[ 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 '10.128.0.15' (ECDSA) to the list of known hosts. syzkaller login: [ 487.657516] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 717.592386] INFO: task syz-executor380:8189 blocked for more than 140 seconds. [ 717.599938] Not tainted 4.19.211-syzkaller #0 [ 717.605817] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.613901] syz-executor380 D28416 8189 8138 0x00000004 [ 717.619530] Call Trace: [ 717.622104] __schedule+0x887/0x2040 [ 717.625861] ? io_schedule_timeout+0x140/0x140 [ 717.630441] ? mark_held_locks+0xf0/0xf0 [ 717.634544] schedule+0x8d/0x1b0 [ 717.637906] schedule_timeout+0x92d/0xfe0 [ 717.642059] ? usleep_range+0x170/0x170 [ 717.646589] ? check_preemption_disabled+0x41/0x280 [ 717.651645] ? wait_for_common+0x294/0x470 [ 717.655922] ? lock_downgrade+0x720/0x720 [ 717.660062] ? lock_acquire+0x170/0x3c0 [ 717.664068] ? wait_for_common+0x9e/0x470 [ 717.668217] ? _raw_spin_unlock_irq+0x24/0x80 [ 717.672807] wait_for_common+0x29c/0x470 [ 717.676864] ? __flush_work+0x37e/0x8b0 [ 717.680819] ? bit_wait_io_timeout+0x100/0x100 [ 717.685436] ? wake_up_q+0xe0/0xe0 [ 717.688973] ? get_pwq+0x8c/0x140 [ 717.692474] ? _raw_spin_unlock_irq+0x24/0x80 [ 717.696976] __flush_work+0x4bb/0x8b0 [ 717.700761] ? alloc_unbound_pwq+0xc10/0xc10 [ 717.705213] ? flush_workqueue_prep_pwqs+0x570/0x570 [ 717.710319] ? _raw_spin_unlock_irq+0x5a/0x80 [ 717.714853] ? __flush_work+0x4cf/0x8b0 [ 717.718826] ? trace_hardirqs_off+0x64/0x200 [ 717.723267] ? __cancel_work_timer+0x3ba/0x590 [ 717.727851] __cancel_work_timer+0x412/0x590 [ 717.732299] ? try_to_grab_pending+0x6f0/0x6f0 [ 717.736879] ? lock_downgrade+0x720/0x720 [ 717.741006] ? lock_acquire+0x170/0x3c0 [ 717.745008] ? p9_fd_close+0x172/0x520 [ 717.748891] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 717.754030] p9_fd_close+0x29c/0x520 [ 717.757741] p9_client_create+0x901/0x12e0 [ 717.761960] ? p9_client_flush+0x490/0x490 [ 717.766235] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 717.771267] ? __lockdep_init_map+0x100/0x5a0 [ 717.775802] ? __raw_spin_lock_init+0x28/0x100 [ 717.780379] v9fs_session_init+0x1dd/0x1770 [ 717.784747] ? gfp_pfmemalloc_allowed+0x150/0x150 [ 717.789581] ? v9fs_show_options+0x760/0x760 [ 717.794167] ? lock_acquire+0x170/0x3c0 [ 717.798136] ? check_preemption_disabled+0x41/0x280 [ 717.803192] ? v9fs_mount+0x54/0x910 [ 717.806903] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 717.811901] ? kmem_cache_alloc_trace+0x323/0x380 [ 717.816779] v9fs_mount+0x73/0x910 [ 717.820312] ? alloc_pages_current+0x19b/0x2a0 [ 717.824922] ? __lockdep_init_map+0x100/0x5a0 [ 717.829411] mount_fs+0xa3/0x310 [ 717.832814] vfs_kern_mount.part.0+0x68/0x470 [ 717.837309] do_mount+0x115c/0x2f50 [ 717.840918] ? lock_acquire+0x170/0x3c0 [ 717.845045] ? check_preemption_disabled+0x41/0x280 [ 717.850062] ? copy_mount_string+0x40/0x40 [ 717.854346] ? copy_mount_options+0x59/0x380 [ 717.858753] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 717.863801] ? kmem_cache_alloc_trace+0x323/0x380 [ 717.868643] ? copy_mount_options+0x26f/0x380 [ 717.873212] ksys_mount+0xcf/0x130 [ 717.876747] __x64_sys_mount+0xba/0x150 [ 717.880706] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.885317] do_syscall_64+0xf9/0x620 [ 717.889123] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.894347] RIP: 0033:0x7f3fbc4435b9 [ 717.898056] Code: Bad RIP value. [ 717.901397] RSP: 002b:00007f3fbc3d32f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 717.909137] RAX: ffffffffffffffda RBX: 00007f3fbc4cc4f0 RCX: 00007f3fbc4435b9 [ 717.916459] RDX: 00000000200000c0 RSI: 0000000020000040 RDI: 0000000000000000 [ 717.923757] RBP: 00007f3fbc499184 R08: 0000000020000b40 R09: 0000000000000000 [ 717.931016] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 717.938320] R13: 64663d736e617274 R14: 753d737365636361 R15: 00007f3fbc4cc4f8 [ 717.945661] [ 717.945661] Showing all locks held in the system: [ 717.951976] 2 locks held by kworker/0:1/14: [ 717.956317] #0: 00000000437807ab ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 [ 717.965658] #1: 0000000072805a19 ((work_completion)(&m->rq)){+.+.}, at: process_one_work+0x79c/0x1570 [ 717.975162] 1 lock held by khungtaskd/1570: [ 717.979473] #0: 00000000fb2d4e8f (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 717.988119] [ 717.989733] ============================================= [ 717.989733] [ 717.997173] NMI backtrace for cpu 0 [ 718.000817] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.008241] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.017572] Call Trace: [ 718.020149] dump_stack+0x1fc/0x2ef [ 718.023759] nmi_cpu_backtrace.cold+0x63/0xa2 [ 718.028233] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.032706] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 718.037965] watchdog+0x991/0xe60 [ 718.041401] ? reset_hung_task_detector+0x30/0x30 [ 718.046221] kthread+0x33f/0x460 [ 718.049572] ? kthread_park+0x180/0x180 [ 718.053529] ret_from_fork+0x24/0x30 [ 718.057316] Sending NMI from CPU 0 to CPUs 1: [ 718.062067] NMI backtrace for cpu 1 [ 718.062073] CPU: 1 PID: 4689 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 [ 718.062079] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.062083] RIP: 0010:do_syscall_64+0x37e/0x620 [ 718.062094] Code: fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e d4 01 00 00 83 63 08 f9 0f 1f 44 00 00 e8 d9 0b 62 00 0f 00 2d 02 e4 5f 07 <48> 83 c4 08 5b 5d 41 5c 41 5d e9 c3 0b 62 00 e8 be 0b 62 00 48 b8 [ 718.062098] RSP: 0018:ffff8880a0c17f28 EFLAGS: 000000d3 [ 718.062108] RAX: ffff8880a0c0e4c0 RBX: ffff8880a0c0e4c0 RCX: ffffffff81007956 [ 718.062113] RDX: 0000000000000000 RSI: ffffffff81007997 RDI: ffff8880a0c0e4c8 [ 718.062118] RBP: ffff8880a0c17f58 R08: 0000000000000001 R09: 0000000000000000 [ 718.062122] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 [ 718.062127] R13: 0000000000000100 R14: 0000000000000000 R15: 0000000000000000 [ 718.062133] FS: 00007f16fa8b48c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 718.062138] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.062143] CR2: 00007f16f7c881d0 CR3: 00000000a0cd8000 CR4: 00000000003406e0 [ 718.062148] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.062153] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.062155] Call Trace: [ 718.062160] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.062163] RIP: 0033:0x7f16f9b7d2e3 [ 718.062174] Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 29 54 2b 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 0b c2 00 00 48 89 04 24 [ 718.062178] RSP: 002b:00007ffffed484b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 [ 718.062187] RAX: 0000000000000001 RBX: 0000562ffe7da1e0 RCX: 00007f16f9b7d2e3 [ 718.062192] RDX: 0000000000000013 RSI: 00007ffffed484c0 RDI: 0000000000000008 [ 718.062196] RBP: 00007ffffed486b0 R08: 00007ffffedd4000 R09: 000000b8caac8940 [ 718.062201] R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffffed484c0 [ 718.062206] R13: 0000000000000001 R14: ffffffffffffffff R15: 0005d9593b4c8c3d [ 718.062843] Kernel panic - not syncing: hung_task: blocked tasks [ 718.264176] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.271602] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.280927] Call Trace: [ 718.283499] dump_stack+0x1fc/0x2ef [ 718.287118] panic+0x26a/0x50e [ 718.290289] ? __warn_printk+0xf3/0xf3 [ 718.294169] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.298645] ? ___preempt_schedule+0x16/0x18 [ 718.303035] ? watchdog+0x991/0xe60 [ 718.306641] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.312070] watchdog+0x9a2/0xe60 [ 718.315506] ? reset_hung_task_detector+0x30/0x30 [ 718.320328] kthread+0x33f/0x460 [ 718.323684] ? kthread_park+0x180/0x180 [ 718.327638] ret_from_fork+0x24/0x30 [ 718.331604] Kernel Offset: disabled [ 718.335261] Rebooting in 86400 seconds..