[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.249545] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.497754] random: sshd: uninitialized urandom read (32 bytes read) [ 16.959049] random: sshd: uninitialized urandom read (32 bytes read) [ 17.690775] random: sshd: uninitialized urandom read (32 bytes read) [ 17.840061] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.26' (ECDSA) to the list of known hosts. [ 23.204989] random: sshd: uninitialized urandom read (32 bytes read) 2018/04/27 00:41:57 parsed 1 programs 2018/04/27 00:41:57 executed programs: 0 [ 23.588480] IPVS: Creating netns size=2536 id=1 [ 23.650060] ------------[ cut here ]------------ [ 23.654835] WARNING: CPU: 1 PID: 3824 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 23.663578] Kernel panic - not syncing: panic_on_warn set ... [ 23.663578] [ 23.670915] CPU: 1 PID: 3824 Comm: blkid Not tainted 4.9.96-g71fce1e #13 [ 23.677812] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.687442] ffff8801db307cc0 ffffffff81eb0b69 ffffffff83a484a0 00000000ffffffff [ 23.695442] 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 [ 23.703424] ffffffff8141f975 0000000041b58ab3 ffffffff841b8030 ffffffff8141f7b6 [ 23.711414] Call Trace: [ 23.713977] [ 23.716015] [] dump_stack+0xc1/0x128 [ 23.721369] [] panic+0x1bf/0x3bc [ 23.726357] [] ? add_taint.cold.6+0x16/0x16 [ 23.732309] [] ? __warn.cold.9+0xa6/0x17f [ 23.738088] [] ? inet_sock_destruct+0x598/0x760 [ 23.744386] [] __warn.cold.9+0xc1/0x17f [ 23.749982] [] warn_slowpath_null+0x2c/0x40 [ 23.755925] [] inet_sock_destruct+0x598/0x760 [ 23.762039] [] ? ipv4_mib_init_net+0x570/0x570 [ 23.768249] [] l2tp_tunnel_destruct+0x339/0x590 [ 23.774538] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 23.781004] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 23.787465] [] __sk_destruct+0x55/0x590 [ 23.793072] [] rcu_process_callbacks+0x8ae/0x12b0 [ 23.799620] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 23.806256] [] ? sock_set_timeout+0x210/0x210 [ 23.812379] [] __do_softirq+0x20b/0x937 [ 23.817973] [] irq_exit+0x147/0x190 [ 23.823236] [] smp_apic_timer_interrupt+0x81/0xa0 [ 23.829698] [] apic_timer_interrupt+0xa0/0xb0 [ 23.835808] [ 23.838354] Dumping ftrace buffer: [ 23.841929] (ftrace buffer empty) [ 23.845613] Kernel Offset: disabled [ 23.849220] Rebooting in 86400 seconds..