./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3614991769 <...> Warning: Permanently added '10.128.0.76' (ED25519) to the list of known hosts. execve("./syz-executor3614991769", ["./syz-executor3614991769"], 0x7fff5cf53890 /* 10 vars */) = 0 brk(NULL) = 0x555558f9a000 brk(0x555558f9ad00) = 0x555558f9ad00 arch_prctl(ARCH_SET_FS, 0x555558f9a380) = 0 set_tid_address(0x555558f9a650) = 5854 set_robust_list(0x555558f9a660, 24) = 0 rseq(0x555558f9aca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3614991769", 4096) = 28 getrandom("\xe9\x6d\xc1\xc8\x42\x67\xb2\xcd", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555558f9ad00 brk(0x555558fbbd00) = 0x555558fbbd00 brk(0x555558fbc000) = 0x555558fbc000 mprotect(0x7f1bac576000, 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 5855 attached [pid 5855] set_robust_list(0x555558f9a660, 24 [pid 5854] <... clone resumed>, child_tidptr=0x555558f9a650) = 5855 [pid 5855] <... set_robust_list resumed>) = 0 [pid 5855] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5855] setpgid(0, 0) = 0 [pid 5855] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5855] write(3, "1000", 4) = 4 [pid 5855] close(3) = 0 [pid 5855] write(1, "executing program\n", 18executing program ) = 18 [pid 5855] creat("./file0", 000) = 3 [pid 5855] pipe2([4, 5], 0) = 0 [pid 5855] 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 5855] dup(5) = 6 [pid 5855] 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 5855] 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 5855] mount(NULL, "./file0", "9p", MS_SYNCHRONOUS|MS_REC, "trans=fd,rfdno=0x0000000000000004,wfdno=0x0000000000000006,cache=mmap,k") = 0 [pid 5855] chmod("./file0", 000) = 0 [pid 5855] open("./file0", O_WRONLY) = 7 [pid 5855] 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 5854] kill(-5855, SIGKILL) = 0 [pid 5854] kill(5855, SIGKILL) = 0 [pid 5854] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5854] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5854] getdents64(3, 0x555558f9b6f0 /* 2 entries */, 32768) = 48 [pid 5854] getdents64(3, 0x555558f9b6f0 /* 0 entries */, 32768) = 0 [pid 5854] close(3) = 0 [ 286.468717][ T31] INFO: task syz-executor361:5855 blocked for more than 143 seconds. [ 286.477424][ T31] Not tainted 6.16.0-syzkaller #0 [ 286.483262][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.492825][ T31] task:syz-executor361 state:D stack:25048 pid:5855 tgid:5855 ppid:5854 task_flags:0x400140 flags:0x00004006 [ 286.505063][ T31] Call Trace: [ 286.508448][ T31] [ 286.511691][ T31] __schedule+0x16aa/0x4c90 [ 286.516985][ T31] ? schedule+0x165/0x360 [ 286.521910][ T31] ? __pfx___schedule+0x10/0x10 [ 286.526913][ T31] ? schedule+0x91/0x360 [ 286.531445][ T31] schedule+0x165/0x360 [ 286.536083][ T31] io_schedule+0x81/0xe0 [ 286.540457][ T31] folio_wait_bit_common+0x6b0/0xb90 [ 286.546090][ T31] ? __pfx_folio_wait_bit_common+0x10/0x10 [ 286.552113][ T31] ? __pfx_wake_page_function+0x10/0x10 [ 286.558207][ T31] ? __pfx_filemap_get_folios_tag+0x10/0x10 [ 286.564277][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.569513][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.574608][ T31] folio_wait_writeback+0xb0/0x100 [ 286.579854][ T31] __filemap_fdatawait_range+0x147/0x230 [ 286.585562][ T31] ? __pfx___filemap_fdatawait_range+0x10/0x10 [ 286.592383][ T31] ? wbc_detach_inode+0x137/0x750 [ 286.597672][ T31] file_write_and_wait_range+0x275/0x330 [ 286.603338][ T31] ? __pfx_file_write_and_wait_range+0x10/0x10 [ 286.610144][ T31] v9fs_file_fsync+0xcf/0x1a0 [ 286.615014][ T31] ? __pfx_v9fs_file_fsync+0x10/0x10 [ 286.620453][ T31] ? __up_read+0x280/0x680 [ 286.624987][ T31] ? __pfx___up_read+0x10/0x10 [ 286.629873][ T31] ? netfs_file_write_iter+0x189/0x4a0 [ 286.635444][ T31] netfs_file_write_iter+0x3d8/0x4a0 [ 286.641130][ T31] vfs_write+0x54b/0xa90 [ 286.645869][ T31] ? __pfx_v9fs_file_write_iter+0x10/0x10 [ 286.651707][ T31] ? __pfx_vfs_write+0x10/0x10 [ 286.656540][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.661820][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.667061][ T31] ksys_write+0x145/0x250 [ 286.671513][ T31] ? __pfx_ksys_write+0x10/0x10 [ 286.676395][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.681404][ T31] do_syscall_64+0xfa/0x3b0 [ 286.685958][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.692241][ T31] ? asm_sysvec_reschedule_ipi+0x1a/0x20 [ 286.698021][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.702783][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.708894][ T31] RIP: 0033:0x7f1bac502ef9 [ 286.713366][ T31] RSP: 002b:00007ffebfd25548 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 286.722675][ T31] RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007f1bac502ef9 [ 286.731050][ T31] RDX: 0000000000007fec RSI: 0000200000000300 RDI: 0000000000000007 [ 286.739952][ T31] RBP: 0030656c69662f2e R08: 0000000000000006 R09: 0000000000000006 [ 286.748180][ T31] R10: 0000000000000006 R11: 0000000000000246 R12: 0000200000000180 [ 286.756273][ T31] R13: 00007f1bac54c04e R14: 0000000000000001 R15: 0000000000000001 [ 286.764538][ T31] [ 286.767737][ T31] [ 286.767737][ T31] Showing all locks held in the system: [ 286.775515][ T31] 6 locks held by kworker/u8:1/13: [ 286.780921][ T31] #0: ffff8880b8639e18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 [ 286.792362][ T31] #1: ffff8880b8623f08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x318/0x6d0 [ 286.804366][ T31] #2: ffffffff99ce7760 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_deactivate+0x9a/0x250 [ 286.815286][ T31] #3: ffffffff99d06b70 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0xbb/0x420 [ 286.826127][ T31] #4: ffffffff8dfea988 (text_mutex){+.+.}-{4:4}, at: arch_jump_label_transform_apply+0x17/0x30 [ 286.838300][ T31] #5: ffff8880b8625958 (&base->lock){-.-.}-{2:2}, at: __run_timer_base+0x622/0x860 [ 286.848347][ T31] 1 lock held by khungtaskd/31: [ 286.853345][ T31] #0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.863472][ T31] 2 locks held by kworker/u8:11/3000: [ 286.868936][ T31] #0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 286.880937][ T31] #1: ffffc9000bb2fbc0 ((work_completion)(&rreq->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 286.893290][ T31] 2 locks held by getty/5601: [ 286.898199][ T31] #0: ffff88814cd170a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.908359][ T31] #1: ffffc9000331e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.918764][ T31] 1 lock held by syz-executor361/5855: [ 286.924791][ T31] #0: ffff8880777c8428 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x211/0xa90 [ 286.934802][ T31] [ 286.937239][ T31] ============================================= [ 286.937239][ T31] [ 286.946216][ T31] NMI backtrace for cpu 1 [ 286.946244][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 286.946262][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 286.946271][ T31] Call Trace: [ 286.946280][ T31] [ 286.946288][ T31] dump_stack_lvl+0x189/0x250 [ 286.946308][ T31] ? __wake_up_klogd+0xd9/0x110 [ 286.946331][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.946348][ T31] ? __pfx__printk+0x10/0x10 [ 286.946377][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 286.946403][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 286.946424][ T31] ? _printk+0xcf/0x120 [ 286.946447][ T31] ? __pfx__printk+0x10/0x10 [ 286.946467][ T31] ? debug_show_all_locks+0x2e/0x180 [ 286.946484][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.946510][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 286.946535][ T31] watchdog+0xfee/0x1030 [ 286.946560][ T31] ? watchdog+0x1de/0x1030 [ 286.946588][ T31] kthread+0x70e/0x8a0 [ 286.946611][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.946633][ T31] ? __pfx_kthread+0x10/0x10 [ 286.946654][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.946668][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.946683][ T31] ? __pfx_kthread+0x10/0x10 [ 286.946704][ T31] ret_from_fork+0x3fc/0x770 [ 286.946721][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.946740][ T31] ? __switch_to_asm+0x39/0x70 [ 286.946758][ T31] ? __switch_to_asm+0x33/0x70 [ 286.946776][ T31] ? __pfx_kthread+0x10/0x10 [ 286.946797][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.946828][ T31] [ 286.946833][ T31] Sending NMI from CPU 1 to CPUs 0: [ 287.133913][ C0] NMI backtrace for cpu 0 [ 287.133932][ C0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 287.133952][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.133964][ C0] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 287.133988][ C0] 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 [ 287.134003][ C0] RSP: 0018:ffffffff8de07d80 EFLAGS: 000002c2 [ 287.134020][ C0] RAX: 1ccd6bf9fc966800 RBX: ffffffff81976918 RCX: 1ccd6bf9fc966800 [ 287.134034][ C0] RDX: 0000000000000001 RSI: ffffffff8d982fba RDI: ffffffff8be1ba40 [ 287.134047][ C0] RBP: ffffffff8de07ea8 R08: ffff8880b8632f5b R09: 1ffff110170c65eb [ 287.134060][ C0] R10: dffffc0000000000 R11: ffffed10170c65ec R12: ffffffff8fa0b3f0 [ 287.134074][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1bd2a50 [ 287.134086][ C0] FS: 0000000000000000(0000) GS:ffff888125c57000(0000) knlGS:0000000000000000 [ 287.134100][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.134112][ C0] CR2: 0000557d4a310660 CR3: 000000000df38000 CR4: 00000000003526f0 [ 287.134129][ C0] Call Trace: [ 287.134162][ C0] [ 287.134169][ C0] default_idle+0x13/0x20 [ 287.134192][ C0] default_idle_call+0x74/0xb0 [ 287.134215][ C0] do_idle+0x1e8/0x510 [ 287.134239][ C0] ? __pfx_do_idle+0x10/0x10 [ 287.134258][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.134276][ C0] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 287.134305][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 287.134337][ C0] cpu_startup_entry+0x44/0x60 [ 287.134356][ C0] rest_init+0x2de/0x300 [ 287.134379][ C0] ? __pfx_x86_late_time_init+0x10/0x10 [ 287.134481][ C0] start_kernel+0x47d/0x500 [ 287.134619][ C0] x86_64_start_reservations+0x24/0x30 [ 287.134646][ C0] x86_64_start_kernel+0x143/0x1c0 [ 287.134672][ C0] common_startup_64+0x13e/0x147 [ 287.134704][ C0] [ 287.134985][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.135014][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full) [ 287.135043][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.135058][ T31] Call Trace: [ 287.135070][ T31] [ 287.135081][ T31] dump_stack_lvl+0x99/0x250 [ 287.135112][ T31] ? __asan_memcpy+0x40/0x70 [ 287.135149][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.135177][ T31] ? __pfx__printk+0x10/0x10 [ 287.135224][ T31] panic+0x2db/0x790 [ 287.135257][ T31] ? __pfx_panic+0x10/0x10 [ 287.135282][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 287.135315][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.135354][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 287.135472][ T31] watchdog+0x102d/0x1030 [ 287.135513][ T31] ? watchdog+0x1de/0x1030 [ 287.135560][ T31] kthread+0x70e/0x8a0 [ 287.135599][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.135634][ T31] ? __pfx_kthread+0x10/0x10 [ 287.135670][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.135693][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.135716][ T31] ? __pfx_kthread+0x10/0x10 [ 287.135752][ T31] ret_from_fork+0x3fc/0x770 [ 287.135781][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.135812][ T31] ? __switch_to_asm+0x39/0x70 [ 287.135843][ T31] ? __switch_to_asm+0x33/0x70 [ 287.135872][ T31] ? __pfx_kthread+0x10/0x10 [ 287.135905][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.135957][ T31] [ 287.490742][ T31] Kernel Offset: disabled [ 287.495259][ T31] Rebooting in 86400 seconds..