[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.832180] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.509776] random: sshd: uninitialized urandom read (32 bytes read) [ 23.040455] random: sshd: uninitialized urandom read (32 bytes read) [ 23.749136] random: sshd: uninitialized urandom read (32 bytes read) [ 23.880000] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.53' (ECDSA) to the list of known hosts. [ 29.290991] random: sshd: uninitialized urandom read (32 bytes read) 2018/05/03 14:55:22 parsed 1 programs 2018/05/03 14:55:22 executed programs: 0 [ 29.755632] IPVS: Creating netns size=2536 id=1 [ 29.823832] ------------[ cut here ]------------ [ 29.828646] WARNING: CPU: 0 PID: 3809 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 [ 29.837429] Kernel panic - not syncing: panic_on_warn set ... [ 29.837429] [ 29.845385] CPU: 0 PID: 3809 Comm: syz-executor0 Not tainted 4.9.98-gf679e4d #17 [ 29.852904] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.862534] ffff8801db207cc0 ffffffff81eb0fc9 ffffffff83c484a0 00000000ffffffff [ 29.870597] 0000000000000000 0000000000000000 00000000000000a7 ffff8801db207d80 [ 29.878691] ffffffff8141f975 0000000041b58ab3 ffffffff843b86e8 ffffffff8141f7b6 [ 29.886695] Call Trace: [ 29.889255] [ 29.891386] [] dump_stack+0xc1/0x128 [ 29.896753] [] panic+0x1bf/0x3bc [ 29.901760] [] ? add_taint.cold.6+0x16/0x16 [ 29.907720] [] ? __warn.cold.9+0xa6/0x17f [ 29.913513] [] ? inet_sock_destruct+0x598/0x760 [ 29.919830] [] __warn.cold.9+0xc1/0x17f [ 29.925452] [] warn_slowpath_null+0x2c/0x40 [ 29.931415] [] inet_sock_destruct+0x598/0x760 [ 29.937551] [] ? ipv4_mib_init_net+0x570/0x570 [ 29.943815] [] l2tp_tunnel_destruct+0x339/0x590 [ 29.950124] [] ? l2tp_tunnel_destruct+0x1aa/0x590 [ 29.956611] [] ? l2tp_tunnel_del_work+0x470/0x470 [ 29.963096] [] __sk_destruct+0x55/0x590 [ 29.968710] [] rcu_process_callbacks+0x8ae/0x12b0 [ 29.975183] [] ? rcu_process_callbacks+0x98e/0x12b0 [ 29.981834] [] ? sock_set_timeout+0x210/0x210 [ 29.987965] [] __do_softirq+0x20b/0x937 [ 29.993583] [] irq_exit+0x147/0x190 [ 29.998851] [] smp_apic_timer_interrupt+0x81/0xa0 [ 30.005328] [] apic_timer_interrupt+0xa0/0xb0 [ 30.011453] [ 30.013501] [] ? d_alloc_cursor+0xe0/0xe0 [ 30.019297] [] ? lookup_fast+0x110/0xf50 [ 30.024988] [] ? link_path_walk+0x8a7/0x1200 [ 30.031033] [] ? trailing_symlink+0x780/0x780 [ 30.037162] [] path_openat+0x3a0/0x3590 [ 30.042769] [] ? save_stack+0xa9/0xd0 [ 30.048228] [] ? path_lookupat.isra.41+0x410/0x410 [ 30.054794] [] ? __lock_is_held+0xa2/0xf0 [ 30.060590] [] do_filp_open+0x197/0x270 [ 30.066215] [] ? may_open_dev+0xe0/0xe0 [ 30.071832] [] ? __alloc_fd+0x1d7/0x4a0 [ 30.077462] [] ? _raw_spin_unlock+0x2c/0x50 [ 30.083423] [] ? __alloc_fd+0x1d7/0x4a0 [ 30.089035] [] do_sys_open+0x30d/0x5c0 [ 30.094562] [] ? filp_open+0x70/0x70 [ 30.099916] [] ? SyS_umount+0x196/0x3f0 [ 30.105532] [] ? up_read+0x1a/0x40 [ 30.110716] [] ? __detach_mounts+0x2c0/0x2c0 [ 30.116770] [] compat_SyS_open+0x2a/0x40 [ 30.122473] [] ? compat_SyS_getdents64+0x280/0x280 [ 30.129041] [] do_fast_syscall_32+0x2f7/0x870 [ 30.135171] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.141827] [] entry_SYSENTER_compat+0x90/0xa2 [ 30.148620] Dumping ftrace buffer: [ 30.152222] (ftrace buffer empty) [ 30.155915] Kernel Offset: disabled [ 30.159555] Rebooting in 86400 seconds..