[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   13.868671] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?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..