[ 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 '10.128.1.114' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 717.785879] INFO: task syz-executor267:8145 blocked for more than 140 seconds. [ 717.793334] Not tainted 4.19.211-syzkaller #0 [ 717.798833] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.807847] syz-executor267 D26816 8145 8143 0x00000004 [ 717.813499] Call Trace: [ 717.816128] __schedule+0x887/0x2040 [ 717.819879] ? io_schedule_timeout+0x140/0x140 [ 717.824572] ? _raw_spin_unlock+0x29/0x40 [ 717.829034] schedule+0x8d/0x1b0 [ 717.832604] fuse_wait_on_page_writeback.isra.0+0x11b/0x170 [ 717.839249] ? fuse_do_ioctl+0x1850/0x1850 [ 717.843636] ? wait_woken+0x250/0x250 [ 717.847774] ? fuse_writepage_locked+0xb63/0x1010 [ 717.852721] ? fuse_writepage_locked+0x1010/0x1010 [ 717.857773] fuse_launder_page+0xb6/0xe0 [ 717.861985] invalidate_inode_pages2_range+0x795/0x1110 [ 717.867434] ? clear_shadow_entry+0x170/0x170 [ 717.871933] ? fuse_file_alloc+0x1d9/0x270 [ 717.876339] ? do_raw_spin_unlock+0x171/0x230 [ 717.880861] ? _raw_spin_unlock+0x29/0x40 [ 717.885026] ? fuse_do_open+0x1c4/0x500 [ 717.889119] fuse_finish_open+0x2e2/0x590 [ 717.893280] fuse_open_common+0x254/0x2c0 [ 717.897519] do_dentry_open+0x4aa/0x1160 [ 717.901603] ? fuse_open_common+0x2c0/0x2c0 [ 717.905995] ? inode_permission.part.0+0x10c/0x450 [ 717.911104] ? chown_common+0x550/0x550 [ 717.915070] ? inode_permission+0x3d/0x140 [ 717.919836] path_openat+0x793/0x2df0 [ 717.923648] ? path_lookupat+0x8d0/0x8d0 [ 717.927804] ? mark_held_locks+0xf0/0xf0 [ 717.931964] do_filp_open+0x18c/0x3f0 [ 717.935836] ? may_open_dev+0xf0/0xf0 [ 717.939930] ? lock_downgrade+0x720/0x720 [ 717.944084] ? lock_acquire+0x170/0x3c0 [ 717.948136] ? __alloc_fd+0x34/0x570 [ 717.951943] ? do_raw_spin_unlock+0x171/0x230 [ 717.956507] ? _raw_spin_unlock+0x29/0x40 [ 717.960661] ? __alloc_fd+0x28d/0x570 [ 717.964527] do_sys_open+0x3b3/0x520 [ 717.968319] ? filp_open+0x70/0x70 [ 717.971960] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 717.977381] ? trace_hardirqs_off_caller+0x6e/0x210 [ 717.982400] ? do_syscall_64+0x21/0x620 [ 717.986434] do_syscall_64+0xf9/0x620 [ 717.990239] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.995418] RIP: 0033:0x7fe98f695529 [ 717.999185] Code: Bad RIP value. [ 718.002736] RSP: 002b:00007fe98f6462f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 718.010624] RAX: ffffffffffffffda RBX: 00007fe98f7264c0 RCX: 00007fe98f695529 [ 718.017962] RDX: 0000000000000000 RSI: 0000000000000700 RDI: 0000000020000100 [ 718.025232] RBP: 00007fe98f6f3164 R08: 0000000000000000 R09: 0000000000000000 [ 718.032610] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 718.040046] R13: 00007fe98f6ef158 R14: 00007fe98f6f1160 R15: 00007fe98f7264c8 [ 718.047422] [ 718.047422] Showing all locks held in the system: [ 718.054221] 1 lock held by khungtaskd/1570: [ 718.058625] #0: 0000000005e3330e (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 718.067565] 1 lock held by in:imklog/7855: [ 718.071868] #0: 0000000066fce59d (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 [ 718.079913] 2 locks held by syz-executor267/8145: [ 718.084834] #0: 000000008b884afa (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0 [ 718.093155] #1: 0000000044132a43 (&sb->s_type->i_mutex_key#17){+.+.}, at: fuse_open_common+0x1bc/0x2c0 [ 718.102855] [ 718.104479] ============================================= [ 718.104479] [ 718.111584] NMI backtrace for cpu 0 [ 718.115226] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.122936] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.132282] Call Trace: [ 718.134870] dump_stack+0x1fc/0x2ef [ 718.138497] nmi_cpu_backtrace.cold+0x63/0xa2 [ 718.143067] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.147778] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 718.153065] watchdog+0x991/0xe60 [ 718.156529] ? reset_hung_task_detector+0x30/0x30 [ 718.161365] kthread+0x33f/0x460 [ 718.164721] ? kthread_park+0x180/0x180 [ 718.168691] ret_from_fork+0x24/0x30 [ 718.172526] Sending NMI from CPU 0 to CPUs 1: [ 718.177601] NMI backtrace for cpu 1 [ 718.177608] CPU: 1 PID: 10 Comm: rcu_preempt Not tainted 4.19.211-syzkaller #0 [ 718.177614] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.177618] RIP: 0010:debug_object_assert_init+0x0/0x2e0 [ 718.177629] Code: ff ff 48 c7 c7 b0 df 26 8b e8 cc 1f 21 fe e9 95 fe ff ff e8 c2 1f 21 fe e9 1e ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <41> 57 41 56 41 55 41 54 49 bc 00 00 00 00 00 fc ff df 55 53 48 81 [ 718.177633] RSP: 0018:ffff8880b5a67b98 EFLAGS: 00000293 [ 718.177641] RAX: ffff8880b5a4e280 RBX: 1ffff11016b4cf74 RCX: ffffffff81538235 [ 718.177646] RDX: 0000000000000000 RSI: ffffffff89f90a40 RDI: ffff8880b5a67cc0 [ 718.177651] RBP: 0000000000000200 R08: ffffffff8cd55f50 R09: 0000000000000000 [ 718.177656] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b5a67cc0 [ 718.177661] R13: dffffc0000000000 R14: ffff8880ba122b40 R15: 00000000ffffffff [ 718.177666] FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 718.177671] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.177676] CR2: 00007fddb6505000 CR3: 00000000a13f3000 CR4: 00000000003406e0 [ 718.177681] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.177686] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.177689] Call Trace: [ 718.177693] try_to_del_timer_sync+0x6d/0x110 [ 718.177697] ? detach_if_pending+0x460/0x460 [ 718.177700] ? del_timer_sync+0x75/0x270 [ 718.177704] ? del_timer_sync+0x1cc/0x270 [ 718.177708] del_timer_sync+0x1a4/0x270 [ 718.177711] schedule_timeout+0x4d7/0xfe0 [ 718.177715] ? prepare_to_swait_event+0x5b/0x540 [ 718.177718] ? usleep_range+0x170/0x170 [ 718.177723] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 718.177726] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 718.177730] ? collect_expired_timers+0x2a0/0x2a0 [ 718.177734] ? swake_up_all+0x340/0x340 [ 718.177737] rcu_gp_kthread+0xdad/0x21c0 [ 718.177741] ? lock_acquire+0x170/0x3c0 [ 718.177744] ? __rcu_read_unlock+0x160/0x160 [ 718.177748] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 718.177752] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 718.177756] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 718.177760] ? __kthread_parkme+0x133/0x1e0 [ 718.177763] ? __rcu_read_unlock+0x160/0x160 [ 718.177766] kthread+0x33f/0x460 [ 718.177770] ? kthread_park+0x180/0x180 [ 718.177773] ret_from_fork+0x24/0x30 [ 718.178230] Kernel panic - not syncing: hung_task: blocked tasks [ 718.410699] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.418210] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.427805] Call Trace: [ 718.430381] dump_stack+0x1fc/0x2ef [ 718.433995] panic+0x26a/0x50e [ 718.437168] ? __warn_printk+0xf3/0xf3 [ 718.441042] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 718.446297] ? cpumask_next+0x3c/0x40 [ 718.450090] ? printk_safe_flush+0xd6/0x120 [ 718.454412] ? watchdog+0x991/0xe60 [ 718.458571] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.464016] watchdog+0x9a2/0xe60 [ 718.467459] ? reset_hung_task_detector+0x30/0x30 [ 718.473154] kthread+0x33f/0x460 [ 718.476505] ? kthread_park+0x180/0x180 [ 718.480462] ret_from_fork+0x24/0x30 [ 718.484431] Kernel Offset: disabled [ 718.488061] Rebooting in 86400 seconds..