[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.796758] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.609871] random: sshd: uninitialized urandom read (32 bytes read) [ 16.848329] random: sshd: uninitialized urandom read (32 bytes read) [ 17.777594] random: sshd: uninitialized urandom read (32 bytes read) [ 17.906234] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.61' (ECDSA) to the list of known hosts. [ 23.265300] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/23 08:51:40 parsed 1 programs [ 24.884327] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/23 08:51:42 executed programs: 0 [ 25.728015] IPVS: Creating netns size=2536 id=1 [ 25.911976] ------------[ cut here ]------------ [ 25.916793] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 25.925306] Kernel panic - not syncing: panic_on_warn set ... [ 25.925306] [ 25.932658] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.113-g47bbcd6 #14 [ 25.939649] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.948981] ffff8801db307cc0 ffffffff81eb32a9 ffffffff83c48980 00000000ffffffff [ 25.957009] 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 [ 25.965038] ffffffff81421a55 0000000041b58ab3 ffffffff843bb788 ffffffff81421896 [ 25.973056] Call Trace: [ 25.975616] [ 25.977676] [] dump_stack+0xc1/0x128 [ 25.983069] [] panic+0x1bf/0x3bc [ 25.988064] [] ? add_taint.cold.6+0x16/0x16 [ 25.994011] [] ? __warn.cold.9+0xa6/0x17f [ 25.999804] [] ? inet_sock_destruct+0x598/0x760 [ 26.006110] [] __warn.cold.9+0xc1/0x17f [ 26.011740] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 26.018216] [] warn_slowpath_null+0x2c/0x40 [ 26.024185] [] inet_sock_destruct+0x598/0x760 [ 26.030308] [] ? ipv4_mib_init_net+0x570/0x570 [ 26.036528] [] l2tp_tunnel_destruct+0x339/0x590 [ 26.042825] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 26.049651] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 26.056131] [] __sk_destruct+0x55/0x590 [ 26.061749] [] rcu_process_callbacks+0x8ae/0x12b0 [ 26.068236] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 26.074902] [] ? sock_set_timeout+0x210/0x210 [ 26.081038] [] __do_softirq+0x20b/0x937 [ 26.087512] [] irq_exit+0x147/0x190 [ 26.092781] [] smp_apic_timer_interrupt+0x81/0xa0 [ 26.099257] [] apic_timer_interrupt+0xa0/0xb0 [ 26.105382] [ 26.107422] [] ? native_safe_halt+0x6/0x10 [ 26.113301] [] ? trace_hardirqs_on+0xd/0x10 [ 26.119253] [] default_idle+0x55/0x360 [ 26.124767] [] arch_cpu_idle+0x10/0x20 [ 26.130302] [] default_idle_call+0x45/0x60 [ 26.136164] [] cpu_startup_entry+0x2b5/0x380 [ 26.142216] [] ? cpu_in_idle+0x20/0x20 [ 26.147733] [] start_secondary+0x328/0x400 [ 26.153604] [] ? set_cpu_sibling_map+0x1300/0x1300 [ 26.160793] Dumping ftrace buffer: [ 26.164362] (ftrace buffer empty) [ 26.168060] Kernel Offset: disabled [ 26.171679] Rebooting in 86400 seconds..