[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.69' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 717.624724] INFO: task syz-executor179:8138 blocked for more than 140 seconds. [ 717.632165] Not tainted 4.19.211-syzkaller #0 [ 717.637398] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.645434] syz-executor179 D27400 8138 8136 0x00000004 [ 717.651053] Call Trace: [ 717.653630] __schedule+0x887/0x2040 [ 717.657422] ? io_schedule_timeout+0x140/0x140 [ 717.662007] ? _raw_spin_unlock+0x29/0x40 [ 717.666209] schedule+0x8d/0x1b0 [ 717.669568] fuse_wait_on_page_writeback.isra.0+0x11b/0x170 [ 717.675322] ? fuse_do_ioctl+0x1850/0x1850 [ 717.679552] ? wait_woken+0x250/0x250 [ 717.683333] ? fuse_writepage_locked+0xb63/0x1010 [ 717.688232] ? fuse_writepage_locked+0x1010/0x1010 [ 717.693152] fuse_launder_page+0xb6/0xe0 [ 717.697258] invalidate_inode_pages2_range+0x795/0x1110 [ 717.702626] ? clear_shadow_entry+0x170/0x170 [ 717.707178] ? fuse_file_alloc+0x1d9/0x270 [ 717.711408] ? do_raw_spin_unlock+0x171/0x230 [ 717.715941] ? _raw_spin_unlock+0x29/0x40 [ 717.720087] ? fuse_do_open+0x1c4/0x500 [ 717.724045] fuse_finish_open+0x2e2/0x590 [ 717.728247] fuse_open_common+0x254/0x2c0 [ 717.732396] do_dentry_open+0x4aa/0x1160 [ 717.736501] ? fuse_open_common+0x2c0/0x2c0 [ 717.740819] ? inode_permission.part.0+0x10c/0x450 [ 717.745805] ? chown_common+0x550/0x550 [ 717.749771] ? inode_permission+0x3d/0x140 [ 717.753989] path_openat+0x793/0x2df0 [ 717.757852] ? path_lookupat+0x8d0/0x8d0 [ 717.761908] ? mark_held_locks+0xf0/0xf0 [ 717.766032] do_filp_open+0x18c/0x3f0 [ 717.769824] ? may_open_dev+0xf0/0xf0 [ 717.773637] ? lock_downgrade+0x720/0x720 [ 717.777838] ? lock_acquire+0x170/0x3c0 [ 717.781805] ? __alloc_fd+0x34/0x570 [ 717.785575] ? do_raw_spin_unlock+0x171/0x230 [ 717.790059] ? _raw_spin_unlock+0x29/0x40 [ 717.794187] ? __alloc_fd+0x28d/0x570 [ 717.798037] do_sys_open+0x3b3/0x520 [ 717.801746] ? filp_open+0x70/0x70 [ 717.805346] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 717.810703] ? trace_hardirqs_off_caller+0x6e/0x210 [ 717.815760] ? do_syscall_64+0x21/0x620 [ 717.819948] do_syscall_64+0xf9/0x620 [ 717.823747] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.829008] RIP: 0033:0x7f42737624d9 [ 717.832721] Code: Bad RIP value. [ 717.836127] RSP: 002b:00007f42737132f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 717.843837] RAX: ffffffffffffffda RBX: 00007f42737f54c0 RCX: 00007f42737624d9 [ 717.851159] RDX: 00007f42737624d9 RSI: 0000000000000000 RDI: 00000000200001c0 [ 717.858482] RBP: 00007f42737c216c R08: 0000000000000000 R09: 0000000000000000 [ 717.865804] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 717.873066] R13: 00007f42737be160 R14: 00007f42737c0168 R15: 00007f42737f54c8 [ 717.880402] [ 717.880402] Showing all locks held in the system: [ 717.886790] 1 lock held by khungtaskd/1570: [ 717.891088] #0: 00000000c631e396 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 717.899747] 2 locks held by syz-executor179/8138: [ 717.904641] #0: 00000000839f7b50 (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0 [ 717.912609] #1: 0000000051b3d2aa (&sb->s_type->i_mutex_key#17){+.+.}, at: fuse_open_common+0x1bc/0x2c0 [ 717.922196] [ 717.923816] ============================================= [ 717.923816] [ 717.930885] NMI backtrace for cpu 1 [ 717.934499] CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 717.941923] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 717.951251] Call Trace: [ 717.953820] dump_stack+0x1fc/0x2ef [ 717.957429] nmi_cpu_backtrace.cold+0x63/0xa2 [ 717.961903] ? lapic_can_unplug_cpu+0x80/0x80 [ 717.966378] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 717.971637] watchdog+0x991/0xe60 [ 717.975072] ? reset_hung_task_detector+0x30/0x30 [ 717.979894] kthread+0x33f/0x460 [ 717.983239] ? kthread_park+0x180/0x180 [ 717.987194] ret_from_fork+0x24/0x30 [ 717.990995] Sending NMI from CPU 1 to CPUs 0: [ 717.995981] NMI backtrace for cpu 0 [ 717.995987] CPU: 0 PID: 10 Comm: rcu_preempt Not tainted 4.19.211-syzkaller #0 [ 717.995993] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 717.995996] RIP: 0010:mark_held_locks+0x1d/0xf0 [ 717.996007] Code: f8 ff ff 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 49 89 fd 48 81 c7 80 08 00 00 48 89 fa <41> 54 48 c1 ea 03 55 53 48 83 ec 08 0f b6 04 02 84 c0 74 08 3c 03 [ 717.996011] RSP: 0018:ffff8880b5a67b50 EFLAGS: 00000086 [ 717.996019] RAX: dffffc0000000000 RBX: ffff8880b5a4e280 RCX: 0000000000000000 [ 717.996023] RDX: ffff8880b5a4eb00 RSI: 0000000000000000 RDI: ffff8880b5a4eb00 [ 717.996028] RBP: ffffffff881950e9 R08: 0000000000000000 R09: 0000000000000000 [ 717.996034] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 717.996039] R13: ffff8880b5a4e280 R14: ffff8880ba022b40 R15: 00000000ffffffff [ 717.996044] FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 717.996048] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 717.996053] CR2: 00007ff70d51f028 CR3: 00000000a1294000 CR4: 00000000003406f0 [ 717.996058] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 717.996063] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 717.996066] Call Trace: [ 717.996070] lockdep_hardirqs_on+0x288/0x5c0 [ 717.996074] _raw_spin_unlock_irqrestore+0x79/0xe0 [ 717.996077] try_to_del_timer_sync+0xbf/0x110 [ 717.996081] ? detach_if_pending+0x460/0x460 [ 717.996084] ? del_timer_sync+0x75/0x270 [ 717.996088] ? del_timer_sync+0x1cc/0x270 [ 717.996091] del_timer_sync+0x1a4/0x270 [ 717.996095] schedule_timeout+0x4d7/0xfe0 [ 717.996098] ? prepare_to_swait_event+0x5b/0x540 [ 717.996102] ? usleep_range+0x170/0x170 [ 717.996106] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 717.996110] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.996114] ? collect_expired_timers+0x2a0/0x2a0 [ 717.996117] ? swake_up_all+0x340/0x340 [ 717.996120] rcu_gp_kthread+0xdad/0x21c0 [ 717.996124] ? lock_acquire+0x170/0x3c0 [ 717.996127] ? __rcu_read_unlock+0x160/0x160 [ 717.996132] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 717.996135] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.996139] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 717.996143] ? __kthread_parkme+0x133/0x1e0 [ 717.996147] ? __rcu_read_unlock+0x160/0x160 [ 717.996150] kthread+0x33f/0x460 [ 717.996153] ? kthread_park+0x180/0x180 [ 717.996156] ret_from_fork+0x24/0x30 [ 717.996814] Kernel panic - not syncing: hung_task: blocked tasks [ 718.233957] CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.241379] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 718.250707] Call Trace: [ 718.253280] dump_stack+0x1fc/0x2ef [ 718.256889] panic+0x26a/0x50e [ 718.260058] ? __warn_printk+0xf3/0xf3 [ 718.263925] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.268397] ? ___preempt_schedule+0x16/0x18 [ 718.272784] ? watchdog+0x991/0xe60 [ 718.276389] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.281819] watchdog+0x9a2/0xe60 [ 718.285250] ? reset_hung_task_detector+0x30/0x30 [ 718.290072] kthread+0x33f/0x460 [ 718.293416] ? kthread_park+0x180/0x180 [ 718.297372] ret_from_fork+0x24/0x30 [ 718.301332] Kernel Offset: disabled [ 718.304949] Rebooting in 86400 seconds..