[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.036885] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 14.754417] random: sshd: uninitialized urandom read (32 bytes read) [ 14.959389] random: sshd: uninitialized urandom read (32 bytes read) [ 15.467209] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.11' (ECDSA) to the list of known hosts. [ 21.228797] urandom_read: 1 callbacks suppressed [ 21.228801] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 21.702011] ------------[ cut here ]------------ [ 21.706819] WARNING: CPU: 0 PID: 24 at lib/list_debug.c:33 __list_add+0x143/0x1c0 [ 21.714451] list_add corruption. prev->next should be next (ffff8801b6e31430), but was ffff8801b6e31440. (prev=ffff8801bc648098). [ 21.726266] Kernel panic - not syncing: panic_on_warn set ... [ 21.726266] [ 21.733630] CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.9.124-g09eb2ba #31 [ 21.740902] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.750248] Workqueue: events p9_write_work [ 21.754692] ffff8801d940f9b8 ffffffff81eb95e9 ffffffff83c48ac0 00000000ffffffff [ 21.762729] 0000000000000000 0000000000000000 0000000000000021 ffff8801d940fa78 [ 21.770772] ffffffff81423eb5 0000000041b58ab3 ffffffff843bb8e8 ffffffff81423cf6 [ 21.778839] Call Trace: [ 21.781421] [] dump_stack+0xc1/0x128 [ 21.786774] [] panic+0x1bf/0x3bc [ 21.791778] [] ? add_taint.cold.6+0x16/0x16 [ 21.797746] [] ? __warn.cold.9+0xa6/0x17f [ 21.803533] [] ? __list_add+0x143/0x1c0 [ 21.809135] [] __warn.cold.9+0xc1/0x17f [ 21.814831] [] warn_slowpath_fmt+0xc2/0x100 [ 21.820799] [] ? __warn+0x50/0x50 [ 21.825894] [] ? debug_object_deactivate+0xf7/0x340 [ 21.832588] [] ? p9_write_work+0xd0/0x910 [ 21.838363] [] __list_add+0x143/0x1c0 [ 21.843791] [] p9_write_work+0x1a6/0x910 [ 21.849479] [] process_one_work+0x7e1/0x1500 [ 21.855519] [] ? process_one_work+0x728/0x1500 [ 21.861746] [] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 21.868421] [] worker_thread+0xd6/0x10a0 [ 21.874200] [] ? __schedule+0x655/0x1bd0 [ 21.879889] [] kthread+0x26d/0x300 [ 21.885066] [] ? process_one_work+0x1500/0x1500 [ 21.891395] [] ? kthread_park+0xa0/0xa0 [ 21.897027] [] ? __switch_to_asm+0x34/0x70 [ 21.902910] [] ? kthread_park+0xa0/0xa0 [ 21.908551] [] ? kthread_park+0xa0/0xa0 [ 21.914174] [] ret_from_fork+0x5c/0x70 [ 21.920451] Dumping ftrace buffer: [ 21.924002] (ftrace buffer empty) [ 21.927692] Kernel Offset: disabled [ 21.931311] Rebooting in 86400 seconds..