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 '10.128.10.41' (ECDSA) to the list of known hosts. syzkaller login: [ 29.412193] [ 29.413838] ================================================ [ 29.419605] WARNING: lock held when returning to user space! [ 29.425383] 4.16.0+ #18 Not tainted [ 29.428980] ------------------------------------------------ [ 29.434750] syzkaller889258/4485 is leaving the kernel with locks still held! [ 29.442001] 1 lock held by syzkaller889258/4485: [ 29.446737] #0: 000000004e44aba8 (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8d/0x1ec0