[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.364446] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.796155] random: sshd: uninitialized urandom read (32 bytes read) [ 20.236651] random: sshd: uninitialized urandom read (32 bytes read) [ 21.235645] random: sshd: uninitialized urandom read (32 bytes read) [ 21.368373] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.3' (ECDSA) to the list of known hosts. [ 26.838426] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/13 12:38:41 parsed 1 programs [ 28.429805] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/13 12:38:44 executed programs: 0 [ 29.731742] IPVS: Creating netns size=2536 id=1 [ 29.833868] ------------[ cut here ]------------ [ 29.838676] WARNING: CPU: 0 PID: 3845 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 29.847511] Kernel panic - not syncing: panic_on_warn set ... [ 29.847511] [ 29.854864] CPU: 0 PID: 3845 Comm: syz-executor0 Not tainted 4.9.112-g9e79039 #11 [ 29.862458] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.871790] ffff8801db207cc0 ffffffff81eb3249 ffffffff83c48980 00000000ffffffff [ 29.879777] 0000000000000000 0000000000000000 00000000000000a7 ffff8801db207d80 [ 29.887763] ffffffff81421a55 0000000041b58ab3 ffffffff843bae78 ffffffff81421896 [ 29.895743] Call Trace: [ 29.898294] [ 29.900332] [] dump_stack+0xc1/0x128 [ 29.905685] [] panic+0x1bf/0x3bc [ 29.910674] [] ? add_taint.cold.6+0x16/0x16 [ 29.916617] [] ? __warn.cold.9+0xa6/0x17f [ 29.922396] [] ? inet_sock_destruct+0x598/0x760 [ 29.928686] [] __warn.cold.9+0xc1/0x17f [ 29.934285] [] warn_slowpath_null+0x2c/0x40 [ 29.940228] [] inet_sock_destruct+0x598/0x760 [ 29.946353] [] ? ipv4_mib_init_net+0x570/0x570 [ 29.952555] [] l2tp_tunnel_destruct+0x339/0x590 [ 29.959037] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 29.965502] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 29.971972] [] __sk_destruct+0x55/0x590 [ 29.977568] [] rcu_process_callbacks+0x8ae/0x12b0 [ 29.984031] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 29.990667] [] ? sock_set_timeout+0x210/0x210 [ 29.996785] [] __do_softirq+0x20b/0x937 [ 30.002383] [] irq_exit+0x147/0x190 [ 30.007632] [] smp_apic_timer_interrupt+0x81/0xa0 [ 30.014095] [] apic_timer_interrupt+0xa0/0xb0 [ 30.020210] [ 30.022248] [] ? _raw_write_unlock_irq+0x2e/0x50 [ 30.028644] [] SyS_setpgid+0x1d8/0x6c0 [ 30.034153] [] ? SyS_setpgid+0x76/0x6c0 [ 30.039752] [] ? SyS_times+0x140/0x140 [ 30.045267] [] do_fast_syscall_32+0x2f7/0x870 [ 30.051383] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.058029] [] entry_SYSENTER_compat+0x90/0xa2 [ 30.064763] Dumping ftrace buffer: [ 30.068316] (ftrace buffer empty) [ 30.071995] Kernel Offset: disabled [ 30.075599] Rebooting in 86400 seconds..