[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.818357][ T27] audit: type=1800 audit(1559592467.052:25): pid=8764 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.863472][ T27] audit: type=1800 audit(1559592467.052:26): pid=8764 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.906167][ T27] audit: type=1800 audit(1559592467.062:27): pid=8764 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 '10.128.0.116' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.942971][ T1503] WARNING: CPU: 1 PID: 1503 at drivers/tty/tty_ioctl.c:319 tty_set_termios+0x7a5/0x8d0 [ 67.952715][ T1503] Kernel panic - not syncing: panic_on_warn set ... [ 67.959304][ T1503] CPU: 1 PID: 1503 Comm: kworker/u5:0 Not tainted 5.2.0-rc3 #10 [ 67.966918][ T1503] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.977058][ T1503] Workqueue: hci0 hci_power_on [ 67.981804][ T1503] Call Trace: [ 67.985105][ T1503] dump_stack+0x172/0x1f0 [ 67.989426][ T1503] ? tty_set_termios+0x6e0/0x8d0 [ 67.994375][ T1503] panic+0x2cb/0x744 [ 67.998259][ T1503] ? __warn_printk+0xf3/0xf3 [ 68.002864][ T1503] ? tty_set_termios+0x7a5/0x8d0 [ 68.007822][ T1503] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.014064][ T1503] ? __warn.cold+0x5/0x4d [ 68.018379][ T1503] ? __warn+0xe8/0x1d0 [ 68.022432][ T1503] ? tty_set_termios+0x7a5/0x8d0 [ 68.027379][ T1503] __warn.cold+0x20/0x4d [ 68.031616][ T1503] ? tty_set_termios+0x7a5/0x8d0 [ 68.036542][ T1503] report_bug+0x263/0x2b0 [ 68.040859][ T1503] do_error_trap+0x11b/0x200 [ 68.045459][ T1503] do_invalid_op+0x37/0x50 [ 68.049870][ T1503] ? tty_set_termios+0x7a5/0x8d0 [ 68.054856][ T1503] invalid_op+0x14/0x20 [ 68.058999][ T1503] RIP: 0010:tty_set_termios+0x7a5/0x8d0 [ 68.064528][ T1503] 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 49 fe ff ff e8 eb a4 f9 fd <0f> 0b e9 3e f9 ff ff e8 ef 42 32 fe e9 d6 fa ff ff e8 e5 42 32 fe [ 68.084122][ T1503] RSP: 0018:ffff8880a66d7968 EFLAGS: 00010293 [ 68.090176][ T1503] RAX: ffff8880a66c6640 RBX: ffff8880a66d7a28 RCX: ffffffff8376fafd [ 68.098335][ T1503] RDX: 0000000000000000 RSI: ffffffff837701c5 RDI: 0000000000000005 [ 68.106298][ T1503] RBP: ffff8880a66d7a50 R08: ffff8880a66c6640 R09: fffffbfff163c5f5 [ 68.114259][ T1503] R10: fffffbfff163c5f4 R11: 0000000000000003 R12: ffff8880a66d7a90 [ 68.122266][ T1503] R13: 0000000000010004 R14: 1ffff11014cdaf4c R15: ffff8880a3e20e00 [ 68.130577][ T1503] ? tty_set_termios+0xdd/0x8d0 [ 68.135417][ T1503] ? tty_set_termios+0x7a5/0x8d0 [ 68.140368][ T1503] ? tty_set_termios+0x7a5/0x8d0 [ 68.145311][ T1503] ? hci_dev_do_open+0xa3/0x1760 [ 68.150243][ T1503] ? tty_wait_until_sent+0x580/0x580 [ 68.155521][ T1503] ? __mutex_lock+0x3cd/0x1310 [ 68.160269][ T1503] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.166500][ T1503] ? tty_termios_encode_baud_rate+0x3ca/0x4e0 [ 68.172562][ T1503] hci_uart_set_baudrate+0x157/0x1c0 [ 68.177945][ T1503] ? hci_uart_set_speeds+0x90/0x90 [ 68.183041][ T1503] ? find_first_zero_bit+0x9a/0xc0 [ 68.188143][ T1503] ? kasan_check_read+0x11/0x20 [ 68.192999][ T1503] hci_uart_setup+0xa2/0x490 [ 68.205077][ T1503] ? hci_uart_set_baudrate+0x1c0/0x1c0 [ 68.210529][ T1503] hci_dev_do_open+0x784/0x1760 [ 68.215368][ T1503] ? hci_rx_work+0xaa0/0xaa0 [ 68.219976][ T1503] ? trace_hardirqs_off+0x62/0x220 [ 68.225087][ T1503] ? process_one_work+0x890/0x1790 [ 68.230381][ T1503] ? find_held_lock+0x35/0x130 [ 68.235155][ T1503] ? process_one_work+0x890/0x1790 [ 68.240265][ T1503] hci_power_on+0x10d/0x580 [ 68.244754][ T1503] ? hci_error_reset+0xf0/0xf0 [ 68.249506][ T1503] process_one_work+0x989/0x1790 [ 68.254444][ T1503] ? pwq_dec_nr_in_flight+0x320/0x320 [ 68.259818][ T1503] worker_thread+0x98/0xe40 [ 68.264318][ T1503] kthread+0x354/0x420 [ 68.268373][ T1503] ? process_one_work+0x1790/0x1790 [ 68.273558][ T1503] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 68.279794][ T1503] ret_from_fork+0x24/0x30 [ 68.285427][ T1503] Kernel Offset: disabled [ 68.289818][ T1503] Rebooting in 86400 seconds..