[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.45' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 717.654166] INFO: task syz-executor358:8106 blocked for more than 140 seconds. [ 717.661633] Not tainted 4.19.211-syzkaller #0 [ 717.667880] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.675940] syz-executor358 D27920 8106 8104 0x00000004 [ 717.681568] Call Trace: [ 717.684204] __schedule+0x887/0x2040 [ 717.687964] ? io_schedule_timeout+0x140/0x140 [ 717.692551] ? _raw_spin_unlock+0x29/0x40 [ 717.696737] schedule+0x8d/0x1b0 [ 717.700125] fuse_wait_on_page_writeback.isra.0+0x11b/0x170 [ 717.705871] ? fuse_do_ioctl+0x1850/0x1850 [ 717.710103] ? wait_woken+0x250/0x250 [ 717.713886] ? fuse_writepage_locked+0xb63/0x1010 [ 717.718767] ? fuse_writepage_locked+0x1010/0x1010 [ 717.723693] fuse_launder_page+0xb6/0xe0 [ 717.727789] invalidate_inode_pages2_range+0x795/0x1110 [ 717.733158] ? clear_shadow_entry+0x170/0x170 [ 717.737688] ? fuse_file_alloc+0x1d9/0x270 [ 717.741927] ? do_raw_spin_unlock+0x171/0x230 [ 717.746459] ? _raw_spin_unlock+0x29/0x40 [ 717.750610] ? fuse_do_open+0x1c4/0x500 [ 717.754623] fuse_finish_open+0x2e2/0x590 [ 717.758771] fuse_open_common+0x254/0x2c0 [ 717.762903] do_dentry_open+0x4aa/0x1160 [ 717.766999] ? fuse_open_common+0x2c0/0x2c0 [ 717.771322] ? inode_permission.part.0+0x10c/0x450 [ 717.776285] ? chown_common+0x550/0x550 [ 717.780258] ? inode_permission+0x3d/0x140 [ 717.784544] path_openat+0x793/0x2df0 [ 717.788343] ? path_lookupat+0x8d0/0x8d0 [ 717.792387] ? mark_held_locks+0xf0/0xf0 [ 717.796490] do_filp_open+0x18c/0x3f0 [ 717.800290] ? may_open_dev+0xf0/0xf0 [ 717.804142] ? lock_downgrade+0x720/0x720 [ 717.808296] ? lock_acquire+0x170/0x3c0 [ 717.812252] ? __alloc_fd+0x34/0x570 [ 717.816007] ? do_raw_spin_unlock+0x171/0x230 [ 717.820607] ? _raw_spin_unlock+0x29/0x40 [ 717.824799] ? __alloc_fd+0x28d/0x570 [ 717.828596] do_sys_open+0x3b3/0x520 [ 717.832295] ? filp_open+0x70/0x70 [ 717.835875] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 717.841245] ? trace_hardirqs_off_caller+0x6e/0x210 [ 717.846304] ? do_syscall_64+0x21/0x620 [ 717.850278] do_syscall_64+0xf9/0x620 [ 717.854123] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.859393] RIP: 0033:0x7f4bdb5654c9 [ 717.863089] Code: Bad RIP value. [ 717.866489] RSP: 002b:00007f4bdb5162f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 717.874253] RAX: ffffffffffffffda RBX: 00007f4bdb5f64c0 RCX: 00007f4bdb5654c9 [ 717.881511] RDX: 0000000000000000 RSI: 0000000000000700 RDI: 0000000020000100 [ 717.888830] RBP: 00007f4bdb5c3164 R08: 0000000000000000 R09: 0000000000000000 [ 717.896163] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 717.903429] R13: 00007f4bdb5bf158 R14: 00007f4bdb5c1160 R15: 00007f4bdb5f64c8 [ 717.910796] [ 717.910796] Showing all locks held in the system: [ 717.917240] 1 lock held by khungtaskd/1571: [ 717.921655] #0: 00000000f2b79ad6 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 717.930316] 1 lock held by in:imklog/7798: [ 717.934589] #0: 00000000895945ec (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 [ 717.942780] 2 locks held by syz-executor358/8106: [ 717.947656] #0: 00000000647c8b42 (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0 [ 717.955714] #1: 00000000ef2208cf (&sb->s_type->i_mutex_key#17){+.+.}, at: fuse_open_common+0x1bc/0x2c0 [ 717.965297] [ 717.966915] ============================================= [ 717.966915] [ 717.973909] NMI backtrace for cpu 1 [ 717.977632] CPU: 1 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 717.985068] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 717.994401] Call Trace: [ 717.996971] dump_stack+0x1fc/0x2ef [ 718.000581] nmi_cpu_backtrace.cold+0x63/0xa2 [ 718.005057] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.009538] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 718.014805] watchdog+0x991/0xe60 [ 718.018240] ? reset_hung_task_detector+0x30/0x30 [ 718.023080] kthread+0x33f/0x460 [ 718.026428] ? kthread_park+0x180/0x180 [ 718.030412] ret_from_fork+0x24/0x30 [ 718.034179] Sending NMI from CPU 1 to CPUs 0: [ 718.039226] NMI backtrace for cpu 0 [ 718.039232] CPU: 0 PID: 4693 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 [ 718.039238] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.039242] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 [ 718.039253] Code: ff 48 89 df e8 11 dd 35 00 e9 ab fe ff ff 4c 89 ef e8 04 dd 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <48> 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 [ 718.039257] RSP: 0018:ffff8880a0f9fa00 EFLAGS: 00000082 [ 718.039264] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000001 [ 718.039269] RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffffea0002bbed00 [ 718.039274] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 718.039279] R10: 0000000000000005 R11: 0000000000000009 R12: ffffea0002bbed00 [ 718.039284] R13: 0000000000000015 R14: ffffea0002bbed00 R15: 00000000000aefb4 [ 718.039289] FS: 00007f1b309698c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 718.039294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.039299] CR2: 00007f1b2dd3b028 CR3: 00000000a1b83000 CR4: 00000000003406f0 [ 718.039304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.039308] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.039311] Call Trace: [ 718.039315] kernel_poison_pages+0x1a/0x2a0 [ 718.039318] __free_pages_ok+0x242/0xd30 [ 718.039322] slabs_destroy+0x90/0xd0 [ 718.039325] ___cache_free+0x295/0x3a0 [ 718.039329] qlist_free_all+0x79/0x140 [ 718.039332] quarantine_reduce+0x1a9/0x230 [ 718.039336] kasan_kmalloc+0xa2/0x160 [ 718.039339] ? debug_object_activate+0x12f/0x450 [ 718.039343] ? __put_seccomp_filter+0xa0/0xa0 [ 718.039346] ? __lock_acquire+0x6de/0x3ff0 [ 718.039350] ? mark_held_locks+0xf0/0xf0 [ 718.039354] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 718.039357] ? __seccomp_filter+0xe4/0xca0 [ 718.039361] ? seccomp_send_sigsys+0x1c0/0x1c0 [ 718.039365] ? mark_held_locks+0xf0/0xf0 [ 718.039368] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 718.039372] ? fs_reclaim_release+0xd0/0x110 [ 718.039375] ? lock_acquire+0x170/0x3c0 [ 718.039379] ? kmem_cache_alloc+0x2b1/0x370 [ 718.039382] kmem_cache_alloc+0x110/0x370 [ 718.039386] prepare_creds+0x39/0x510 [ 718.039389] do_faccessat+0x94/0x7a0 [ 718.039393] ? __ia32_sys_fallocate+0x140/0x140 [ 718.039397] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 718.039401] ? trace_hardirqs_off_caller+0x6e/0x210 [ 718.039404] ? do_syscall_64+0x21/0x620 [ 718.039407] do_syscall_64+0xf9/0x620 [ 718.039411] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.039414] RIP: 0033:0x7f1b2fc249c7 [ 718.039425] Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 [ 718.039429] RSP: 002b:00007ffd3ce05588 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 718.039437] RAX: ffffffffffffffda RBX: 00007ffd3ce085b0 RCX: 00007f1b2fc249c7 [ 718.039442] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000561b3f8ed9a3 [ 718.039447] RBP: 00007ffd3ce056d0 R08: 0000561b3f8e33e5 R09: 0000000000000018 [ 718.039452] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 718.039457] R13: 0000000000000000 R14: 0000561b414a08a0 R15: 00007ffd3ce05bc0 [ 718.040081] Kernel panic - not syncing: hung_task: blocked tasks [ 718.356893] CPU: 1 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.364315] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.373644] Call Trace: [ 718.376217] dump_stack+0x1fc/0x2ef [ 718.379919] panic+0x26a/0x50e [ 718.383092] ? __warn_printk+0xf3/0xf3 [ 718.386965] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.391461] ? ___preempt_schedule+0x16/0x18 [ 718.395850] ? watchdog+0x991/0xe60 [ 718.399454] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.404886] watchdog+0x9a2/0xe60 [ 718.408324] ? reset_hung_task_detector+0x30/0x30 [ 718.413150] kthread+0x33f/0x460 [ 718.416619] ? kthread_park+0x180/0x180 [ 718.420579] ret_from_fork+0x24/0x30 [ 718.424602] Kernel Offset: disabled [ 718.428217] Rebooting in 86400 seconds..