[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 39.782496] audit: type=1800 audit(1547340235.159:25): pid=7866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 39.810556] audit: type=1800 audit(1547340235.159:26): pid=7866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 39.830859] audit: type=1800 audit(1547340235.169:27): pid=7866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.203' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.652681] WARNING: CPU: 0 PID: 1171 at drivers/tty/tty_ioctl.c:319 tty_set_termios+0x93a/0xac0 [ 55.661668] Kernel panic - not syncing: panic_on_warn set ... [ 55.667539] CPU: 0 PID: 1171 Comm: kworker/u5:0 Not tainted 5.0.0-rc1+ #22 [ 55.674528] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.683872] Workqueue: hci0 hci_power_on [ 55.687914] Call Trace: [ 55.690604] dump_stack+0x1db/0x2d0 [ 55.694239] ? dump_stack_print_info.cold+0x20/0x20 [ 55.699244] ? tty_set_termios+0x8b0/0xac0 [ 55.703465] panic+0x2cb/0x65c [ 55.706642] ? add_taint.cold+0x16/0x16 [ 55.710600] ? tty_set_termios+0x93a/0xac0 [ 55.714828] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.720445] ? __probe_kernel_read+0x1f4/0x250 [ 55.725018] ? __warn.cold+0x5/0x48 [ 55.728657] ? __warn+0xe8/0x1d0 [ 55.732005] ? tty_set_termios+0x93a/0xac0 [ 55.736248] __warn.cold+0x20/0x48 [ 55.739774] ? tty_set_termios+0x93a/0xac0 [ 55.743997] report_bug+0x263/0x2b0 [ 55.747614] do_error_trap+0x11b/0x200 [ 55.751485] do_invalid_op+0x37/0x50 [ 55.755182] ? tty_set_termios+0x93a/0xac0 [ 55.759400] invalid_op+0x14/0x20 [ 55.762834] RIP: 0010:tty_set_termios+0x93a/0xac0 [ 55.767673] Code: 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 ec 00 00 00 41 89 9f d0 03 00 00 e9 f6 fd ff ff e8 d6 18 a8 fd <0f> 0b e9 a9 f7 ff ff e8 4a 04 ec fd e9 48 f9 ff ff 4c 89 ef e8 9d [ 55.786667] RSP: 0018:ffff8880a756f600 EFLAGS: 00010293 [ 55.792021] RAX: ffff8880a7534300 RBX: ffff8880a756f6c0 RCX: ffffffff83d9d62d [ 55.799271] RDX: 0000000000000000 RSI: ffffffff83d9de8a RDI: 0000000000000005 [ 55.806523] RBP: ffff8880a756f6e8 R08: ffff8880a7534300 R09: fffffbfff181d7b5 [ 55.813777] R10: fffffbfff181d7b4 R11: 0000000000000003 R12: ffff8880a756f728 [ 55.821059] R13: 0000000000010004 R14: 000000000001c200 R15: ffff88808f78a8c0 [ 55.828321] ? tty_set_termios+0xdd/0xac0 [ 55.832453] ? tty_set_termios+0x93a/0xac0 [ 55.836671] ? save_trace+0xe0/0x290 [ 55.840368] ? tty_wait_until_sent+0x5d0/0x5d0 [ 55.844932] ? kasan_check_read+0x11/0x20 [ 55.849068] ? __lock_acquire+0x2514/0x4a30 [ 55.853376] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.858904] ? tty_termios_encode_baud_rate+0x3ca/0x4e0 [ 55.864256] hci_uart_set_baudrate+0x1cc/0x250 [ 55.868822] ? hci_uart_set_speeds+0x90/0x90 [ 55.873218] ? hci_send_monitor_ctrl_event+0x520/0x520 [ 55.878475] ? find_held_lock+0x35/0x120 [ 55.882529] hci_uart_setup+0xa2/0x490 [ 55.886407] ? hci_uart_set_baudrate+0x250/0x250 [ 55.891148] hci_dev_do_open+0x6b1/0x1920 [ 55.895288] ? hci_rx_work+0xcd0/0xcd0 [ 55.899165] ? process_one_work+0xbf1/0x1ce0 [ 55.903559] ? find_held_lock+0x35/0x120 [ 55.907607] ? add_lock_to_list.isra.0+0x450/0x450 [ 55.912518] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.918049] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.923619] ? check_preemption_disabled+0x48/0x290 [ 55.928656] hci_power_on+0x10d/0x880 [ 55.932467] ? hci_error_reset+0xf0/0xf0 [ 55.936522] ? __lock_is_held+0xb6/0x140 [ 55.940577] process_one_work+0xd0c/0x1ce0 [ 55.944800] ? __wake_up_common_lock+0x1db/0x390 [ 55.949548] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 55.954207] ? trace_hardirqs_off+0xb8/0x310 [ 55.958600] ? kasan_check_read+0x11/0x20 [ 55.962730] ? do_raw_spin_unlock+0xa0/0x330 [ 55.967126] ? do_raw_spin_trylock+0x270/0x270 [ 55.971707] ? __wake_up_common+0x7d0/0x7d0 [ 55.976013] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.981580] ? get_work_pool_id+0x1a0/0x1a0 [ 55.985894] ? trace_hardirqs_on_caller+0x310/0x310 [ 55.990904] worker_thread+0x143/0x14a0 [ 55.994868] ? process_one_work+0x1ce0/0x1ce0 [ 55.999448] ? __kthread_parkme+0xc3/0x1b0 [ 56.003669] ? lock_acquire+0x1db/0x570 [ 56.007628] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 56.012732] ? lockdep_hardirqs_on+0x415/0x5d0 [ 56.017345] ? trace_hardirqs_on+0xbd/0x310 [ 56.021654] ? kasan_check_read+0x11/0x20 [ 56.025787] ? __kthread_parkme+0xc3/0x1b0 [ 56.030005] ? trace_hardirqs_off_caller+0x300/0x300 [ 56.035199] ? do_raw_spin_trylock+0x270/0x270 [ 56.039770] ? schedule+0x108/0x350 [ 56.043391] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 56.048483] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 56.054003] ? __kthread_parkme+0xfb/0x1b0 [ 56.058232] kthread+0x357/0x430 [ 56.061588] ? process_one_work+0x1ce0/0x1ce0 [ 56.066062] ? kthread_stop+0x920/0x920 [ 56.070034] ret_from_fork+0x3a/0x50 [ 56.074704] Kernel Offset: disabled [ 56.078366] Rebooting in 86400 seconds..