[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.221061] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 15.907808] random: sshd: uninitialized urandom read (32 bytes read) [ 16.146364] random: sshd: uninitialized urandom read (32 bytes read) [ 17.080138] random: sshd: uninitialized urandom read (32 bytes read) [ 17.215655] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.25' (ECDSA) to the list of known hosts. [ 22.605673] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/23 23:58:12 parsed 1 programs [ 24.231784] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/23 23:58:14 executed programs: 0 [ 25.072050] IPVS: Creating netns size=2536 id=1 [ 25.268061] ------------[ cut here ]------------ [ 25.272859] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 25.281346] Kernel panic - not syncing: panic_on_warn set ... [ 25.281346] [ 25.288691] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.113-g47bbcd6 #14 [ 25.295689] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.305036] ffff8801db307cc0 ffffffff81eb32a9 ffffffff83c48980 00000000ffffffff [ 25.313068] 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 [ 25.321080] ffffffff81421a55 0000000041b58ab3 ffffffff843bb788 ffffffff81421896 [ 25.329093] Call Trace: [ 25.331651] [ 25.333711] [] dump_stack+0xc1/0x128 [ 25.339075] [] panic+0x1bf/0x3bc [ 25.344074] [] ? add_taint.cold.6+0x16/0x16 [ 25.350019] [] ? __warn.cold.9+0xa6/0x17f [ 25.355800] [] ? inet_sock_destruct+0x598/0x760 [ 25.362102] [] __warn.cold.9+0xc1/0x17f [ 25.367714] [] ? l2tp_tunnel_closeall+0x2af/0x350 [ 25.374187] [] warn_slowpath_null+0x2c/0x40 [ 25.380141] [] inet_sock_destruct+0x598/0x760 [ 25.386265] [] ? ipv4_mib_init_net+0x570/0x570 [ 25.392488] [] l2tp_tunnel_destruct+0x339/0x590 [ 25.398793] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 25.405282] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 25.411787] [] __sk_destruct+0x55/0x590 [ 25.417401] [] rcu_process_callbacks+0x8ae/0x12b0 [ 25.423867] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 25.430509] [] ? sock_set_timeout+0x210/0x210 [ 25.436649] [] __do_softirq+0x20b/0x937 [ 25.442269] [] irq_exit+0x147/0x190 [ 25.447541] [] smp_apic_timer_interrupt+0x81/0xa0 [ 25.454031] [] apic_timer_interrupt+0xa0/0xb0 [ 25.460176] [ 25.462222] [] ? native_safe_halt+0x6/0x10 [ 25.468117] [] ? trace_hardirqs_on+0xd/0x10 [ 25.474070] [] default_idle+0x55/0x360 [ 25.479581] [] arch_cpu_idle+0x10/0x20 [ 25.485096] [] default_idle_call+0x45/0x60 [ 25.490964] [] cpu_startup_entry+0x2b5/0x380 [ 25.496997] [] ? cpu_in_idle+0x20/0x20 [ 25.502527] [] start_secondary+0x328/0x400 [ 25.508401] [] ? set_cpu_sibling_map+0x1300/0x1300 [ 25.515718] Dumping ftrace buffer: [ 25.519279] (ftrace buffer empty) [ 25.522968] Kernel Offset: disabled [ 25.526587] Rebooting in 86400 seconds..