Warning: Permanently added '10.128.0.172' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 717.596648] INFO: task syz-executor158:8221 blocked for more than 140 seconds. [ 717.604114] Not tainted 4.19.211-syzkaller #0 [ 717.610676] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.618973] syz-executor158 D27400 8221 8138 0x00000004 [ 717.624624] Call Trace: [ 717.627539] __schedule+0x887/0x2040 [ 717.631258] ? io_schedule_timeout+0x140/0x140 [ 717.635822] ? check_preemption_disabled+0x41/0x280 [ 717.641422] ? mark_held_locks+0xf0/0xf0 [ 717.645509] schedule+0x8d/0x1b0 [ 717.649154] schedule_timeout+0x92d/0xfe0 [ 717.653312] ? update_curr+0x28d/0x870 [ 717.657509] ? usleep_range+0x170/0x170 [ 717.661484] ? try_to_wake_up+0x733/0x1050 [ 717.665716] ? wait_for_common+0x294/0x470 [ 717.670323] ? lock_downgrade+0x720/0x720 [ 717.674468] ? lock_acquire+0x170/0x3c0 [ 717.678722] ? wait_for_common+0x9e/0x470 [ 717.682869] ? _raw_spin_unlock_irq+0x24/0x80 [ 717.687627] wait_for_common+0x29c/0x470 [ 717.691687] ? __flush_work+0x37e/0x8b0 [ 717.695645] ? bit_wait_io_timeout+0x100/0x100 [ 717.700659] ? wake_up_q+0xe0/0xe0 [ 717.704205] ? _raw_spin_unlock_irq+0x24/0x80 [ 717.708962] __flush_work+0x4bb/0x8b0 [ 717.712764] ? alloc_unbound_pwq+0xc10/0xc10 [ 717.717466] ? flush_workqueue_prep_pwqs+0x570/0x570 [ 717.722574] ? _raw_spin_unlock_irq+0x5a/0x80 [ 717.727358] ? __flush_work+0x4cf/0x8b0 [ 717.731334] ? trace_hardirqs_off+0x64/0x200 [ 717.735739] ? __cancel_work_timer+0x3ba/0x590 [ 717.740641] __cancel_work_timer+0x412/0x590 [ 717.745052] ? try_to_grab_pending+0x6f0/0x6f0 [ 717.749945] ? lock_downgrade+0x720/0x720 [ 717.754093] ? lock_acquire+0x170/0x3c0 [ 717.758391] ? p9_fd_close+0x172/0x520 [ 717.762286] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 717.767647] p9_fd_close+0x29c/0x520 [ 717.771453] p9_client_create+0x901/0x12e0 [ 717.775677] ? p9_client_flush+0x490/0x490 [ 717.780265] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 717.785283] ? __lockdep_init_map+0x100/0x5a0 [ 717.790028] ? __raw_spin_lock_init+0x28/0x100 [ 717.794611] v9fs_session_init+0x1dd/0x1770 [ 717.799258] ? gfp_pfmemalloc_allowed+0x150/0x150 [ 717.804112] ? v9fs_show_options+0x760/0x760 [ 717.808774] ? lock_acquire+0x170/0x3c0 [ 717.812751] ? check_preemption_disabled+0x41/0x280 [ 717.818068] ? v9fs_mount+0x54/0x910 [ 717.821785] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 717.827057] ? kmem_cache_alloc_trace+0x323/0x380 [ 717.831900] v9fs_mount+0x73/0x910 [ 717.835435] ? alloc_pages_current+0x19b/0x2a0 [ 717.840335] ? __lockdep_init_map+0x100/0x5a0 [ 717.844831] mount_fs+0xa3/0x310 [ 717.848455] vfs_kern_mount.part.0+0x68/0x470 [ 717.852953] do_mount+0x115c/0x2f50 [ 717.856869] ? do_raw_spin_unlock+0x171/0x230 [ 717.861365] ? check_preemption_disabled+0x41/0x280 [ 717.866372] ? copy_mount_string+0x40/0x40 [ 717.870974] ? copy_mount_options+0x59/0x380 [ 717.875390] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 717.880711] ? kmem_cache_alloc_trace+0x323/0x380 [ 717.885569] ? copy_mount_options+0x26f/0x380 [ 717.890397] ksys_mount+0xcf/0x130 [ 717.893943] __x64_sys_mount+0xba/0x150 [ 717.898276] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.902863] do_syscall_64+0xf9/0x620 [ 717.906932] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.912118] RIP: 0033:0x7f3351de8359 [ 717.915815] Code: Bad RIP value. [ 717.919748] RSP: 002b:00007f3351d74278 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 717.927710] RAX: ffffffffffffffda RBX: 00007f3351e6d4f0 RCX: 00007f3351de8359 [ 717.934966] RDX: 0000000020000080 RSI: 0000000020000300 RDI: 0000000000000000 [ 717.942507] RBP: 00007f3351e3a0bc R08: 0000000020000740 R09: 65732f636f72702f [ 717.949968] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3351d74280 [ 717.957624] R13: 7277732f7665642f R14: 64663d736e617274 R15: 00007f3351e6d4f8 [ 717.964944] [ 717.964944] Showing all locks held in the system: [ 717.971599] 2 locks held by kworker/0:1/14: [ 717.975914] #0: 00000000e305f09a ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 [ 717.985704] #1: 000000003e9ac0c2 ((work_completion)(&m->rq)){+.+.}, at: process_one_work+0x79c/0x1570 [ 717.995510] 1 lock held by khungtaskd/1570: [ 718.000038] #0: 00000000eca63a1d (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 718.008765] 1 lock held by in:imklog/7824: [ 718.012987] #0: 0000000040d68714 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 [ 718.021032] [ 718.022651] ============================================= [ 718.022651] [ 718.029721] NMI backtrace for cpu 1 [ 718.033357] CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.040779] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.050107] Call Trace: [ 718.052678] dump_stack+0x1fc/0x2ef [ 718.056290] nmi_cpu_backtrace.cold+0x63/0xa2 [ 718.060768] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.065247] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 718.070505] watchdog+0x991/0xe60 [ 718.073939] ? reset_hung_task_detector+0x30/0x30 [ 718.078763] kthread+0x33f/0x460 [ 718.082107] ? kthread_park+0x180/0x180 [ 718.086061] ret_from_fork+0x24/0x30 [ 718.089847] Sending NMI from CPU 1 to CPUs 0: [ 718.094832] NMI backtrace for cpu 0 [ 718.094838] CPU: 0 PID: 4690 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 [ 718.094844] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.094849] RIP: 0010:__sanitizer_cov_trace_pc+0x14/0x50 [ 718.094859] Code: 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 00 01 1f 00 75 2b 8b 90 60 13 00 00 83 fa 02 75 20 48 8b 88 [ 718.094863] RSP: 0018:ffff8880a139fa28 EFLAGS: 00000246 [ 718.094871] RAX: ffff8880a1394500 RBX: dffffc0000000000 RCX: ffffffff816c5cc8 [ 718.094876] RDX: 0000000080000000 RSI: ffffffff816c36e5 RDI: ffffc90001b12072 [ 718.094881] RBP: ffff8880a139fb00 R08: 0000000000000000 R09: 0000000000000015 [ 718.094886] R10: 0000000000000006 R11: 0000000000000000 R12: ffffffff886fb460 [ 718.094891] R13: ffffed1014273f62 R14: ffffc90001b121e0 R15: 0000000040000000 [ 718.094896] FS: 00007f293b3f08c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 718.094901] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.094906] CR2: 00007f29387c9000 CR3: 00000000a1186000 CR4: 00000000003406f0 [ 718.094911] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.094916] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.094918] Call Trace: [ 718.094922] ___bpf_prog_run+0x45/0x4e80 [ 718.094925] ? __bpf_prog_run32+0x8f/0xd0 [ 718.094929] ? __bpf_prog_run64+0xd0/0xd0 [ 718.094932] ? __lock_acquire+0x6de/0x3ff0 [ 718.094936] ? trace_hardirqs_off+0x64/0x200 [ 718.094940] ? mark_held_locks+0xf0/0xf0 [ 718.094943] ? seccomp_run_filters+0x124/0x590 [ 718.094947] ? debug_object_activate+0x12f/0x450 [ 718.094951] ? __put_seccomp_filter+0xa0/0xa0 [ 718.094954] ? __lock_acquire+0x6de/0x3ff0 [ 718.094958] ? __seccomp_filter+0x93/0xca0 [ 718.094961] ? seccomp_send_sigsys+0x1c0/0x1c0 [ 718.094965] ? mark_held_locks+0xf0/0xf0 [ 718.094969] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 718.094973] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 718.094977] ? debug_object_active_state+0x254/0x330 [ 718.094980] ? debug_object_init_on_stack+0x20/0x20 [ 718.094984] ? kfree+0x110/0x210 [ 718.094987] ? task_work_run+0x11c/0x1c0 [ 718.094991] ? __secure_computing+0xfc/0x360 [ 718.094994] ? syscall_trace_enter+0x563/0xd60 [ 718.094998] ? blkcg_schedule_throttle+0x1f0/0x1f0 [ 718.095002] ? syscall_slow_exit_work+0x630/0x630 [ 718.095006] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 718.095010] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 718.095014] ? trace_hardirqs_off_caller+0x6e/0x210 [ 718.095017] ? do_syscall_64+0x21/0x620 [ 718.095021] ? do_syscall_64+0x486/0x620 [ 718.095025] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.095350] Kernel panic - not syncing: hung_task: blocked tasks [ 718.355757] CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.363179] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.372511] Call Trace: [ 718.375082] dump_stack+0x1fc/0x2ef [ 718.378694] panic+0x26a/0x50e [ 718.381866] ? __warn_printk+0xf3/0xf3 [ 718.385732] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 718.390828] ? cpumask_next+0x3c/0x40 [ 718.394613] ? printk_safe_flush+0xd6/0x120 [ 718.398913] ? watchdog+0x991/0xe60 [ 718.402575] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.408017] watchdog+0x9a2/0xe60 [ 718.411468] ? reset_hung_task_detector+0x30/0x30 [ 718.416308] kthread+0x33f/0x460 [ 718.419667] ? kthread_park+0x180/0x180 [ 718.423629] ret_from_fork+0x24/0x30 [ 718.427663] Kernel Offset: disabled [ 718.431285] Rebooting in 86400 seconds..