INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] 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 'ci-upstream-mmots-kasan-gce-0,10.128.15.226' (ECDSA) to the list of known hosts.
net.ipv6.conf.syz0.accept_dad = 0
net.ipv6.conf.syz0.router_solicitations = 0
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
syzkaller login: [   48.111131] 
[   48.112821] =============================
[   48.117177] WARNING: suspicious RCU usage
[   48.121329] 4.13.0-mm1+ #7 Not tainted
[   48.125236] -----------------------------
[   48.129381] ./include/linux/kvm_host.h:481 suspicious rcu_dereference_check() usage!
[   48.137275] 
[   48.137275] other info that might help us debug this:
[   48.137275] 
[   48.145436] 
[   48.145436] rcu_scheduler_active = 2, debug_locks = 1
[   48.152111] no locks held by syzkaller152010/4286.
[   48.157045] 
[   48.157045] stack backtrace:
[   48.161550] CPU: 0 PID: 4286 Comm: syzkaller152010 Not tainted 4.13.0-mm1+ #7
[   48.168799] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.178125] Call Trace:
[   48.180696]  dump_stack+0x194/0x257
[   48.184301]  ? arch_local_irq_restore+0x53/0x53
[   48.188953]  lockdep_rcu_suspicious+0x123/0x170
[   48.193598]  kvm_dev_ioctl+0x877/0x1840
[   48.197552]  ? install_new_memslots+0x420/0x420
[   48.202210]  ? avc_has_extended_perms+0x7fa/0x12c0
[   48.207109]  ? lock_downgrade+0x990/0x990
[   48