[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   55.221572][   T27] audit: type=1800 audit(1581780558.190:25): pid=8522 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[   55.247396][   T27] audit: type=1800 audit(1581780558.190:26): pid=8522 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[   55.292598][   T27] audit: type=1800 audit(1581780558.200:27): pid=8522 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.1.59' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   66.650629][ T8673] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: vhost_net_ioctl+0x1d83/0x1db0
[   66.662978][ T8673] CPU: 0 PID: 8673 Comm: syz-executor239 Not tainted 5.6.0-rc1-syzkaller #0
[   66.672649][ T8673] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   66.682861][ T8673] Call Trace:
[   66.686182][ T8673]  dump_stack+0x1fb/0x318
[   66.690511][ T8673]  panic+0x264/0x7a9
[   66.694418][ T8673]  ? vhost_net_ioctl+0x1d83/0x1db0
[   66.699530][ T8673]  ? __mutex_unlock_slowpath+0x13b/0x5b0
[   66.705170][ T8673]  ? vhost_net_ioctl+0x1d83/0x1db0
[   66.710279][ T8673]  __stack_chk_fail+0x1f/0x20
[   66.714997][ T8673]  vhost_net_ioctl+0x1d83/0x1db0
[   66.719947][ T8673]  __se_sys_ioctl+0x113/0x190
[   66.724622][ T8673]  __x64_sys_ioctl+0x7b/0x90
[   66.729237][ T8673]  do_syscall_64+0xf7/0x1c0
[   66.733744][ T8673]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   66.739628][ T8673] RIP: 0033:0x440259
[   66.743501][ T8673] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
[   66.763230][ T8673] RSP: 002b:00007ffdeb5890b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   66.772018][ T8673] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440259
[   66.780521][ T8673] RDX: 0000000020f1dff8 RSI: 000000004008af30 RDI: 0000000000000003
[   66.788491][ T8673] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
[   66.796476][ T8673] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401ae0
[   66.804483][ T8673] R13: 0000000000401b70 R14: 0000000000000000 R15: 0000000000000000
[   66.814166][ T8673] Kernel Offset: disabled
[   66.818553][ T8673] Rebooting in 86400 seconds..