./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2372314269 <...> Warning: Permanently added '10.128.0.202' (ED25519) to the list of known hosts. execve("./syz-executor2372314269", ["./syz-executor2372314269"], 0x7fff086fda50 /* 10 vars */) = 0 brk(NULL) = 0x555591452000 brk(0x555591452d00) = 0x555591452d00 arch_prctl(ARCH_SET_FS, 0x555591452380) = 0 set_tid_address(0x555591452650) = 5862 set_robust_list(0x555591452660, 24) = 0 rseq(0x555591452ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2372314269", 4096) = 28 getrandom("\xcf\x3a\x6b\x4b\xfd\x81\xa7\x84", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555591452d00 brk(0x555591473d00) = 0x555591473d00 brk(0x555591474000) = 0x555591474000 mprotect(0x7f9bdc998000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555591452650) = 5863 ./strace-static-x86_64: Process 5863 attached [pid 5863] set_robust_list(0x555591452660, 24) = 0 [pid 5863] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5863] setpgid(0, 0) = 0 [pid 5863] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5863] write(3, "1000", 4) = 4 [pid 5863] close(3) = 0 executing program [pid 5863] write(1, "executing program\n", 18) = 18 [pid 5863] creat("./file0", 000) = 3 [pid 5863] pipe2([4, 5], 0) = 0 [pid 5863] write(5, "\x15\x00\x00\x00\x65\xff\xff\x04\x80\x00\x00\x08\x00\x39\x50\x32\x30\x30\x30\x00\x00", 21) = 21 [pid 5863] dup(5) = 6 [pid 5863] write(6, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 24) = 24 [pid 5863] write(6, "\x4c\x01\x00\x00\x05\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\x18\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"..., 311) = 311 [pid 5863] mount(NULL, "./file0", "9p", MS_SYNCHRONOUS|MS_REC, "trans=fd,rfdno=0x0000000000000004,wfdno=0x0000000000000006,cache=mmap,k") = 0 [pid 5863] chmod("./file0", 000) = 0 [pid 5863] open("./file0", O_WRONLY) = 7 [pid 5863] write(7, "\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\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"..., 32748 [pid 5862] kill(-5863, SIGKILL) = 0 [pid 5862] kill(5863, 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, 0x5555914536f0 /* 2 entries */, 32768) = 48 [pid 5862] getdents64(3, 0x5555914536f0 /* 0 entries */, 32768) = 0 [pid 5862] close(3) = 0 [ 286.890603][ T32] INFO: task syz-executor237:5863 blocked for more than 143 seconds. [ 286.899069][ T32] Not tainted 6.16.0-syzkaller #0 [ 286.904666][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.913561][ T32] task:syz-executor237 state:D stack:25432 pid:5863 tgid:5863 ppid:5862 task_flags:0x400140 flags:0x00004006 [ 286.925612][ T32] Call Trace: [ 286.929030][ T32] [ 286.932001][ T32] __schedule+0x16aa/0x4c90 [ 286.936571][ T32] ? schedule+0x165/0x360 [ 286.941008][ T32] ? __pfx___schedule+0x10/0x10 [ 286.946400][ T32] ? schedule+0x91/0x360 [ 286.950970][ T32] schedule+0x165/0x360 [ 286.955833][ T32] io_schedule+0x81/0xe0 [ 286.960397][ T32] folio_wait_bit_common+0x6b0/0xb90 [ 286.966221][ T32] ? __pfx_folio_wait_bit_common+0x10/0x10 [ 286.972203][ T32] ? __pfx_wake_page_function+0x10/0x10 [ 286.977822][ T32] ? __pfx_filemap_get_folios_tag+0x10/0x10 [ 286.983857][ T32] ? __lock_acquire+0xab9/0xd20 [ 286.988912][ T32] ? rcu_is_watching+0x15/0xb0 [ 286.993715][ T32] folio_wait_writeback+0xb0/0x100 [ 286.998936][ T32] __filemap_fdatawait_range+0x147/0x230 [ 287.004655][ T32] ? __pfx___filemap_fdatawait_range+0x10/0x10 [ 287.010974][ T32] ? wbc_detach_inode+0x137/0x750 [ 287.016052][ T32] file_write_and_wait_range+0x275/0x330 [ 287.021957][ T32] ? __pfx_file_write_and_wait_range+0x10/0x10 [ 287.028213][ T32] v9fs_file_fsync+0xcf/0x1a0 [ 287.033021][ T32] ? __pfx_v9fs_file_fsync+0x10/0x10 [ 287.038356][ T32] ? __up_read+0x280/0x680 [ 287.042867][ T32] ? __pfx___up_read+0x10/0x10 [ 287.047709][ T32] ? netfs_file_write_iter+0x189/0x4a0 [ 287.053368][ T32] netfs_file_write_iter+0x3d8/0x4a0 [ 287.058840][ T32] vfs_write+0x54b/0xa90 [ 287.063168][ T32] ? __pfx_v9fs_file_write_iter+0x10/0x10 [ 287.069168][ T32] ? __pfx_vfs_write+0x10/0x10 [ 287.073996][ T32] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.079310][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 287.084557][ T32] ksys_write+0x145/0x250 [ 287.089002][ T32] ? __pfx_ksys_write+0x10/0x10 [ 287.093904][ T32] ? rcu_is_watching+0x15/0xb0 [ 287.098723][ T32] do_syscall_64+0xfa/0x3b0 [ 287.103549][ T32] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.108894][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.115300][ T32] ? clear_bhb_loop+0x60/0xb0 [ 287.120133][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.126095][ T32] RIP: 0033:0x7f9bdc924ef9 [ 287.130621][ T32] RSP: 002b:00007ffcec9843a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 287.139135][ T32] RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007f9bdc924ef9 [ 287.147230][ T32] RDX: 0000000000007fec RSI: 0000200000000300 RDI: 0000000000000007 [ 287.155407][ T32] RBP: 0030656c69662f2e R08: 0000000000000006 R09: 0000000000000006 [ 287.163469][ T32] R10: 0000000000000006 R11: 0000000000000246 R12: 0000200000000180 [ 287.171670][ T32] R13: 00007f9bdc96e04e R14: 0000000000000001 R15: 0000000000000001 [ 287.179748][ T32] [ 287.182850][ T32] [ 287.182850][ T32] Showing all locks held in the system: [ 287.190713][ T32] 5 locks held by kworker/u8:2/30: [ 287.195861][ T32] #0: ffff8880b8739e18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 [ 287.206033][ T32] #1: ffff8880b8723f08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x318/0x6d0 [ 287.217590][ T32] #2: ffffffff99ca90f0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_deactivate+0x9a/0x250 [ 287.228304][ T32] #3: ffffffff99d06b70 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0xbb/0x420 [ 287.238751][ T32] #4: ffffffff8dfea988 (text_mutex){+.+.}-{4:4}, at: arch_jump_label_transform_apply+0x17/0x30 [ 287.249442][ T32] 1 lock held by khungtaskd/32: [ 287.254350][ T32] #0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 287.264299][ T32] 2 locks held by kworker/u8:4/64: [ 287.269491][ T32] #0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 287.281242][ T32] #1: ffffc9000215fbc0 ((work_completion)(&rreq->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 287.293141][ T32] 2 locks held by getty/5595: [ 287.297849][ T32] #0: ffff888030dea0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.307748][ T32] #1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 287.318284][ T32] 1 lock held by syz-executor237/5863: [ 287.323934][ T32] #0: ffff888079d1e428 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x211/0xa90 [ 287.333125][ T32] [ 287.335473][ T32] ============================================= [ 287.335473][ T32] [ 287.343982][ T32] NMI backtrace for cpu 0 [ 287.344007][ T32] CPU: 0 UID: 0 PID: 32 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 287.344030][ T32] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.344043][ T32] Call Trace: [ 287.344054][ T32] [ 287.344065][ T32] dump_stack_lvl+0x189/0x250 [ 287.344092][ T32] ? __wake_up_klogd+0xd9/0x110 [ 287.344121][ T32] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.344141][ T32] ? __pfx__printk+0x10/0x10 [ 287.344180][ T32] nmi_cpu_backtrace+0x39e/0x3d0 [ 287.344215][ T32] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.344242][ T32] ? _printk+0xcf/0x120 [ 287.344273][ T32] ? __pfx__printk+0x10/0x10 [ 287.344299][ T32] ? debug_show_all_locks+0x2e/0x180 [ 287.344321][ T32] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.344357][ T32] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 287.344393][ T32] watchdog+0xfee/0x1030 [ 287.344429][ T32] ? watchdog+0x1de/0x1030 [ 287.344469][ T32] kthread+0x70e/0x8a0 [ 287.344503][ T32] ? __pfx_watchdog+0x10/0x10 [ 287.344533][ T32] ? __pfx_kthread+0x10/0x10 [ 287.344564][ T32] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.344584][ T32] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.344604][ T32] ? __pfx_kthread+0x10/0x10 [ 287.344634][ T32] ret_from_fork+0x3fc/0x770 [ 287.344670][ T32] ? __pfx_ret_from_fork+0x10/0x10 [ 287.344698][ T32] ? __switch_to_asm+0x39/0x70 [ 287.344723][ T32] ? __switch_to_asm+0x33/0x70 [ 287.344749][ T32] ? __pfx_kthread+0x10/0x10 [ 287.344778][ T32] ret_from_fork_asm+0x1a/0x30 [ 287.344818][ T32] [ 287.344826][ T32] Sending NMI from CPU 0 to CPUs 1: [ 287.507436][ C1] NMI backtrace for cpu 1 [ 287.507455][ C1] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 287.507475][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.507486][ C1] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 287.507511][ C1] Code: 53 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 d3 ad 21 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 [ 287.507527][ C1] RSP: 0018:ffffc90000197de0 EFLAGS: 000002c2 [ 287.507543][ C1] RAX: e83a8c18c113fa00 RBX: ffffffff81976918 RCX: e83a8c18c113fa00 [ 287.507557][ C1] RDX: 0000000000000001 RSI: ffffffff8d982fba RDI: ffffffff8be1ba40 [ 287.507569][ C1] RBP: ffffc90000197f20 R08: ffff8880b8732f5b R09: 1ffff110170e65eb [ 287.507583][ C1] R10: dffffc0000000000 R11: ffffed10170e65ec R12: ffffffff8fa0b3f0 [ 287.507596][ C1] R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003a57b40 [ 287.507608][ C1] FS: 0000000000000000(0000) GS:ffff888125d57000(0000) knlGS:0000000000000000 [ 287.507622][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.507635][ C1] CR2: 000055d132d55660 CR3: 000000000df38000 CR4: 00000000003526f0 [ 287.507651][ C1] Call Trace: [ 287.507661][ C1] [ 287.507668][ C1] default_idle+0x13/0x20 [ 287.507692][ C1] default_idle_call+0x74/0xb0 [ 287.507716][ C1] do_idle+0x1e8/0x510 [ 287.507736][ C1] ? asm_common_interrupt+0x26/0x40 [ 287.507755][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.507774][ C1] ? __pfx_do_idle+0x10/0x10 [ 287.507798][ C1] ? do_idle+0x4ef/0x510 [ 287.507819][ C1] cpu_startup_entry+0x44/0x60 [ 287.507838][ C1] start_secondary+0x101/0x110 [ 287.507865][ C1] common_startup_64+0x13e/0x147 [ 287.507897][ C1] [ 287.508870][ T32] Kernel panic - not syncing: hung_task: blocked tasks [ 287.508902][ T32] CPU: 0 UID: 0 PID: 32 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 287.508931][ T32] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.508945][ T32] Call Trace: [ 287.508956][ T32] [ 287.508966][ T32] dump_stack_lvl+0x99/0x250 [ 287.509000][ T32] ? __asan_memcpy+0x40/0x70 [ 287.509037][ T32] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.509065][ T32] ? __pfx__printk+0x10/0x10 [ 287.509111][ T32] panic+0x2db/0x790 [ 287.509145][ T32] ? __pfx_panic+0x10/0x10 [ 287.509171][ T32] ? nmi_backtrace_stall_check+0x433/0x440 [ 287.509203][ T32] ? preempt_schedule_thunk+0x16/0x30 [ 287.509243][ T32] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 287.509289][ T32] watchdog+0x102d/0x1030 [ 287.509328][ T32] ? watchdog+0x1de/0x1030 [ 287.509374][ T32] kthread+0x70e/0x8a0 [ 287.509411][ T32] ? __pfx_watchdog+0x10/0x10 [ 287.509447][ T32] ? __pfx_kthread+0x10/0x10 [ 287.509483][ T32] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.509507][ T32] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.509531][ T32] ? __pfx_kthread+0x10/0x10 [ 287.509565][ T32] ret_from_fork+0x3fc/0x770 [ 287.509594][ T32] ? __pfx_ret_from_fork+0x10/0x10 [ 287.509626][ T32] ? __switch_to_asm+0x39/0x70 [ 287.509655][ T32] ? __switch_to_asm+0x33/0x70 [ 287.509683][ T32] ? __pfx_kthread+0x10/0x10 [ 287.509726][ T32] ret_from_fork_asm+0x1a/0x30 [ 287.509774][ T32] [ 287.832053][ T32] Kernel Offset: disabled [ 287.836429][ T32] Rebooting in 86400 seconds..