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 syzkaller login: [ 21.623190] sshd (4439) used greatest stack depth: 16424 bytes left Warning: Permanently added '10.128.0.37' (ECDSA) to the list of known hosts. [ 28.368732] [ 28.370375] ================================================ [ 28.376143] WARNING: lock held when returning to user space! [ 28.381911] 4.16.0+ #3 Not tainted [ 28.385419] ------------------------------------------------ [ 28.391188] syzkaller749245/4455 is leaving the kernel with locks still held! [ 28.398434] 1 lock held by syzkaller749245/4455: [ 28.403156] #0: 00000000bbe08678 (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8d/0x1ec0