[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.843542] 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: [ 24.115966] random: sshd: uninitialized urandom read (32 bytes read) [ 24.645517] random: sshd: uninitialized urandom read (32 bytes read) [ 25.172471] random: sshd: uninitialized urandom read (32 bytes read) [ 25.288579] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. [ 30.712482] random: sshd: uninitialized urandom read (32 bytes read) 2018/05/08 12:43:51 parsed 1 programs 2018/05/08 12:43:51 executed programs: 0 [ 31.126486] IPVS: Creating netns size=2536 id=1 [ 31.158403] IPVS: Creating netns size=2536 id=2 [ 31.184672] IPVS: Creating netns size=2536 id=3 [ 31.211255] IPVS: Creating netns size=2536 id=4 [ 31.368423] kasan: CONFIG_KASAN_INLINE enabled [ 31.373033] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 31.381606] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 31.387834] Dumping ftrace buffer: [ 31.391350] (ftrace buffer empty) [ 31.395034] Modules linked in: [ 31.398317] CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted 4.9.98-ga03d0bb #21 [ 31.405473] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.414811] Workqueue: netns cleanup_net [ 31.418977] task: ffff8801d9a38000 task.stack: ffff8801d9a40000 [ 31.425003] RIP: 0010:[] [] addrconf_rt_table+0x127/0x290 [ 31.433852] RSP: 0018:ffff8801d9a47520 EFLAGS: 00010206 [ 31.439278] RAX: dffffc0000000000 RBX: 0000000000000200 RCX: ffff8801d9a38000 [ 31.446521] RDX: 0000000000000056 RSI: 0000000000000004 RDI: 00000000000002b0 [ 31.453762] RBP: ffff8801d9a47550 R08: ffff8801d9a38988 R09: 0000000000000001 [ 31.461001] R10: 0000000000000000 R11: 1ffff1003b34712c R12: 0000000000000000 [ 31.468242] R13: 00000000000000fe R14: ffff8801d4188000 R15: ffff8801c9dc2b90 [ 31.475574] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 31.483770] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.489623] CR2: 0000000002261d68 CR3: 00000001bafd1000 CR4: 00000000001606f0 [ 31.496866] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.504164] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.511404] Stack: [ 31.513527] ffffffff83577d70 ffff8801d4188000 0000000000000000 ffff8801b72b8000 [ 31.521508] ffff8801bd6f6d00 ffff8801c9dc2b90 ffff8801d9a47598 ffffffff83578783 [ 31.529489] 0000000000000000 ffff880100000080 ffff8801c9dc2a00 ffff8801c9dc2b90 [ 31.537468] Call Trace: [ 31.540030] [] ? addrconf_leave_solict+0x90/0x90 [ 31.546407] [] addrconf_get_prefix_route+0x33/0x270 [ 31.553043] [] __ipv6_ifa_notify+0x5d8/0x790 [ 31.559071] [] addrconf_ifdown+0x94f/0x10e0 [ 31.565014] [] ? add_addr+0x180/0x180 [ 31.570438] [] ? __lock_is_held+0xa2/0xf0 [ 31.576208] [] addrconf_notify+0x7f8/0x2160 [ 31.582151] [] ? inet6_ifinfo_notify+0x140/0x140 [ 31.588530] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 31.594823] [] ? ip_vs_dst_event+0x24c/0x650 [ 31.600853] [] ? ip6mr_device_event+0x165/0x1c0 [ 31.607147] [] notifier_call_chain+0xb4/0x1d0 [ 31.613265] [] raw_notifier_call_chain+0x2d/0x40 [ 31.619645] [] call_netdevice_notifiers_info+0x55/0x70 [ 31.626545] [] rollback_registered_many+0x5a4/0x920 [ 31.633184] [] ? free_netdev+0x300/0x300 [ 31.638867] [] ? mark_held_locks+0xc7/0x130 [ 31.644809] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 31.651620] [] unregister_netdevice_many.part.106+0x1b/0x110 [ 31.659602] [] default_device_exit_batch+0x353/0x410 [ 31.666332] [] ? unregister_netdevice_many+0x50/0x50 [ 31.673056] [] ? rtnl_unlock+0xe/0x10 [ 31.678479] [] ? default_device_exit+0x1c4/0x260 [ 31.684864] [] ? finish_wait+0x180/0x180 [ 31.690550] [] ? cfg80211_switch_netns+0x490/0x490 [ 31.697103] [] ? unregister_netdevice_many+0x50/0x50 [ 31.703825] [] ? dev_change_net_namespace+0xb30/0xb30 [ 31.710635] [] ops_exit_list.isra.6+0x105/0x160 [ 31.716924] [] cleanup_net+0x321/0x630 [ 31.722430] [] ? net_drop_ns+0x80/0x80 [ 31.727940] [] ? __lock_is_held+0xa2/0xf0 [ 31.733709] [] process_one_work+0x7e1/0x1500 [ 31.739740] [] ? process_one_work+0x728/0x1500 [ 31.745942] [] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 31.752409] [] worker_thread+0xd6/0x10a0 [ 31.758092] [] kthread+0x26d/0x300 [ 31.763253] [] ? process_one_work+0x1500/0x1500 [ 31.769542] [] ? kthread_park+0xa0/0xa0 [ 31.775138] [] ? kthread_park+0xa0/0xa0 [ 31.780751] [] ? kthread_park+0xa0/0xa0 [ 31.786363] [] ret_from_fork+0x5c/0x70 [ 31.791873] Code: 83 be 01 00 00 00 48 c7 c7 20 ef 6d 84 e8 92 12 cc fd 49 8d bc 24 b0 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 34 01 00 00 45 8b bc 24 b0 [ 31.818749] RIP [] addrconf_rt_table+0x127/0x290 [ 31.825255] RSP [ 31.829011] ---[ end trace a034dbc8c2937588 ]--- [ 31.833746] Kernel panic - not syncing: Fatal exception [ 31.839492] Dumping ftrace buffer: [ 31.843006] (ftrace buffer empty) [ 31.846689] Kernel Offset: disabled [ 31.850290] Rebooting in 86400 seconds..