/0xc50 [ 430.009075][ T31] ? __pfx_do_renameat2+0x10/0x10 [ 430.014215][ T31] ? getname_flags+0x1e5/0x540 [ 430.019031][ T31] __x64_sys_renameat2+0xce/0xe0 [ 430.024213][ T31] do_syscall_64+0xfa/0x3b0 [ 430.028759][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.034064][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.040162][ T31] ? clear_bhb_loop+0x60/0xb0 [ 430.044913][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.050839][ T31] RIP: 0033:0x7fea68143c59 [ 430.055353][ T31] RSP: 002b:00007ffed0cbbbd8 EFLAGS: 00000246 ORIG_RAX: 000000000000013c [ 430.063866][ T31] RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007fea68143c59 [ 430.071931][ T31] RDX: 00000000ffffff9c RSI: 0000200000000580 RDI: 00000000ffffff9c [ 430.079930][ T31] RBP: 0000200000000080 R08: 0000000000000000 R09: 00005555876944c0 [ 430.087974][ T31] R10: 00002000000005c0 R11: 0000000000000246 R12: 0031656c69662f2e [ 430.096026][ T31] R13: 00007ffed0cbbe28 R14: 431bde82d7b634db R15: 00007fea6818c03b [ 430.104079][ T31] [ 430.107133][ T31] [ 430.107133][ T31] Showing all locks held in the system: [ 430.115028][ T31] 1 lock held by khungtaskd/31: [ 430.119908][ T31] #0: ffffffff8e13f0a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 430.129907][ T31] 2 locks held by getty/5606: [ 430.134691][ T31] #0: ffff8880312ad0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.144597][ T31] #1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 430.154950][ T31] 4 locks held by syz-executor299/5864: [ 430.160607][ T31] #0: ffff888034eb8428 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 430.169912][ T31] #1: ffff888034eb8738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 [ 430.180242][ T31] #2: ffff88807ddc9c60 (&sb->s_type->i_mutex_key#14/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 [ 430.191720][ T31] #3: ffff88807ddc9c60 (&sb->s_type->i_mutex_key#15/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 [ 430.203182][ T31] [ 430.205583][ T31] ============================================= [ 430.205583][ T31] [ 430.214130][ T31] NMI backtrace for cpu 0 [ 430.214162][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc5-syzkaller-00266-g3f31a806a62e #0 PREEMPT(full) [ 430.214188][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 430.214199][ T31] Call Trace: [ 430.214206][ T31] [ 430.214214][ T31] dump_stack_lvl+0x189/0x250 [ 430.214238][ T31] ? __wake_up_klogd+0xd9/0x110 [ 430.214267][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.214289][ T31] ? __pfx__printk+0x10/0x10 [ 430.214326][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 430.214355][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.214379][ T31] ? _printk+0xcf/0x120 [ 430.214407][ T31] ? __pfx__printk+0x10/0x10 [ 430.214434][ T31] ? debug_show_all_locks+0x2e/0x180 [ 430.214456][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.214490][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 430.214529][ T31] watchdog+0xfee/0x1030 [ 430.214562][ T31] ? watchdog+0x1de/0x1030 [ 430.214600][ T31] kthread+0x711/0x8a0 [ 430.214632][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.214660][ T31] ? __pfx_kthread+0x10/0x10 [ 430.214689][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.214717][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.214746][ T31] ? __pfx_kthread+0x10/0x10 [ 430.214772][ T31] ret_from_fork+0x3fc/0x770 [ 430.214794][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.214821][ T31] ? __switch_to_asm+0x39/0x70 [ 430.214845][ T31] ? __switch_to_asm+0x33/0x70 [ 430.214869][ T31] ? __pfx_kthread+0x10/0x10 [ 430.214897][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.214940][ T31] [ 430.214948][ T31] Sending NMI from CPU 0 to CPUs 1: [ 430.377926][ C1] NMI backtrace for cpu 1 [ 430.377944][ C1] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.16.0-rc5-syzkaller-00266-g3f31a806a62e #0 PREEMPT(full) [ 430.377964][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 430.377975][ C1] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 430.378005][ C1] Code: 93 de 02 00 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 73 fd 1f 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 [ 430.378019][ C1] RSP: 0018:ffffc90000197de0 EFLAGS: 000002c2 [ 430.378035][ C1] RAX: 47f02294845fa500 RBX: ffffffff81976938 RCX: 47f02294845fa500 [ 430.378048][ C1] RDX: 0000000000000001 RSI: ffffffff8d985441 RDI: ffffffff8be1ca00 [ 430.378060][ C1] RBP: ffffc90000197f20 R08: ffff8880b8732f5b R09: 1ffff110170e65eb [ 430.378073][ C1] R10: dffffc0000000000 R11: ffffed10170e65ec R12: ffffffff8fa0cbf0 [ 430.378085][ C1] R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003a57b40 [ 430.378096][ C1] FS: 0000000000000000(0000) GS:ffff888125d4f000(0000) knlGS:0000000000000000 [ 430.378109][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.378121][ C1] CR2: 000055cb5032f660 CR3: 000000000df38000 CR4: 00000000003526f0 [ 430.378137][ C1] Call Trace: [ 430.378146][ C1] [ 430.378153][ C1] default_idle+0x13/0x20 [ 430.378170][ C1] default_idle_call+0x74/0xb0 [ 430.378190][ C1] do_idle+0x1e8/0x510 [ 430.378213][ C1] ? __pfx_do_idle+0x10/0x10 [ 430.378229][ C1] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 430.378253][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.378279][ C1] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 430.378302][ C1] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 430.378331][ C1] cpu_startup_entry+0x44/0x60 [ 430.378350][ C1] start_secondary+0x101/0x110 [ 430.378375][ C1] common_startup_64+0x13e/0x147 [ 430.378406][ C1] [ 430.382813][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.382840][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc5-syzkaller-00266-g3f31a806a62e #0 PREEMPT(full) [ 430.382868][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 430.382884][ T31] Call Trace: [ 430.382895][ T31] [ 430.382907][ T31] dump_stack_lvl+0x99/0x250 [ 430.382940][ T31] ? __asan_memcpy+0x40/0x70 [ 430.382972][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.382999][ T31] ? __pfx__printk+0x10/0x10 [ 430.383073][ T31] panic+0x2db/0x790 [ 430.383103][ T31] ? __pfx_panic+0x10/0x10 [ 430.383128][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 430.383160][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 430.383196][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 430.383237][ T31] watchdog+0x102d/0x1030 [ 430.383275][ T31] ? watchdog+0x1de/0x1030 [ 430.383317][ T31] kthread+0x711/0x8a0 [ 430.383355][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.383389][ T31] ? __pfx_kthread+0x10/0x10 [ 430.383421][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.383454][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.383488][ T31] ? __pfx_kthread+0x10/0x10 [ 430.383519][ T31] ret_from_fork+0x3fc/0x770 [ 430.383546][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.383575][ T31] ? __switch_to_asm+0x39/0x70 [ 430.383612][ T31] ? __switch_to_asm+0x33/0x70 [ 430.383640][ T31] ? __pfx_kthread+0x10/0x10 [ 430.383671][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.383720][ T31] [ 430.711654][ T31] Kernel Offset: disabled [ 430.715989][ T31] Rebooting in 86400 seconds..