[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.765400] 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: [ 17.431654] random: sshd: uninitialized urandom read (32 bytes read) [ 17.801849] random: sshd: uninitialized urandom read (32 bytes read) [ 18.639371] random: sshd: uninitialized urandom read (32 bytes read) [ 18.771276] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.48' (ECDSA) to the list of known hosts. [ 24.368708] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/14 08:26:39 parsed 1 programs [ 26.148055] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/14 08:26:41 executed programs: 0 [ 27.129737] IPVS: Creating netns size=2536 id=1 [ 27.304043] ------------[ cut here ]------------ [ 27.308886] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 27.317396] Kernel panic - not syncing: panic_on_warn set ... [ 27.317396] [ 27.324749] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.112-g9e79039 #11 [ 27.331758] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.341102] ffff8801db307cc0 ffffffff81eb3249 ffffffff83c48980 00000000ffffffff [ 27.349115] 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 [ 27.357120] ffffffff81421a55 0000000041b58ab3 ffffffff843bae78 ffffffff81421896 [ 27.365132] Call Trace: [ 27.367690] <IRQ> [ 27.369745] [<ffffffff81eb3249>] dump_stack+0xc1/0x128 [ 27.375132] [<ffffffff81421a55>] panic+0x1bf/0x3bc [ 27.380127] [<ffffffff81421896>] ? add_taint.cold.6+0x16/0x16 [ 27.386078] [<ffffffff81421d26>] ? __warn.cold.9+0xa6/0x17f [ 27.391871] [<ffffffff83424cc8>] ? inet_sock_destruct+0x598/0x760 [ 27.398176] [<ffffffff81421d41>] __warn.cold.9+0xc1/0x17f [ 27.403792] [<ffffffff836bd59f>] ? l2tp_tunnel_closeall+0x2af/0x350 [ 27.410273] [<ffffffff8113683c>] warn_slowpath_null+0x2c/0x40 [ 27.416250] [<ffffffff83424cc8>] inet_sock_destruct+0x598/0x760 [ 27.422398] [<ffffffff83424730>] ? ipv4_mib_init_net+0x570/0x570 [ 27.428623] [<ffffffff836bdde9>] l2tp_tunnel_destruct+0x339/0x590 [ 27.434934] [<ffffffff836bdc5a>] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 27.441419] [<ffffffff836bdab0>] ? l2tp_tunnel_del_work+0x470/0x470 [ 27.447896] [<ffffffff83021095>] __sk_destruct+0x55/0x590 [ 27.453510] [<ffffffff812877ce>] rcu_process_callbacks+0x8ae/0x12b0 [ 27.459992] [<ffffffff812878ae>] ? rcu_process_callbacks+0x98e/0x12b0 [ 27.466662] [<ffffffff83021040>] ? sock_set_timeout+0x210/0x210 [ 27.472807] [<ffffffff83a00b3b>] __do_softirq+0x20b/0x937 [ 27.478432] [<ffffffff8114b297>] irq_exit+0x147/0x190 [ 27.483713] [<ffffffff839ff721>] smp_apic_timer_interrupt+0x81/0xa0 [ 27.490194] [<ffffffff839fb8b0>] apic_timer_interrupt+0xa0/0xb0 [ 27.496315] <EOI> [ 27.498378] [<ffffffff839f8b86>] ? native_safe_halt+0x6/0x10 [ 27.504270] [<ffffffff81235c6d>] ? trace_hardirqs_on+0xd/0x10 [ 27.510232] [<ffffffff839f81c5>] default_idle+0x55/0x360 [ 27.516198] [<ffffffff8106ae00>] arch_cpu_idle+0x10/0x20 [ 27.521726] [<ffffffff839f8fe5>] default_idle_call+0x45/0x60 [ 27.527592] [<ffffffff812231f5>] cpu_startup_entry+0x2b5/0x380 [ 27.533633] [<ffffffff81222f40>] ? cpu_in_idle+0x20/0x20 [ 27.539154] [<ffffffff810aefa8>] start_secondary+0x328/0x400 [ 27.545024] [<ffffffff810aec80>] ? set_cpu_sibling_map+0x1300/0x1300 [ 27.552207] Dumping ftrace buffer: [ 27.555880] (ftrace buffer empty) [ 27.560105] Kernel Offset: disabled [ 27.563743] Rebooting in 86400 seconds..