[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.760996] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.657434] random: sshd: uninitialized urandom read (32 bytes read) [ 20.903679] random: sshd: uninitialized urandom read (32 bytes read) [ 21.549875] random: sshd: uninitialized urandom read (32 bytes read) [ 195.466534] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.51' (ECDSA) to the list of known hosts. [ 200.995509] random: sshd: uninitialized urandom read (32 bytes read) [ 201.079602] IPVS: ftp: loaded support on port[0] = 21 [ 217.192290] ================================================================== [ 217.199721] BUG: KASAN: stack-out-of-bounds in debug_object_deactivate+0x425/0x450 [ 217.207442] Read of size 8 at addr ffff8801bb03e558 by task swapper/1/0 [ 217.214206] [ 217.215826] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.18.0-rc3+ #46 [ 217.222392] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 217.231904] Call Trace: [ 217.234470] [ 217.236617] dump_stack+0x1c9/0x2b4 [ 217.240240] ? dump_stack_print_info.cold.2+0x52/0x52