[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.868671] 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: [ 16.016124] random: sshd: uninitialized urandom read (32 bytes read) [ 16.455382] random: sshd: uninitialized urandom read (32 bytes read) [ 17.308829] random: sshd: uninitialized urandom read (32 bytes read) [ 17.452643] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.14' (ECDSA) to the list of known hosts. [ 22.928506] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program [ 23.092701] ------------[ cut here ]------------ [ 23.097495] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 23.105988] Kernel panic - not syncing: panic_on_warn set ... [ 23.105988] [ 23.113342] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.102-g2e35bed #36 [ 23.120336] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.129674] ffff8801db307cc0 ffffffff81eb3489 ffffffff83c48b40 00000000ffffffff [ 23.137707] 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 [ 23.145729] ffffffff81421aa5 0000000041b58ab3 ffffffff843b94b0 ffffffff814218e6 [ 23.153759] Call Trace: [ 23.156324] <IRQ> [ 23.158378] [<ffffffff81eb3489>] dump_stack+0xc1/0x128 [ 23.163759] [<ffffffff81421aa5>] panic+0x1bf/0x3bc [ 23.168748] [<ffffffff814218e6>] ? add_taint.cold.6+0x16/0x16 [ 23.174693] [<ffffffff81421d76>] ? __warn.cold.9+0xa6/0x17f [ 23.180461] [<ffffffff83423048>] ? inet_sock_destruct+0x598/0x760 [ 23.186749] [<ffffffff81421d91>] __warn.cold.9+0xc1/0x17f [ 23.192343] [<ffffffff8113665c>] warn_slowpath_null+0x2c/0x40 [ 23.198283] [<ffffffff83423048>] inet_sock_destruct+0x598/0x760 [ 23.204399] [<ffffffff83422ab0>] ? ipv4_mib_init_net+0x570/0x570 [ 23.210600] [<ffffffff836bb9b9>] l2tp_tunnel_destruct+0x339/0x590 [ 23.216890] [<ffffffff836bb82a>] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 23.223353] [<ffffffff836bb680>] ? l2tp_tunnel_del_work+0x470/0x470 [ 23.229815] [<ffffffff83020095>] __sk_destruct+0x55/0x590 [ 23.235410] [<ffffffff812878de>] rcu_process_callbacks+0x8ae/0x12b0 [ 23.241871] [<ffffffff812879be>] ? rcu_process_callbacks+0x98e/0x12b0 [ 23.248506] [<ffffffff83020040>] ? sock_set_timeout+0x210/0x210 [ 23.254623] [<ffffffff839fe4bb>] __do_softirq+0x20b/0x937 [ 23.260218] [<ffffffff8114b0b7>] irq_exit+0x147/0x190 [ 23.265476] [<ffffffff839fd0a1>] smp_apic_timer_interrupt+0x81/0xa0 [ 23.271936] [<ffffffff839f9230>] apic_timer_interrupt+0xa0/0xb0 [ 23.278046] <EOI> [ 23.280085] [<ffffffff839f64f6>] ? native_safe_halt+0x6/0x10 [ 23.285959] [<ffffffff81235f6d>] ? trace_hardirqs_on+0xd/0x10 [ 23.291900] [<ffffffff839f5b35>] default_idle+0x55/0x360 [ 23.297410] [<ffffffff8106ab20>] arch_cpu_idle+0x10/0x20 [ 23.302917] [<ffffffff839f6955>] default_idle_call+0x45/0x60 [ 23.308773] [<ffffffff81222fb5>] cpu_startup_entry+0x2b5/0x380 [ 23.314800] [<ffffffff81222d00>] ? cpu_in_idle+0x20/0x20 [ 23.320316] [<ffffffff810ae9e8>] start_secondary+0x328/0x400 [ 23.326181] [<ffffffff810ae6c0>] ? set_cpu_sibling_map+0x1300/0x1300 [ 23.333362] Dumping ftrace buffer: [ 23.336913] (ftrace buffer empty) [ 23.340593] Kernel Offset: disabled [ 23.344201] Rebooting in 86400 seconds..