./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1088554269 <...> Warning: Permanently added '10.128.1.97' (ED25519) to the list of known hosts. execve("./syz-executor1088554269", ["./syz-executor1088554269"], 0x7fffe7cd4020 /* 10 vars */) = 0 brk(NULL) = 0x55557dcfd000 brk(0x55557dcfdd00) = 0x55557dcfdd00 arch_prctl(ARCH_SET_FS, 0x55557dcfd380) = 0 set_tid_address(0x55557dcfd650) = 5863 set_robust_list(0x55557dcfd660, 24) = 0 rseq(0x55557dcfdca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1088554269", 4096) = 28 getrandom("\x9c\x7c\xa3\xc7\x18\x43\x58\x94", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557dcfdd00 brk(0x55557dd1ed00) = 0x55557dd1ed00 brk(0x55557dd1f000) = 0x55557dd1f000 mprotect(0x7f9c642b2000, 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./strace-static-x86_64: Process 5864 attached [pid 5864] set_robust_list(0x55557dcfd660, 24 [pid 5863] <... clone resumed>, child_tidptr=0x55557dcfd650) = 5864 [pid 5864] <... set_robust_list resumed>) = 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] creat("./file0", 000) = 3 [pid 5864] pipe2([4, 5], 0) = 0 [pid 5864] 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 5864] dup(5) = 6 [pid 5864] 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 5864] 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 5864] mount(NULL, "./file0", "9p", MS_SYNCHRONOUS|MS_REC, "trans=fd,rfdno=0x0000000000000004,wfdno=0x0000000000000006,cache=mmap,k") = -1 EIO (Input/output error) [pid 5864] chmod("./file0", 000) = 0 [pid 5864] open("./file0", O_WRONLY) = 7 [pid 5864] 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) = 32748 [pid 5864] exit_group(0) = ? [pid 5864] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5864, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5866 attached , child_tidptr=0x55557dcfd650) = 5866 [pid 5866] set_robust_list(0x55557dcfd660, 24) = 0 [pid 5866] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5866] setpgid(0, 0) = 0 [pid 5866] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5866] write(3, "1000", 4) = 4 [pid 5866] close(3) = 0 [pid 5866] write(1, "executing program\n", 18executing program ) = 18 [pid 5866] creat("./file0", 000) = 3 [pid 5866] pipe2([4, 5], 0) = 0 [pid 5866] 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 5866] dup(5) = 6 [pid 5866] 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 5866] 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 5866] mount(NULL, "./file0", "9p", MS_SYNCHRONOUS|MS_REC, "trans=fd,rfdno=0x0000000000000004,wfdno=0x0000000000000006,cache=mmap,k") = 0 [pid 5866] chmod("./file0", 000) = 0 [pid 5866] open("./file0", O_WRONLY) = 7 [pid 5866] 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 5863] kill(-5866, SIGKILL) = 0 [pid 5863] kill(5866, 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, 0x55557dcfe6f0 /* 2 entries */, 32768) = 48 [pid 5863] getdents64(3, 0x55557dcfe6f0 /* 0 entries */, 32768) = 0 [pid 5863] close(3) = 0 [ 429.694339][ T31] INFO: task syz-executor108:5866 blocked for more than 143 seconds. [ 429.702514][ T31] Not tainted 6.16.0-syzkaller #0 [ 429.708160][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.716981][ T31] task:syz-executor108 state:D stack:25640 pid:5866 tgid:5866 ppid:5863 task_flags:0x400140 flags:0x00004006 [ 429.729130][ T31] Call Trace: [ 429.732421][ T31] [ 429.735404][ T31] __schedule+0x16aa/0x4c90 [ 429.739944][ T31] ? schedule+0x165/0x360 [ 429.744322][ T31] ? __pfx___schedule+0x10/0x10 [ 429.749190][ T31] ? schedule+0x91/0x360 [ 429.753429][ T31] schedule+0x165/0x360 [ 429.757614][ T31] io_schedule+0x81/0xe0 [ 429.761860][ T31] folio_wait_bit_common+0x6b0/0xb90 [ 429.767229][ T31] ? __pfx_folio_wait_bit_common+0x10/0x10 [ 429.773053][ T31] ? __pfx_wake_page_function+0x10/0x10 [ 429.778677][ T31] ? __pfx_filemap_get_folios_tag+0x10/0x10 [ 429.784707][ T31] ? __lock_acquire+0xab9/0xd20 [ 429.789567][ T31] ? rcu_is_watching+0x15/0xb0 [ 429.794379][ T31] folio_wait_writeback+0xb0/0x100 [ 429.799503][ T31] __filemap_fdatawait_range+0x147/0x230 [ 429.805196][ T31] ? __pfx___filemap_fdatawait_range+0x10/0x10 [ 429.811379][ T31] ? wbc_detach_inode+0x137/0x750 [ 429.816445][ T31] file_write_and_wait_range+0x275/0x330 [ 429.822113][ T31] ? __pfx_file_write_and_wait_range+0x10/0x10 [ 429.828405][ T31] v9fs_file_fsync+0xcf/0x1a0 [ 429.833118][ T31] ? __pfx_v9fs_file_fsync+0x10/0x10 [ 429.838474][ T31] ? __up_read+0x280/0x680 [ 429.842910][ T31] ? __pfx___up_read+0x10/0x10 [ 429.847752][ T31] ? netfs_file_write_iter+0x189/0x4a0 [ 429.853230][ T31] netfs_file_write_iter+0x3d8/0x4a0 [ 429.858559][ T31] vfs_write+0x54b/0xa90 [ 429.862804][ T31] ? __pfx_v9fs_file_write_iter+0x10/0x10 [ 429.868578][ T31] ? __pfx_vfs_write+0x10/0x10 [ 429.873349][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 429.878581][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 429.883786][ T31] ksys_write+0x145/0x250 [ 429.888166][ T31] ? __pfx_ksys_write+0x10/0x10 [ 429.893019][ T31] ? rcu_is_watching+0x15/0xb0 [ 429.897825][ T31] do_syscall_64+0xfa/0x3b0 [ 429.902335][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 429.907600][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.913692][ T31] ? clear_bhb_loop+0x60/0xb0 [ 429.918464][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.924440][ T31] RIP: 0033:0x7f9c6423eef9 [ 429.928852][ T31] RSP: 002b:00007ffe1e252f68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 429.937287][ T31] RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007f9c6423eef9 [ 429.945315][ T31] RDX: 0000000000007fec RSI: 0000200000000300 RDI: 0000000000000007 [ 429.953280][ T31] RBP: 0030656c69662f2e R08: 0000000000000006 R09: 0000000000000006 [ 429.961300][ T31] R10: 0000000000000006 R11: 0000000000000246 R12: 0000200000000180 [ 429.969336][ T31] R13: 00007f9c6428804e R14: 0000000000000001 R15: 0000000000000001 [ 429.977393][ T31] [ 429.980447][ T31] [ 429.980447][ T31] Showing all locks held in the system: [ 429.988230][ T31] 2 locks held by kworker/u8:0/12: [ 429.993361][ T31] #0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 430.005131][ T31] #1: ffffc90000117bc0 ((work_completion)(&rreq->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 430.016963][ T31] 1 lock held by khungtaskd/31: [ 430.021802][ T31] #0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 430.031737][ T31] 2 locks held by getty/5598: [ 430.036441][ T31] #0: ffff88814dc080a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.046236][ T31] #1: ffffc9000331e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 430.056486][ T31] 1 lock held by syz-executor108/5866: [ 430.061922][ T31] #0: ffff888034e36428 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x211/0xa90 [ 430.070846][ T31] [ 430.073171][ T31] ============================================= [ 430.073171][ T31] [ 430.081626][ T31] NMI backtrace for cpu 0 [ 430.081647][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 430.081667][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.081677][ T31] Call Trace: [ 430.081683][ T31] [ 430.081690][ T31] dump_stack_lvl+0x189/0x250 [ 430.081713][ T31] ? __wake_up_klogd+0xd9/0x110 [ 430.081739][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.081757][ T31] ? __pfx__printk+0x10/0x10 [ 430.081791][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 430.081819][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.081842][ T31] ? _printk+0xcf/0x120 [ 430.081869][ T31] ? __pfx__printk+0x10/0x10 [ 430.081893][ T31] ? debug_show_all_locks+0x2e/0x180 [ 430.081913][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.081943][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 430.081973][ T31] watchdog+0xfee/0x1030 [ 430.082002][ T31] ? watchdog+0x1de/0x1030 [ 430.082035][ T31] kthread+0x70e/0x8a0 [ 430.082063][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.082088][ T31] ? __pfx_kthread+0x10/0x10 [ 430.082115][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.082133][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.082152][ T31] ? __pfx_kthread+0x10/0x10 [ 430.082177][ T31] ret_from_fork+0x3fc/0x770 [ 430.082199][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.082223][ T31] ? __switch_to_asm+0x39/0x70 [ 430.082244][ T31] ? __switch_to_asm+0x33/0x70 [ 430.082273][ T31] ? __pfx_kthread+0x10/0x10 [ 430.082298][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.082332][ T31] [ 430.082339][ T31] Sending NMI from CPU 0 to CPUs 1: [ 430.242167][ C1] NMI backtrace for cpu 1 [ 430.242184][ C1] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 430.242203][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.242212][ C1] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 430.242236][ 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 [ 430.242247][ C1] RSP: 0018:ffffc90000197de0 EFLAGS: 000002c2 [ 430.242261][ C1] RAX: 0708b2c9cf06a000 RBX: ffffffff81976918 RCX: 0708b2c9cf06a000 [ 430.242272][ C1] RDX: 0000000000000001 RSI: ffffffff8d982fba RDI: ffffffff8be1ba40 [ 430.242281][ C1] RBP: ffffc90000197f20 R08: ffff8880b8732f5b R09: 1ffff110170e65eb [ 430.242292][ C1] R10: dffffc0000000000 R11: ffffed10170e65ec R12: ffffffff8fa0b3f0 [ 430.242304][ C1] R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003a57b40 [ 430.242314][ C1] FS: 0000000000000000(0000) GS:ffff888125d57000(0000) knlGS:0000000000000000 [ 430.242327][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.242339][ C1] CR2: 000056391fbc1660 CR3: 000000000df38000 CR4: 00000000003526f0 [ 430.242354][ C1] Call Trace: [ 430.242363][ C1] [ 430.242370][ C1] default_idle+0x13/0x20 [ 430.242390][ C1] default_idle_call+0x74/0xb0 [ 430.242410][ C1] do_idle+0x1e8/0x510 [ 430.242431][ C1] ? __pfx_do_idle+0x10/0x10 [ 430.242446][ C1] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 430.242471][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.242497][ C1] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 430.242521][ C1] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 430.242549][ C1] cpu_startup_entry+0x44/0x60 [ 430.242566][ C1] start_secondary+0x101/0x110 [ 430.242589][ C1] common_startup_64+0x13e/0x147 [ 430.242616][ C1] [ 430.243146][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.243165][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 430.243186][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.243198][ T31] Call Trace: [ 430.243207][ T31] [ 430.243221][ T31] dump_stack_lvl+0x99/0x250 [ 430.243252][ T31] ? __asan_memcpy+0x40/0x70 [ 430.243279][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.243301][ T31] ? __pfx__printk+0x10/0x10 [ 430.243336][ T31] panic+0x2db/0x790 [ 430.243361][ T31] ? __pfx_panic+0x10/0x10 [ 430.243381][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 430.243407][ T31] ? irq_work_queue+0xc3/0x140 [ 430.243442][ T31] watchdog+0x102d/0x1030 [ 430.243472][ T31] ? watchdog+0x1de/0x1030 [ 430.243506][ T31] kthread+0x70e/0x8a0 [ 430.243534][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.243559][ T31] ? __pfx_kthread+0x10/0x10 [ 430.243586][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.243603][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.243629][ T31] ? __pfx_kthread+0x10/0x10 [ 430.243654][ T31] ret_from_fork+0x3fc/0x770 [ 430.243676][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.243700][ T31] ? __switch_to_asm+0x39/0x70 [ 430.243721][ T31] ? __switch_to_asm+0x33/0x70 [ 430.243743][ T31] ? __pfx_kthread+0x10/0x10 [ 430.243768][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.243806][ T31] [ 430.564403][ T31] Kernel Offset: disabled [ 430.568711][ T31] Rebooting in 86400 seconds..