[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 40.660940][ T26] audit: type=1800 audit(1555590121.196:25): pid=7875 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 40.682801][ T26] audit: type=1800 audit(1555590121.196:26): pid=7875 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 40.712324][ T26] audit: type=1800 audit(1555590121.206:27): pid=7875 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 '10.128.10.5' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.314317][ T1174] WARNING: CPU: 0 PID: 1174 at drivers/tty/tty_ioctl.c:319 tty_set_termios+0x7a9/0x8d0 [ 52.324480][ T1174] Kernel panic - not syncing: panic_on_warn set ... [ 52.331333][ T1174] CPU: 0 PID: 1174 Comm: kworker/u5:0 Not tainted 5.1.0-rc5+ #75 [ 52.339049][ T1174] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.349141][ T1174] Workqueue: hci0 hci_power_on [ 52.353908][ T1174] Call Trace: [ 52.357329][ T1174] dump_stack+0x172/0x1f0 [ 52.361690][ T1174] ? tty_set_termios+0x700/0x8d0 [ 52.366638][ T1174] panic+0x2cb/0x65c [ 52.370553][ T1174] ? __warn_printk+0xf3/0xf3 [ 52.375154][ T1174] ? tty_set_termios+0x7a9/0x8d0 [ 52.380105][ T1174] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.386379][ T1174] ? __warn.cold+0x5/0x45 [ 52.390711][ T1174] ? __warn+0xe8/0x1d0 [ 52.394806][ T1174] ? tty_set_termios+0x7a9/0x8d0 [ 52.399755][ T1174] __warn.cold+0x20/0x45 [ 52.404032][ T1174] ? tty_set_termios+0x7a9/0x8d0 [ 52.408976][ T1174] report_bug+0x263/0x2b0 [ 52.413311][ T1174] do_error_trap+0x11b/0x200 [ 52.417904][ T1174] do_invalid_op+0x37/0x50 [ 52.422340][ T1174] ? tty_set_termios+0x7a9/0x8d0 [ 52.427290][ T1174] invalid_op+0x14/0x20 [ 52.431462][ T1174] RIP: 0010:tty_set_termios+0x7a9/0x8d0 [ 52.437007][ T1174] Code: 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a3 00 00 00 45 89 a7 d0 03 00 00 e9 47 fe ff ff e8 07 7c fd fd <0f> 0b e9 3a f9 ff ff e8 8b 8b 35 fe e9 d2 fa ff ff e8 81 8b 35 fe [ 52.456612][ T1174] RSP: 0018:ffff8880a784f968 EFLAGS: 00010293 [ 52.462704][ T1174] RAX: ffff8880a78423c0 RBX: ffff8880a784fa28 RCX: ffffffff837309dd [ 52.470677][ T1174] RDX: 0000000000000000 RSI: ffffffff837310a9 RDI: 0000000000000005 [ 52.478638][ T1174] RBP: ffff8880a784fa50 R08: ffff8880a78423c0 R09: fffffbfff162a18d [ 52.486609][ T1174] R10: fffffbfff162a18c R11: 0000000000000003 R12: ffff8880a784fa90 [ 52.494577][ T1174] R13: 0000000000010004 R14: 1ffff11014f09f4c R15: ffff8880a5964380 [ 52.502573][ T1174] ? tty_set_termios+0xdd/0x8d0 [ 52.507429][ T1174] ? tty_set_termios+0x7a9/0x8d0 [ 52.512372][ T1174] ? tty_set_termios+0x7a9/0x8d0 [ 52.517321][ T1174] ? hci_dev_do_open+0xa3/0x1780 [ 52.522281][ T1174] ? tty_wait_until_sent+0x580/0x580 [ 52.527572][ T1174] ? __mutex_lock+0x3cd/0x1310 [ 52.532356][ T1174] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.538608][ T1174] ? tty_termios_encode_baud_rate+0x3ca/0x4e0 [ 52.544702][ T1174] hci_uart_set_baudrate+0x157/0x1c0 [ 52.549991][ T1174] ? hci_uart_set_speeds+0x90/0x90 [ 52.555131][ T1174] ? ret_from_fork+0x3a/0x50 [ 52.559734][ T1174] ? kasan_check_write+0x14/0x20 [ 52.564674][ T1174] ? graph_lock+0x7b/0x200 [ 52.569099][ T1174] hci_uart_setup+0xa2/0x490 [ 52.573690][ T1174] ? hci_uart_set_baudrate+0x1c0/0x1c0 [ 52.579155][ T1174] hci_dev_do_open+0x78c/0x1780 [ 52.584009][ T1174] ? hci_rx_work+0xaa0/0xaa0 [ 52.588604][ T1174] ? mark_held_locks+0xf0/0xf0 [ 52.593373][ T1174] hci_power_on+0x10d/0x580 [ 52.597875][ T1174] ? hci_error_reset+0xf0/0xf0 [ 52.602667][ T1174] process_one_work+0x98e/0x1790 [ 52.607619][ T1174] ? pwq_dec_nr_in_flight+0x320/0x320 [ 52.613038][ T1174] worker_thread+0x98/0xe40 [ 52.617563][ T1174] kthread+0x357/0x430 [ 52.621642][ T1174] ? process_one_work+0x1790/0x1790 [ 52.626843][ T1174] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 52.633110][ T1174] ret_from_fork+0x3a/0x50 [ 52.638442][ T1174] Kernel Offset: disabled [ 52.642854][ T1174] Rebooting in 86400 seconds..