./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor411120132 <...> Warning: Permanently added '10.128.0.160' (ED25519) to the list of known hosts. execve("./syz-executor411120132", ["./syz-executor411120132"], 0x7ffc15048cc0 /* 10 vars */) = 0 brk(NULL) = 0x555570d4b000 brk(0x555570d4bd00) = 0x555570d4bd00 arch_prctl(ARCH_SET_FS, 0x555570d4b380) = 0 set_tid_address(0x555570d4b650) = 5859 set_robust_list(0x555570d4b660, 24) = 0 rseq(0x555570d4bca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor411120132", 4096) = 27 getrandom("\xd6\x82\x20\xe5\x1f\x12\x51\x85", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555570d4bd00 brk(0x555570d6cd00) = 0x555570d6cd00 brk(0x555570d6d000) = 0x555570d6d000 mprotect(0x7fc153958000, 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 5860 attached , child_tidptr=0x555570d4b650) = 5860 [pid 5860] set_robust_list(0x555570d4b660, 24) = 0 [pid 5860] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5860] setpgid(0, 0) = 0 [pid 5860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5860] write(3, "1000", 4) = 4 [pid 5860] close(3) = 0 [pid 5860] write(1, "executing program\n", 18executing program ) = 18 [pid 5860] creat("./file0", 000) = 3 [pid 5860] pipe2([4, 5], 0) = 0 [pid 5860] 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 5860] dup(5) = 6 [pid 5860] 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 5860] 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 5860] mount(NULL, "./file0", "9p", MS_SYNCHRONOUS|MS_REC, "trans=fd,rfdno=0x0000000000000004,wfdno=0x0000000000000006,cache=mmap,k") = 0 [pid 5860] chmod("./file0", 000) = 0 [pid 5860] open("./file0", O_WRONLY) = 7 [pid 5860] 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 5859] kill(-5860, SIGKILL) = 0 [pid 5859] kill(5860, SIGKILL) = 0 [pid 5859] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5859] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5859] getdents64(3, 0x555570d4c6f0 /* 2 entries */, 32768) = 48 [pid 5859] getdents64(3, 0x555570d4c6f0 /* 0 entries */, 32768) = 0 [pid 5859] close(3) = 0 [ 429.809546][ T31] INFO: task syz-executor411:5860 blocked for more than 143 seconds. [ 429.817794][ T31] Not tainted 6.16.0-syzkaller #0 [ 429.823540][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.832334][ T31] task:syz-executor411 state:D stack:25048 pid:5860 tgid:5860 ppid:5859 task_flags:0x400140 flags:0x00004006 [ 429.844462][ T31] Call Trace: [ 429.847807][ T31] [ 429.850854][ T31] __schedule+0x16aa/0x4c90 [ 429.855438][ T31] ? schedule+0x165/0x360 [ 429.859864][ T31] ? __pfx___schedule+0x10/0x10 [ 429.864761][ T31] ? schedule+0x91/0x360 [ 429.869020][ T31] schedule+0x165/0x360 [ 429.873331][ T31] io_schedule+0x81/0xe0 [ 429.877613][ T31] folio_wait_bit_common+0x6b0/0xb90 [ 429.883012][ T31] ? __pfx_folio_wait_bit_common+0x10/0x10 [ 429.888886][ T31] ? __pfx_wake_page_function+0x10/0x10 [ 429.894629][ T31] ? __pfx_filemap_get_folios_tag+0x10/0x10 [ 429.900664][ T31] ? __lock_acquire+0xab9/0xd20 [ 429.905545][ T31] ? rcu_is_watching+0x15/0xb0 [ 429.910404][ T31] folio_wait_writeback+0xb0/0x100 [ 429.915562][ T31] __filemap_fdatawait_range+0x147/0x230 [ 429.921282][ T31] ? __pfx___filemap_fdatawait_range+0x10/0x10 [ 429.927524][ T31] ? wbc_detach_inode+0x137/0x750 [ 429.932670][ T31] file_write_and_wait_range+0x275/0x330 [ 429.938346][ T31] ? __pfx_file_write_and_wait_range+0x10/0x10 [ 429.944733][ T31] v9fs_file_fsync+0xcf/0x1a0 [ 429.949591][ T31] ? __pfx_v9fs_file_fsync+0x10/0x10 [ 429.954898][ T31] ? __up_read+0x280/0x680 [ 429.959397][ T31] ? __pfx___up_read+0x10/0x10 [ 429.964210][ T31] ? netfs_file_write_iter+0x189/0x4a0 [ 429.969819][ T31] netfs_file_write_iter+0x3d8/0x4a0 [ 429.975175][ T31] vfs_write+0x54b/0xa90 [ 429.979498][ T31] ? __pfx_v9fs_file_write_iter+0x10/0x10 [ 429.985260][ T31] ? __pfx_vfs_write+0x10/0x10 [ 429.990143][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 429.995417][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 430.000738][ T31] ksys_write+0x145/0x250 [ 430.005113][ T31] ? __pfx_ksys_write+0x10/0x10 [ 430.010061][ T31] ? rcu_is_watching+0x15/0xb0 [ 430.014893][ T31] do_syscall_64+0xfa/0x3b0 [ 430.019501][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.024737][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.031250][ T31] ? clear_bhb_loop+0x60/0xb0 [ 430.035967][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.041934][ T31] RIP: 0033:0x7fc1538e4ef9 [ 430.046392][ T31] RSP: 002b:00007fff03204398 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 430.054923][ T31] RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007fc1538e4ef9 [ 430.062969][ T31] RDX: 0000000000007fec RSI: 0000200000000300 RDI: 0000000000000007 [ 430.071032][ T31] RBP: 0030656c69662f2e R08: 0000000000000006 R09: 0000000000000006 [ 430.079048][ T31] R10: 0000000000000006 R11: 0000000000000246 R12: 0000200000000180 [ 430.087122][ T31] R13: 00007fc15392e04e R14: 0000000000000001 R15: 0000000000000001 [ 430.095242][ T31] [ 430.098311][ T31] [ 430.098311][ T31] Showing all locks held in the system: [ 430.106101][ T31] 1 lock held by khungtaskd/31: [ 430.111057][ T31] #0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 430.121069][ T31] 2 locks held by kworker/u8:7/3520: [ 430.126458][ T31] #0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 430.138217][ T31] #1: ffffc9000c3b7bc0 ((work_completion)(&rreq->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 430.150108][ T31] 2 locks held by getty/5596: [ 430.154797][ T31] #0: ffff8880352ea0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.164647][ T31] #1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 430.174861][ T31] 1 lock held by syz-executor411/5860: [ 430.180379][ T31] #0: ffff888029778428 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x211/0xa90 [ 430.189379][ T31] [ 430.191713][ T31] ============================================= [ 430.191713][ T31] [ 430.200258][ T31] NMI backtrace for cpu 0 [ 430.200284][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 430.200308][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.200321][ T31] Call Trace: [ 430.200334][ T31] [ 430.200344][ T31] dump_stack_lvl+0x189/0x250 [ 430.200373][ T31] ? __wake_up_klogd+0xd9/0x110 [ 430.200401][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.200422][ T31] ? __pfx__printk+0x10/0x10 [ 430.200461][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 430.200495][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.200522][ T31] ? _printk+0xcf/0x120 [ 430.200551][ T31] ? __pfx__printk+0x10/0x10 [ 430.200579][ T31] ? debug_show_all_locks+0x2e/0x180 [ 430.200602][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.200638][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 430.200674][ T31] watchdog+0xfee/0x1030 [ 430.200709][ T31] ? watchdog+0x1de/0x1030 [ 430.200757][ T31] kthread+0x70e/0x8a0 [ 430.200790][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.200821][ T31] ? __pfx_kthread+0x10/0x10 [ 430.200851][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.200872][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.200892][ T31] ? __pfx_kthread+0x10/0x10 [ 430.200922][ T31] ret_from_fork+0x3fc/0x770 [ 430.200947][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.200974][ T31] ? __switch_to_asm+0x39/0x70 [ 430.200999][ T31] ? __switch_to_asm+0x33/0x70 [ 430.201025][ T31] ? __pfx_kthread+0x10/0x10 [ 430.201055][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.201099][ T31] [ 430.201108][ T31] Sending NMI from CPU 0 to CPUs 1: [ 430.362218][ C1] NMI backtrace for cpu 1 [ 430.362236][ C1] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 430.362256][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.362267][ C1] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 430.362291][ 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 [ 430.362307][ C1] RSP: 0018:ffffc90000197de0 EFLAGS: 000002c2 [ 430.362323][ C1] RAX: 14b258f31ea96300 RBX: ffffffff81976918 RCX: 14b258f31ea96300 [ 430.362337][ C1] RDX: 0000000000000001 RSI: ffffffff8d982fba RDI: ffffffff8be1ba40 [ 430.362350][ C1] RBP: ffffc90000197f20 R08: ffff8880b8732f5b R09: 1ffff110170e65eb [ 430.362363][ C1] R10: dffffc0000000000 R11: ffffed10170e65ec R12: ffffffff8fa0b3f0 [ 430.362376][ C1] R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003a52b40 [ 430.362388][ C1] FS: 0000000000000000(0000) GS:ffff888125d57000(0000) knlGS:0000000000000000 [ 430.362402][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.362415][ C1] CR2: 00005561fd56a660 CR3: 000000000df38000 CR4: 00000000003526f0 [ 430.362431][ C1] Call Trace: [ 430.362441][ C1] [ 430.362448][ C1] default_idle+0x13/0x20 [ 430.362470][ C1] default_idle_call+0x74/0xb0 [ 430.362493][ C1] do_idle+0x1e8/0x510 [ 430.362517][ C1] ? __pfx_do_idle+0x10/0x10 [ 430.362535][ C1] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 430.362564][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.362583][ C1] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 430.362611][ C1] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 430.362645][ C1] cpu_startup_entry+0x44/0x60 [ 430.362665][ C1] start_secondary+0x101/0x110 [ 430.362691][ C1] common_startup_64+0x13e/0x147 [ 430.362723][ C1] [ 430.363211][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.363235][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 430.363265][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.363279][ T31] Call Trace: [ 430.363290][ T31] [ 430.363302][ T31] dump_stack_lvl+0x99/0x250 [ 430.363333][ T31] ? __asan_memcpy+0x40/0x70 [ 430.363369][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.363398][ T31] ? __pfx__printk+0x10/0x10 [ 430.363444][ T31] panic+0x2db/0x790 [ 430.363477][ T31] ? __pfx_panic+0x10/0x10 [ 430.363503][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 430.363538][ T31] ? irq_work_queue+0xc3/0x140 [ 430.363586][ T31] watchdog+0x102d/0x1030 [ 430.363625][ T31] ? watchdog+0x1de/0x1030 [ 430.363670][ T31] kthread+0x70e/0x8a0 [ 430.363709][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.363751][ T31] ? __pfx_kthread+0x10/0x10 [ 430.363786][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.363810][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.363835][ T31] ? __pfx_kthread+0x10/0x10 [ 430.363867][ T31] ret_from_fork+0x3fc/0x770 [ 430.363895][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.363928][ T31] ? __switch_to_asm+0x39/0x70 [ 430.363956][ T31] ? __switch_to_asm+0x33/0x70 [ 430.363985][ T31] ? __pfx_kthread+0x10/0x10 [ 430.364018][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.364069][ T31] [ 430.686181][ T31] Kernel Offset: disabled [ 430.690518][ T31] Rebooting in 86400 seconds..