[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 27.877569] kauditd_printk_skb: 7 callbacks suppressed [ 27.877580] audit: type=1800 audit(1540846803.758:29): pid=5557 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 27.903939] audit: type=1800 audit(1540846803.758:30): pid=5557 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.16' (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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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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 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 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 executing program executing program executing program executing program executing program 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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 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 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 executing program executing program executing program executing program executing program 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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 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 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 executing program executing program executing program executing program executing program 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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 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 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 executing program executing program executing program executing program executing program 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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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 executing program executing program syzkaller login: [ 187.461823] INFO: task syz-executor721:5714 blocked for more than 140 seconds. [ 187.469376] Not tainted 4.19.0+ #309 [ 187.474679] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 187.482829] syz-executor721 D21936 5714 5712 0x00000004 [ 187.488478] Call Trace: [ 187.491087] __schedule+0x8cf/0x21d0 [ 187.494859] ? __sched_text_start+0x8/0x8 [ 187.499038] ? zap_class+0x640/0x640 [ 187.502910] ? __account_cfs_rq_runtime+0x790/0x790 [ 187.507936] ? zap_class+0x640/0x640 [ 187.511754] ? find_held_lock+0x36/0x1c0 [ 187.515838] ? zap_class+0x640/0x640 [ 187.519552] schedule+0xfe/0x460 [ 187.523062] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 187.528183] ? __schedule+0x21d0/0x21d0 [ 187.532240] ? find_held_lock+0x36/0x1c0 [ 187.536328] ? wait_for_completion+0x41f/0x8a0 [ 187.540908] schedule_timeout+0x1cc/0x260 [ 187.545189] ? usleep_range+0x1a0/0x1a0 [ 187.549186] ? wait_for_completion+0x41f/0x8a0 [ 187.553846] ? trace_hardirqs_off_caller+0x310/0x310 [ 187.558971] wait_for_completion+0x427/0x8a0 [ 187.563497] ? wait_for_completion_interruptible+0x840/0x840 [ 187.569350] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 187.574981] ? wake_up_q+0x100/0x100 [ 187.578725] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 187.584434] ? rcu_pm_notify+0xc0/0xc0 [ 187.588355] kthread_stop+0x1a9/0x900 [ 187.592211] ? kthread_unpark+0x160/0x160 [ 187.596381] ? find_held_lock+0x36/0x1c0 [ 187.600449] ? lock_acquire+0x1ed/0x520 [ 187.604576] ? mutex_unlock+0xd/0x10 [ 187.608308] ? v4l2_ctrl_grab+0x115/0x160 [ 187.612535] vivid_stop_generating_vid_cap+0x2bc/0x93b [ 187.617825] ? vivid_start_generating_vid_cap+0x4c0/0x4c0 [ 187.623486] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 187.628601] ? _vb2_fop_release+0x3f/0x2b0 [ 187.632902] ? try_to_wake_up+0x11c/0x1490 [ 187.637162] ? zap_class+0x640/0x640 [ 187.640879] ? mutex_trylock+0x2b0/0x2b0 [ 187.645080] ? migrate_swap_stop+0x8a0/0x8a0 [ 187.649503] ? find_held_lock+0x36/0x1c0 [ 187.653618] vid_cap_stop_streaming+0x8d/0xe0 [ 187.658129] ? vid_cap_buf_queue+0x310/0x310 executing program [ 187.662668] __vb2_queue_cancel+0x171/0xca0 [ 187.666999] ? lock_downgrade+0x900/0x900 [ 187.671140] ? debug_mutex_lock_common+0x130/0x130 [ 187.677826] ? __vb2_dqbuf.part.5+0x260/0x260 [ 187.682709] ? kasan_check_read+0x11/0x20 [ 187.687076] ? do_raw_spin_unlock+0xa7/0x330 [ 187.691494] ? do_raw_spin_trylock+0x270/0x270 [ 187.696186] ? kasan_check_write+0x14/0x20 [ 187.700452] ? wake_up_q+0xb3/0x100 [ 187.704130] ? __mutex_unlock_slowpath+0x43c/0x8c0 [ 187.709088] ? kasan_check_read+0x11/0x20 [ 187.713295] ? wait_for_completion+0x8a0/0x8a0 [ 187.717908] ? trace_hardirqs_off_caller+0x310/0x310 [ 187.723054] ? vfs_lock_file+0xe0/0xe0 [ 187.726957] ? vb2_core_poll+0x9b0/0x9b0 [ 187.731012] vb2_core_streamoff+0x60/0x140 [ 187.735328] __vb2_cleanup_fileio+0x73/0x160 [ 187.739750] vb2_core_queue_release+0x1e/0x80 [ 187.744942] _vb2_fop_release+0x1d2/0x2b0 [ 187.749101] vb2_fop_release+0x77/0xc0 [ 187.753036] vivid_fop_release+0x18e/0x440 [ 187.757295] ? vivid_remove+0x460/0x460 [ 187.761273] ? dev_debug_store+0x140/0x140 [ 187.765563] v4l2_release+0xfb/0x1a0 [ 187.769293] __fput+0x385/0xa30 [ 187.772662] ? get_max_files+0x20/0x20 [ 187.776565] ? trace_hardirqs_on+0xbd/0x310 [ 187.780877] ? kasan_check_read+0x11/0x20 [ 187.785074] ? task_work_run+0x1af/0x2a0 [ 187.789152] ? trace_hardirqs_off_caller+0x310/0x310 [ 187.794314] ? filp_close+0x1cd/0x250 [ 187.798138] ____fput+0x15/0x20 [ 187.801411] task_work_run+0x1e8/0x2a0 [ 187.805358] ? task_work_cancel+0x240/0x240 [ 187.809698] ? copy_fd_bitmaps+0x210/0x210 [ 187.813976] ? do_syscall_64+0x9a/0x820 [ 187.817968] exit_to_usermode_loop+0x318/0x380 [ 187.822624] ? __bpf_trace_sys_exit+0x30/0x30 [ 187.827134] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 187.832723] do_syscall_64+0x6be/0x820 [ 187.836644] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 187.842092] ? syscall_return_slowpath+0x5e0/0x5e0 [ 187.847029] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 187.851921] ? trace_hardirqs_on_caller+0x310/0x310 [ 187.856963] ? prepare_exit_to_usermode+0x3b0/0x3b0 executing program [ 187.862050] ? prepare_exit_to_usermode+0x291/0x3b0 [ 187.867081] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 187.872644] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 187.877869] RIP: 0033:0x400f00 [ 187.881068] Code: 01 f0 ff ff 0f 83 b0 0a 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d cd 57 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 84 0a 00 00 c3 48 83 ec 08 e8 3a 01 00 00 [ 187.901621] RSP: 002b:00007ffda0a741b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 187.909456] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400f00 [ 187.917088] RDX: 00000000000000f6 RSI: 0000000020000240 RDI: 0000000000000003 [ 187.924409] RBP: 0000000000000000 R08: 0000000001522880 R09: 00000000004002e0 [ 187.931756] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401e10 [ 187.939023] R13: 0000000000401ea0 R14: 0000000000000000 R15: 0000000000000000 [ 187.946381] INFO: task syz-executor721:5725 blocked for more than 140 seconds. [ 187.953784] Not tainted 4.19.0+ #309 [ 187.958027] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 187.966037] syz-executor721 D21848 5725 5715 0x00000004 [ 187.971733] Call Trace: [ 187.974335] __schedule+0x8cf/0x21d0 [ 187.978047] ? __sched_text_start+0x8/0x8 [ 187.982242] ? zap_class+0x640/0x640 [ 187.985971] ? zap_class+0x640/0x640 [ 187.989682] ? print_usage_bug+0xc0/0xc0 [ 187.993788] ? __lock_acquire+0x62f/0x4c20 [ 187.998042] ? find_held_lock+0x36/0x1c0 [ 188.002777] ? find_held_lock+0x36/0x1c0 [ 188.006844] ? zap_class+0x640/0x640 [ 188.010547] schedule+0xfe/0x460 [ 188.014221] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 188.019340] ? __schedule+0x21d0/0x21d0 [ 188.023377] ? find_held_lock+0x36/0x1c0 [ 188.027458] ? wait_for_completion+0x41f/0x8a0 [ 188.032096] schedule_timeout+0x1cc/0x260 [ 188.036258] ? usleep_range+0x1a0/0x1a0 [ 188.040220] ? wait_for_completion+0x41f/0x8a0 [ 188.044855] ? trace_hardirqs_off_caller+0x310/0x310 [ 188.049988] wait_for_completion+0x427/0x8a0 [ 188.054452] ? vivid_stop_generating_vid_cap+0x291/0x93b [ 188.059918] ? wait_for_completion_interruptible+0x840/0x840 [ 188.065759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 188.071324] ? wake_up_q+0x100/0x100 [ 188.075109] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 188.080669] ? rcu_pm_notify+0xc0/0xc0 [ 188.084621] kthread_stop+0x1a9/0x900 [ 188.088458] ? kthread_unpark+0x160/0x160 [ 188.092669] ? lock_acquire+0x1ed/0x520 [ 188.096658] ? _vb2_fop_release+0x3f/0x2b0 [ 188.100902] ? mutex_unlock+0xd/0x10 [ 188.104668] ? v4l2_ctrl_grab+0x115/0x160 [ 188.108847] vivid_stop_generating_vid_cap+0x2bc/0x93b executing program [ 188.114184] ? vivid_start_generating_vid_cap+0x4c0/0x4c0 [ 188.119738] ? _vb2_fop_release+0x3f/0x2b0 [ 188.124046] ? mutex_trylock+0x2b0/0x2b0 [ 188.128843] ? vivid_fop_release+0x66/0x440 [ 188.133899] ? find_held_lock+0x36/0x1c0 [ 188.138131] vid_cap_stop_streaming+0x8d/0xe0 [ 188.142713] ? vid_cap_buf_queue+0x310/0x310 [ 188.147140] __vb2_queue_cancel+0x171/0xca0 [ 188.151461] ? lock_downgrade+0x900/0x900 [ 188.155744] ? __vb2_dqbuf.part.5+0x260/0x260 [ 188.160251] ? find_held_lock+0x36/0x1c0 [ 188.164388] ? mark_held_locks+0xc7/0x130 [ 188.168556] ? kasan_check_write+0x14/0x20 [ 188.173091] ? __mutex_unlock_slowpath+0x197/0x8c0 [ 188.178039] ? kasan_check_read+0x11/0x20 [ 188.182324] ? wait_for_completion+0x8a0/0x8a0 [ 188.186915] ? trace_hardirqs_off_caller+0x310/0x310 [ 188.192135] ? vfs_lock_file+0xe0/0xe0 [ 188.196048] ? vb2_core_poll+0x9b0/0x9b0 [ 188.200102] vb2_core_streamoff+0x60/0x140 [ 188.204415] __vb2_cleanup_fileio+0x73/0x160 [ 188.208843] vb2_core_queue_release+0x1e/0x80 [ 188.213468] _vb2_fop_release+0x1d2/0x2b0 [ 188.217628] vb2_fop_release+0x77/0xc0 [ 188.221506] vivid_fop_release+0x18e/0x440 [ 188.225795] ? vivid_remove+0x460/0x460 [ 188.229787] ? dev_debug_store+0x140/0x140 [ 188.234133] v4l2_release+0xfb/0x1a0 [ 188.237862] __fput+0x385/0xa30 [ 188.241154] ? get_max_files+0x20/0x20 [ 188.245108] ? trace_hardirqs_on+0xbd/0x310 [ 188.249444] ? kasan_check_read+0x11/0x20 [ 188.253719] ? task_work_run+0x1af/0x2a0 [ 188.257792] ? trace_hardirqs_off_caller+0x310/0x310 [ 188.262966] ? filp_close+0x1cd/0x250 [ 188.266788] ____fput+0x15/0x20 [ 188.270063] task_work_run+0x1e8/0x2a0 [ 188.274077] ? task_work_cancel+0x240/0x240 [ 188.278422] ? copy_fd_bitmaps+0x210/0x210 [ 188.282735] ? do_syscall_64+0x9a/0x820 [ 188.286734] exit_to_usermode_loop+0x318/0x380 [ 188.291338] ? __bpf_trace_sys_exit+0x30/0x30 [ 188.295972] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 188.301535] do_syscall_64+0x6be/0x820 [ 188.305492] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 188.310876] ? syscall_return_slowpath+0x5e0/0x5e0 executing program [ 188.315931] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 188.320796] ? trace_hardirqs_on_caller+0x310/0x310 [ 188.325904] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 188.330945] ? prepare_exit_to_usermode+0x291/0x3b0 [ 188.337728] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 188.343076] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 188.348400] RIP: 0033:0x400f00 [ 188.351591] Code: 00 00 00 00 00 00 a8 01 00 00 00 00 00 00 36 01 00 00 b5 00 00 00 01 02 00 00 00 00 00 00 00 00 00 00 6a 01 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 188.370579] RSP: 002b:00007ffda0a741b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 188.378367] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400f00 [ 188.385696] RDX: 00000000000000f6 RSI: 0000000020000240 RDI: 0000000000000003 [ 188.393522] RBP: 0000000000000000 R08: 0000000001522880 R09: 00000000004002e0 [ 188.400797] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000009c76 [ 188.408130] R13: 0000000000401ea0 R14: 0000000000000000 R15: 0000000000000000 [ 188.415463] INFO: task syz-executor721:5731 blocked for more than 140 seconds. [ 188.423261] Not tainted 4.19.0+ #309 [ 188.427507] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 188.435546] syz-executor721 D21848 5731 5718 0x00000004 [ 188.441194] Call Trace: [ 188.443865] __schedule+0x8cf/0x21d0 [ 188.447594] ? __sched_text_start+0x8/0x8 [ 188.451831] ? __sched_text_start+0x8/0x8 [ 188.456007] ? zap_class+0x640/0x640 [ 188.459738] ? lock_downgrade+0x900/0x900 [ 188.463959] ? zap_class+0x640/0x640 [ 188.467715] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 188.472390] ? retint_kernel+0x2d/0x2d [ 188.476313] ? trace_hardirqs_on_caller+0xc0/0x310 [ 188.481248] ? find_held_lock+0x36/0x1c0 [ 188.485372] ? zap_class+0x640/0x640 [ 188.489113] schedule+0xfe/0x460 [ 188.492564] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 188.497682] ? __schedule+0x21d0/0x21d0 [ 188.501714] ? find_held_lock+0x36/0x1c0 [ 188.505793] ? wait_for_completion+0x41f/0x8a0 [ 188.510402] schedule_timeout+0x1cc/0x260 executing program [ 188.514606] ? usleep_range+0x1a0/0x1a0 [ 188.518592] ? wait_for_completion+0x41f/0x8a0 [ 188.523864] ? trace_hardirqs_off_caller+0x310/0x310 [ 188.528996] wait_for_completion+0x427/0x8a0 [ 188.533470] ? vivid_stop_generating_vid_cap+0x291/0x93b [ 188.538938] ? wait_for_completion_interruptible+0x840/0x840 [ 188.544792] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 188.550356] ? wake_up_q+0x100/0x100 [ 188.554155] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 188.559818] ? rcu_pm_notify+0xc0/0xc0 [ 188.563785] kthread_stop+0x1a9/0x900 [ 188.567607] ? kthread_unpark+0x160/0x160 [ 188.571837] ? lock_acquire+0x1ed/0x520 [ 188.575833] ? _vb2_fop_release+0x3f/0x2b0 [ 188.580083] ? mutex_unlock+0xd/0x10 [ 188.583901] ? v4l2_ctrl_grab+0x115/0x160 [ 188.588077] vivid_stop_generating_vid_cap+0x2bc/0x93b [ 188.593448] ? vivid_start_generating_vid_cap+0x4c0/0x4c0 [ 188.599017] ? _vb2_fop_release+0x3f/0x2b0 [ 188.603337] ? mutex_trylock+0x2b0/0x2b0 [ 188.607419] ? vivid_fop_release+0x66/0x440 [ 188.611825] ? find_held_lock+0x36/0x1c0 [ 188.615912] vid_cap_stop_streaming+0x8d/0xe0 [ 188.620408] ? vid_cap_buf_queue+0x310/0x310 [ 188.624878] __vb2_queue_cancel+0x171/0xca0 [ 188.629217] ? lock_downgrade+0x900/0x900 [ 188.633424] ? __vb2_dqbuf.part.5+0x260/0x260 [ 188.637937] ? find_held_lock+0x36/0x1c0 [ 188.642062] ? mark_held_locks+0xc7/0x130 [ 188.646230] ? kasan_check_write+0x14/0x20 [ 188.650460] ? __mutex_unlock_slowpath+0x197/0x8c0 [ 188.656133] ? kasan_check_read+0x11/0x20 [ 188.660310] ? wait_for_completion+0x8a0/0x8a0 [ 188.664960] ? trace_hardirqs_off_caller+0x310/0x310 [ 188.670086] ? vfs_lock_file+0xe0/0xe0 [ 188.674036] ? vb2_core_poll+0x9b0/0x9b0 [ 188.678119] vb2_core_streamoff+0x60/0x140 [ 188.682430] __vb2_cleanup_fileio+0x73/0x160 [ 188.686871] vb2_core_queue_release+0x1e/0x80 [ 188.691380] _vb2_fop_release+0x1d2/0x2b0 [ 188.695608] vb2_fop_release+0x77/0xc0 [ 188.699513] vivid_fop_release+0x18e/0x440 [ 188.703805] ? vivid_remove+0x460/0x460 [ 188.707804] ? dev_debug_store+0x140/0x140 [ 188.712106] v4l2_release+0xfb/0x1a0 executing program [ 188.715844] __fput+0x385/0xa30 [ 188.719120] ? get_max_files+0x20/0x20 [ 188.723060] ? trace_hardirqs_on+0xbd/0x310 [ 188.727418] ? kasan_check_read+0x11/0x20 [ 188.731568] ? task_work_run+0x1af/0x2a0 [ 188.735689] ? trace_hardirqs_off_caller+0x310/0x310 [ 188.740817] ? filp_close+0x1cd/0x250 [ 188.744742] ____fput+0x15/0x20 [ 188.748043] task_work_run+0x1e8/0x2a0 [ 188.751992] ? task_work_cancel+0x240/0x240 [ 188.756338] ? copy_fd_bitmaps+0x210/0x210 [ 188.760566] ? do_syscall_64+0x9a/0x820 [ 188.764627] exit_to_usermode_loop+0x318/0x380 [ 188.769413] ? __bpf_trace_sys_exit+0x30/0x30 [ 188.773990] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 188.779546] do_syscall_64+0x6be/0x820 [ 188.784153] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 188.789522] ? syscall_return_slowpath+0x5e0/0x5e0 [ 188.794523] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 188.799385] ? trace_hardirqs_on_caller+0x310/0x310 [ 188.804458] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 188.809521] ? prepare_exit_to_usermode+0x291/0x3b0 [ 188.814602] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 188.819497] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 188.824751] RIP: 0033:0x400f00 [ 188.827960] Code: 00 00 00 00 00 00 a8 01 00 00 00 00 00 00 36 01 00 00 b5 00 00 00 01 02 00 00 00 00 00 00 00 00 00 00 6a 01 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 188.846938] RSP: 002b:00007ffda0a741b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 188.854696] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400f00 [ 188.862020] RDX: 00000000000000f6 RSI: 0000000020000240 RDI: 0000000000000003 [ 188.869312] RBP: 0000000000000000 R08: 0000000001522880 R09: 00000000004002e0 [ 188.876643] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000009c83 [ 188.883986] R13: 0000000000401ea0 R14: 0000000000000000 R15: 0000000000000000 [ 188.891303] INFO: task syz-executor721:5736 blocked for more than 140 seconds. [ 188.898726] Not tainted 4.19.0+ #309 [ 188.902997] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 188.911027] syz-executor721 D21848 5736 5717 0x00000004 [ 188.917466] Call Trace: [ 188.920120] __schedule+0x8cf/0x21d0 [ 188.923935] ? __sched_text_start+0x8/0x8 [ 188.928118] ? zap_class+0x640/0x640 [ 188.931960] ? zap_class+0x640/0x640 [ 188.935687] ? print_usage_bug+0xc0/0xc0 [ 188.939758] ? print_usage_bug+0xc0/0xc0 [ 188.943878] ? find_held_lock+0x36/0x1c0 [ 188.947960] ? find_held_lock+0x36/0x1c0 [ 188.952140] ? zap_class+0x640/0x640 [ 188.955869] schedule+0xfe/0x460 [ 188.959229] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 188.964395] ? __schedule+0x21d0/0x21d0 executing program [ 188.968391] ? find_held_lock+0x36/0x1c0 [ 188.974050] ? wait_for_completion+0x41f/0x8a0 [ 188.978700] schedule_timeout+0x1cc/0x260 [ 188.983336] ? usleep_range+0x1a0/0x1a0 [ 188.987528] ? wait_for_completion+0x41f/0x8a0 [ 188.992189] ? trace_hardirqs_off_caller+0x310/0x310 [ 188.997332] wait_for_completion+0x427/0x8a0 [ 189.001800] ? vivid_stop_generating_vid_cap+0x291/0x93b [ 189.007282] ? wait_for_completion_interruptible+0x840/0x840 [ 189.013158] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 189.018713] ? wake_up_q+0x100/0x100 [ 189.022494] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 189.028058] ? rcu_pm_notify+0xc0/0xc0 [ 189.032022] kthread_stop+0x1a9/0x900 [ 189.035841] ? kthread_unpark+0x160/0x160 [ 189.039984] ? lock_acquire+0x1ed/0x520 [ 189.044766] ? _vb2_fop_release+0x3f/0x2b0 [ 189.049010] ? mutex_unlock+0xd/0x10 [ 189.052777] ? v4l2_ctrl_grab+0x115/0x160 [ 189.056952] vivid_stop_generating_vid_cap+0x2bc/0x93b [ 189.062314] ? vivid_start_generating_vid_cap+0x4c0/0x4c0 [ 189.067890] ? _vb2_fop_release+0x3f/0x2b0 [ 189.072184] ? mutex_trylock+0x2b0/0x2b0 [ 189.076268] ? find_held_lock+0x36/0x1c0 [ 189.080332] ? vivid_fop_release+0x66/0x440 [ 189.084736] vid_cap_stop_streaming+0x8d/0xe0 [ 189.089249] ? vid_cap_buf_queue+0x310/0x310 [ 189.093712] __vb2_queue_cancel+0x171/0xca0 [ 189.098052] ? lock_downgrade+0x900/0x900 [ 189.102254] ? __vb2_dqbuf.part.5+0x260/0x260 [ 189.106780] ? find_held_lock+0x36/0x1c0 [ 189.110843] ? mark_held_locks+0xc7/0x130 [ 189.115095] ? kasan_check_write+0x14/0x20 [ 189.119350] ? __mutex_unlock_slowpath+0x197/0x8c0 [ 189.124345] ? kasan_check_read+0x11/0x20 [ 189.128511] ? wait_for_completion+0x8a0/0x8a0 [ 189.133137] ? trace_hardirqs_off_caller+0x310/0x310 [ 189.138282] ? vfs_lock_file+0xe0/0xe0 [ 189.142250] ? vb2_core_poll+0x9b0/0x9b0 [ 189.146338] vb2_core_streamoff+0x60/0x140 [ 189.150567] __vb2_cleanup_fileio+0x73/0x160 [ 189.155024] vb2_core_queue_release+0x1e/0x80 [ 189.159537] _vb2_fop_release+0x1d2/0x2b0 [ 189.163747] vb2_fop_release+0x77/0xc0 executing program [ 189.167652] vivid_fop_release+0x18e/0x440 [ 189.172582] ? vivid_remove+0x460/0x460 [ 189.176561] ? dev_debug_store+0x140/0x140 [ 189.180789] v4l2_release+0xfb/0x1a0 [ 189.184574] __fput+0x385/0xa30 [ 189.187874] ? get_max_files+0x20/0x20 [ 189.191837] ? trace_hardirqs_on+0xbd/0x310 [ 189.196179] ? kasan_check_read+0x11/0x20 [ 189.200976] ? task_work_run+0x1af/0x2a0 [ 189.205094] ? trace_hardirqs_off_caller+0x310/0x310 [ 189.210214] ? filp_close+0x1cd/0x250 [ 189.214066] ____fput+0x15/0x20 [ 189.217364] task_work_run+0x1e8/0x2a0 [ 189.221245] ? task_work_cancel+0x240/0x240 [ 189.225701] ? copy_fd_bitmaps+0x210/0x210 [ 189.229948] ? do_syscall_64+0x9a/0x820 [ 189.233993] exit_to_usermode_loop+0x318/0x380 [ 189.238604] ? __bpf_trace_sys_exit+0x30/0x30 [ 189.243156] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 189.248712] do_syscall_64+0x6be/0x820 [ 189.252645] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 189.258029] ? syscall_return_slowpath+0x5e0/0x5e0 [ 189.263023] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 189.267892] ? trace_hardirqs_on_caller+0x310/0x310 [ 189.272968] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 189.278006] ? prepare_exit_to_usermode+0x291/0x3b0 [ 189.283074] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 189.287956] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 189.293200] RIP: 0033:0x400f00 [ 189.296412] Code: 00 00 00 00 00 00 a8 01 00 00 00 00 00 00 36 01 00 00 b5 00 00 00 01 02 00 00 00 00 00 00 00 00 00 00 6a 01 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 189.316053] RSP: 002b:00007ffda0a741b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 189.323821] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400f00 [ 189.331103] RDX: 00000000000000f6 RSI: 0000000020000240 RDI: 0000000000000003 [ 189.338415] RBP: 0000000000000000 R08: 0000000001522880 R09: 00000000004002e0 [ 189.345752] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000009c92 [ 189.353094] R13: 0000000000401ea0 R14: 0000000000000000 R15: 0000000000000000 [ 189.360386] INFO: task syz-executor721:5814 blocked for more than 140 seconds. executing program [ 189.367785] Not tainted 4.19.0+ #309 [ 189.372078] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 189.380041] syz-executor721 D21936 5814 5716 0x00000004 [ 189.385706] Call Trace: [ 189.388314] __schedule+0x8cf/0x21d0 [ 189.392109] ? __sched_text_start+0x8/0x8 [ 189.396279] ? zap_class+0x640/0x640 [ 189.400010] ? zap_class+0x640/0x640 [ 189.403784] ? zap_class+0x640/0x640 [ 189.407685] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 189.413321] ? check_preemption_disabled+0x48/0x280 [ 189.418388] ? find_held_lock+0x36/0x1c0 [ 189.422515] ? zap_class+0x640/0x640 [ 189.426249] schedule+0xfe/0x460 [ 189.429607] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 189.434751] ? __schedule+0x21d0/0x21d0 [ 189.438748] ? find_held_lock+0x36/0x1c0 [ 189.443536] ? wait_for_completion+0x41f/0x8a0 [ 189.448121] schedule_timeout+0x1cc/0x260 [ 189.452325] ? usleep_range+0x1a0/0x1a0 [ 189.456322] ? wait_for_completion+0x41f/0x8a0 [ 189.460899] ? trace_hardirqs_off_caller+0x310/0x310 [ 189.466130] wait_for_completion+0x427/0x8a0 [ 189.470570] ? vivid_stop_generating_vid_cap+0x291/0x93b [ 189.476071] ? wait_for_completion_interruptible+0x840/0x840 [ 189.481912] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 189.487446] ? wake_up_q+0x100/0x100 [ 189.491154] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 189.496738] ? rcu_pm_notify+0xc0/0xc0 [ 189.500651] kthread_stop+0x1a9/0x900 [ 189.504496] ? kthread_unpark+0x160/0x160 [ 189.508667] ? lock_acquire+0x1ed/0x520 [ 189.512705] ? _vb2_fop_release+0x3f/0x2b0 [ 189.516963] ? mutex_unlock+0xd/0x10 [ 189.520668] ? v4l2_ctrl_grab+0x115/0x160 [ 189.524882] vivid_stop_generating_vid_cap+0x2bc/0x93b [ 189.530181] ? vivid_start_generating_vid_cap+0x4c0/0x4c0 [ 189.535762] ? _vb2_fop_release+0x3f/0x2b0 [ 189.540026] ? mutex_trylock+0x2b0/0x2b0 [ 189.544131] ? vivid_fop_release+0x66/0x440 [ 189.548470] ? find_held_lock+0x36/0x1c0 [ 189.552602] vid_cap_stop_streaming+0x8d/0xe0 [ 189.557106] ? vid_cap_buf_queue+0x310/0x310 [ 189.561502] __vb2_queue_cancel+0x171/0xca0 [ 189.565922] ? lock_downgrade+0x900/0x900 executing program [ 189.570088] ? __vb2_dqbuf.part.5+0x260/0x260 [ 189.575326] ? find_held_lock+0x36/0x1c0 [ 189.579400] ? mark_held_locks+0xc7/0x130 [ 189.583615] ? kasan_check_write+0x14/0x20 [ 189.587869] ? __mutex_unlock_slowpath+0x197/0x8c0 [ 189.592853] ? kasan_check_read+0x11/0x20 [ 189.597010] ? wait_for_completion+0x8a0/0x8a0 [ 189.601581] ? trace_hardirqs_off_caller+0x310/0x310 [ 189.606779] ? vfs_lock_file+0xe0/0xe0 [ 189.610696] ? vb2_core_poll+0x9b0/0x9b0 [ 189.615192] vb2_core_streamoff+0x60/0x140 [ 189.619547] __vb2_cleanup_fileio+0x73/0x160 [ 189.624032] vb2_core_queue_release+0x1e/0x80 [ 189.628562] _vb2_fop_release+0x1d2/0x2b0 [ 189.632782] vb2_fop_release+0x77/0xc0 [ 189.636691] vivid_fop_release+0x18e/0x440 [ 189.640918] ? vivid_remove+0x460/0x460 [ 189.644935] ? dev_debug_store+0x140/0x140 [ 189.649183] v4l2_release+0xfb/0x1a0 [ 189.652947] __fput+0x385/0xa30 [ 189.656246] ? get_max_files+0x20/0x20 [ 189.660125] ? trace_hardirqs_on+0xbd/0x310 [ 189.664505] ? kasan_check_read+0x11/0x20 [ 189.668670] ? task_work_run+0x1af/0x2a0 [ 189.672779] ? trace_hardirqs_off_caller+0x310/0x310 [ 189.677920] ? filp_close+0x1cd/0x250 [ 189.681790] ____fput+0x15/0x20 [ 189.685091] task_work_run+0x1e8/0x2a0 [ 189.688973] ? task_work_cancel+0x240/0x240 [ 189.693354] ? copy_fd_bitmaps+0x210/0x210 [ 189.697604] ? do_syscall_64+0x9a/0x820 [ 189.701572] exit_to_usermode_loop+0x318/0x380 [ 189.706864] ? __bpf_trace_sys_exit+0x30/0x30 [ 189.711368] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 189.716960] do_syscall_64+0x6be/0x820 [ 189.720866] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 189.726287] ? syscall_return_slowpath+0x5e0/0x5e0 [ 189.731244] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 189.736142] ? trace_hardirqs_on_caller+0x310/0x310 [ 189.741191] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 189.746263] ? prepare_exit_to_usermode+0x291/0x3b0 [ 189.751326] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 189.756232] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 189.761437] RIP: 0033:0x400f00 [ 189.764683] Code: 00 00 00 00 00 00 a8 01 00 00 00 00 00 00 36 01 00 00 b5 00 00 00 01 02 00 00 00 00 00 00 00 00 00 00 6a 01 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 189.783636] RSP: 002b:00007ffda0a741b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 189.791356] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400f00 [ 189.798664] RDX: 00000000000000f6 RSI: 0000000020000240 RDI: 0000000000000003 [ 189.805971] RBP: 0000000000000000 R08: 0000000001522880 R09: 00000000004002e0 [ 189.813326] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000009c9d executing program [ 189.820613] R13: 0000000000401ea0 R14: 0000000000000000 R15: 0000000000000000 [ 189.828576] [ 189.828576] Showing all locks held in the system: [ 189.835636] 1 lock held by khungtaskd/1008: [ 189.839948] #0: 000000000871465b (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 [ 189.848800] 3 locks held by rs:main Q:Reg/5593: [ 189.853529] #0: 00000000b01f7387 (&rq->lock){-.-.}, at: pick_next_task_fair+0x1333/0x1b30 [ 189.862018] #1: 000000000871465b (rcu_read_lock){....}, at: __update_idle_core+0xc4/0x600 [ 189.870422] #2: 000000003d5b47f6 (&sb->s_type->i_mutex_key#10){+.+.}, at: ext4_file_write_iter+0x2a1/0x1420 [ 189.880446] 1 lock held by rsyslogd/5595: [ 189.884623] #0: 00000000a569d75c (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 [ 189.892647] 2 locks held by getty/5686: [ 189.896628] #0: 00000000b0cf5dae (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 189.904907] #1: 00000000eecc1c95 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 189.913848] 2 locks held by getty/5687: [ 189.917819] #0: 0000000090745233 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 189.926103] #1: 000000007ba1a6e9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 189.935087] 2 locks held by getty/5688: [ 189.939064] #0: 000000009f9dc78f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 189.947363] #1: 00000000f53fb397 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 189.956270] 2 locks held by getty/5689: [ 189.960247] #0: 0000000098271d65 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 189.969224] #1: 00000000f4365361 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 189.978138] 2 locks held by getty/5690: [ 189.982141] #0: 0000000054e843ad (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 189.990371] #1: 000000002e543ab1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 189.999259] 2 locks held by getty/5691: [ 190.003278] #0: 000000005af3144e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 190.011520] #1: 00000000ad6c1ad2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 executing program [ 190.020581] 2 locks held by getty/5692: [ 190.024612] #0: 00000000d35086c9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 190.032917] #1: 000000001f00489d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 190.041976] [ 190.043609] ============================================= [ 190.043609] [ 190.050607] NMI backtrace for cpu 1 [ 190.054281] CPU: 1 PID: 1008 Comm: khungtaskd Not tainted 4.19.0+ #309 [ 190.060989] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 190.070346] Call Trace: [ 190.072925] dump_stack+0x244/0x39d [ 190.076545] ? dump_stack_print_info.cold.1+0x20/0x20 [ 190.081738] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 190.087274] nmi_cpu_backtrace.cold.1+0x5c/0xa1 [ 190.091944] ? lapic_can_unplug_cpu.cold.26+0x3f/0x3f [ 190.097123] nmi_trigger_cpumask_backtrace+0x1b3/0x1ed [ 190.102399] arch_trigger_cpumask_backtrace+0x14/0x20 [ 190.107579] watchdog+0xb3e/0x1050 [ 190.111132] ? reset_hung_task_detector+0xd0/0xd0 [ 190.115977] ? __kthread_parkme+0xce/0x1a0 [ 190.120204] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 190.125307] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 190.130411] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 190.134984] ? trace_hardirqs_on+0xbd/0x310 [ 190.139321] ? kasan_check_read+0x11/0x20 [ 190.143476] ? __kthread_parkme+0xce/0x1a0 [ 190.147715] ? trace_hardirqs_off_caller+0x310/0x310 [ 190.152830] ? trace_hardirqs_off_caller+0x310/0x310 [ 190.157926] ? lockdep_init_map+0x9/0x10 [ 190.161982] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 190.167083] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 190.172625] ? __kthread_parkme+0xfb/0x1a0 [ 190.176868] ? reset_hung_task_detector+0xd0/0xd0 [ 190.181711] kthread+0x35a/0x440 [ 190.185076] ? kthread_stop+0x900/0x900 [ 190.189040] ret_from_fork+0x3a/0x50 [ 190.192860] Sending NMI from CPU 1 to CPUs 0: [ 190.197446] NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 [ 190.199290] Kernel panic - not syncing: hung_task: blocked tasks [ 190.211139] CPU: 1 PID: 1008 Comm: khungtaskd Not tainted 4.19.0+ #309 [ 190.217790] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 190.227143] Call Trace: [ 190.229742] dump_stack+0x244/0x39d [ 190.233366] ? dump_stack_print_info.cold.1+0x20/0x20 [ 190.238553] panic+0x238/0x4e7 [ 190.241746] ? add_taint.cold.5+0x16/0x16 [ 190.245914] ? nmi_trigger_cpumask_backtrace+0x16a/0x1ed [ 190.251377] ? nmi_trigger_cpumask_backtrace+0x1c4/0x1ed [ 190.256839] ? nmi_trigger_cpumask_backtrace+0x173/0x1ed [ 190.262307] ? nmi_trigger_cpumask_backtrace+0x16a/0x1ed [ 190.267771] watchdog+0xb4f/0x1050 [ 190.271339] ? reset_hung_task_detector+0xd0/0xd0 [ 190.276202] ? __kthread_parkme+0xce/0x1a0 [ 190.280453] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 190.285563] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 190.290673] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 190.295263] ? trace_hardirqs_on+0xbd/0x310 [ 190.299598] ? kasan_check_read+0x11/0x20 [ 190.303752] ? __kthread_parkme+0xce/0x1a0 [ 190.307997] ? trace_hardirqs_off_caller+0x310/0x310 [ 190.313111] ? trace_hardirqs_off_caller+0x310/0x310 [ 190.318220] ? lockdep_init_map+0x9/0x10 [ 190.322295] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 190.327419] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 190.332964] ? __kthread_parkme+0xfb/0x1a0 [ 190.337208] ? reset_hung_task_detector+0xd0/0xd0 [ 190.342058] kthread+0x35a/0x440 [ 190.345431] ? kthread_stop+0x900/0x900 [ 190.349426] ret_from_fork+0x3a/0x50 [ 190.354330] Kernel Offset: disabled [ 190.357962] Rebooting in 86400 seconds..