[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.15.206' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   41.335754] audit: type=1400 audit(1591804825.307:8): avc:  denied  { execmem } for  pid=6341 comm="syz-executor023" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[   41.411521] kasan: CONFIG_KASAN_INLINE enabled
[   41.411532] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   41.411542] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   41.411545] Modules linked in:
[   41.411554] CPU: 1 PID: 6341 Comm: syz-executor023 Not tainted 4.14.183-syzkaller #0
[   41.411558] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   41.411563] task: ffff888097c02200 task.stack: ffff888082560000
[   41.411582] RIP: 0010:do_con_write.part.0+0x78e/0x1a20
[   41.411586] RSP: 0018:ffff8880825678d0 EFLAGS: 00010203
[   41.411591] RAX: 0000000020000001 RBX: 000000010000000e RCX: 0000000000000002
[   41.411595] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888097f626bd
[   41.411599] RBP: 000000000000075e R08: 0000000000000001 R09: 0000000000000000
[   41.411603] R10: ffff888097c02b28 R11: ffff888097c02200 R12: dffffc0000000000
[   41.411607] R13: ffff888097f626cc R14: ffff888097f62340 R15: ffff888082567a49
[   41.411613] FS:  00000000017dc880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
[   41.411617] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   41.411621] CR2: 0000000020000180 CR3: 000000008a714000 CR4: 00000000001406e0
[   41.411629] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   41.411633] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   41.411634] Call Trace:
[   41.411650]  ? do_con_trol+0x52e0/0x52e0
[   41.411659]  ? n_tty_receive_buf_common+0x902/0x2490
[   41.411667]  ? __mutex_lock+0x2cb/0x1430
[   41.411673]  ? do_con_write.part.0+0x1a20/0x1a20
[   41.411679]  con_put_char+0xb4/0xc0
[   41.411687]  ? do_con_write.part.0+0x1a20/0x1a20
[   41.411694]  ? __ww_mutex_wakeup_for_backoff+0x210/0x210
[   41.411701]  tty_put_char+0xa3/0x120
[   41.411708]  ? dev_match_devt+0x80/0x80
[   41.411715]  ? n_tty_receive_signal_char+0x7e/0xf0
[   41.411720]  ? con_write_room+0x48/0x60
[   41.411726]  ? vt_console_device+0xa0/0xa0
[   41.411734]  __process_echoes+0x489/0x8c0
[   41.411744]  n_tty_receive_buf_common+0x940/0x2490
[   41.411758]  ? n_tty_receive_buf2+0x40/0x40
[   41.411765]  tty_ioctl+0xd5f/0x1220
[   41.411772]  ? tty_vhangup+0x30/0x30
[   41.411779]  ? lock_acquire+0x170/0x3f0
[   41.411786]  ? lock_downgrade+0x6a0/0x6e0
[   41.411804]  ? tty_vhangup+0x30/0x30
[   41.411814]  do_vfs_ioctl+0x75a/0xfe0
[   41.411825]  ? selinux_parse_skb.constprop.0+0x16c0/0x16c0
[   41.411833]  ? ioctl_preallocate+0x1a0/0x1a0
[   41.411839]  ? rcu_read_lock_sched_held+0x10a/0x130
[   41.411846]  ? kmem_cache_free+0x23a/0x2b0
[   41.411852]  ? putname+0xcd/0x110
[   41.411862]  ? security_file_ioctl+0x76/0xb0
[   41.411867]  ? security_file_ioctl+0x83/0xb0
[   41.411873]  SyS_ioctl+0x7f/0xb0
[   41.411879]  ? do_vfs_ioctl+0xfe0/0xfe0
[   41.411887]  do_syscall_64+0x1d5/0x640
[   41.411896]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   41.411900] RIP: 0033:0x440549
[   41.411903] RSP: 002b:00007fffb7cba628 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   41.411909] RAX: ffffffffffffffda RBX: 00007fffb7cba630 RCX: 0000000000440549
[   41.411912] RDX: 00000000200000c0 RSI: 0000000000005412 RDI: 0000000000000004
[   41.411915] RBP: 00000000006cb018 R08: 000000000000000e R09: 6c616b7a79732f2e
[   41.411918] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401dd0
[   41.411921] R13: 0000000000401e60 R14: 0000000000000000 R15: 0000000000000000
[   41.411927] Code: 24 b2 00 00 00 66 03 6c 24 38 e8 ce b6 1a fe 48 8b 44 24 78 80 38 00 0f 85 d2 10 00 00 49 8b 9e a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 20 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 
[   41.412036] RIP: do_con_write.part.0+0x78e/0x1a20 RSP: ffff8880825678d0
[   41.412043] ---[ end trace 6d72582ba29c448e ]---
[   41.412046] Kernel panic - not syncing: Fatal exception
[   41.413958] Kernel Offset: disabled
[   41.776044] Rebooting in 86400 seconds..