[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.053982] 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: [ 17.836363] random: sshd: uninitialized urandom read (32 bytes read) [ 18.192446] random: sshd: uninitialized urandom read (32 bytes read) [ 18.968498] random: sshd: uninitialized urandom read (32 bytes read) [ 19.097262] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.50' (ECDSA) to the list of known hosts. [ 24.553862] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program [ 24.655027] IPVS: Creating netns size=2536 id=1 [ 24.669114] IPVS: Creating netns size=2536 id=2 [ 24.684221] IPVS: Creating netns size=2536 id=3 [ 24.699353] IPVS: Creating netns size=2536 id=4 [ 24.954324] kasan: CONFIG_KASAN_INLINE enabled [ 24.958962] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.966507] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 24.972727] Dumping ftrace buffer: [ 24.976238] (ftrace buffer empty) [ 24.979919] Modules linked in: [ 24.983209] CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted 4.9.98-ga03d0bb #21 [ 24.990369] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.999701] Workqueue: netns cleanup_net [ 25.003851] task: ffff8801d9a38000 task.stack: ffff8801d9a40000 [ 25.009875] RIP: 0010:[] [] addrconf_rt_table+0x127/0x290 [ 25.018715] RSP: 0018:ffff8801d9a47520 EFLAGS: 00010206 [ 25.024136] RAX: dffffc0000000000 RBX: 0000000000000200 RCX: ffff8801d9a38000 [ 25.031383] RDX: 0000000000000056 RSI: 0000000000000004 RDI: 00000000000002b0 [ 25.038629] RBP: ffff8801d9a47550 R08: ffff8801d9a38988 R09: 0000000000000001 [ 25.045876] R10: 0000000000000000 R11: 1ffff1003b34712c R12: 0000000000000000 [ 25.053121] R13: 00000000000000fe R14: ffff8801d5d78000 R15: ffff8801c6e93a90 [ 25.060368] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 25.068564] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.074415] CR2: 00007ffc08765914 CR3: 00000001be005000 CR4: 00000000001606f0 [ 25.081659] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.088899] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.096137] Stack: [ 25.098265] ffffffff83577d70 ffff8801d5d78000 0000000000000000 ffff8801d9178000 [ 25.106256] ffff8801bf0bb600 ffff8801c6e93a90 ffff8801d9a47598 ffffffff83578783 [ 25.114234] 0000000000000000 ffff880100000080 ffff8801c6e93900 ffff8801c6e93a90 [ 25.122224] Call Trace: [ 25.124786] [] ? addrconf_leave_solict+0x90/0x90 [ 25.131166] [] addrconf_get_prefix_route+0x33/0x270 [ 25.137802] [] __ipv6_ifa_notify+0x5d8/0x790 [ 25.143830] [] addrconf_ifdown+0x94f/0x10e0 [ 25.149768] [] ? add_addr+0x180/0x180 [ 25.155191] [] ? __lock_is_held+0xa2/0xf0 [ 25.160969] [] addrconf_notify+0x7f8/0x2160 [ 25.166932] [] ? inet6_ifinfo_notify+0x140/0x140 [ 25.173325] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 25.179622] [] ? ip_vs_dst_event+0x24c/0x650 [ 25.185655] [] ? ip6mr_device_event+0x165/0x1c0 [ 25.191955] [] notifier_call_chain+0xb4/0x1d0 [ 25.198084] [] raw_notifier_call_chain+0x2d/0x40 [ 25.204463] [] call_netdevice_notifiers_info+0x55/0x70 [ 25.211366] [] rollback_registered_many+0x5a4/0x920 [ 25.218010] [] ? free_netdev+0x300/0x300 [ 25.223713] [] ? mark_held_locks+0xc7/0x130 [ 25.229660] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 25.236473] [] unregister_netdevice_many.part.106+0x1b/0x110 [ 25.243894] [] default_device_exit_batch+0x353/0x410 [ 25.250618] [] ? unregister_netdevice_many+0x50/0x50 [ 25.257344] [] ? rtnl_unlock+0xe/0x10 [ 25.262781] [] ? default_device_exit+0x1c4/0x260 [ 25.269158] [] ? finish_wait+0x180/0x180 [ 25.274843] [] ? cfg80211_switch_netns+0x490/0x490 [ 25.281395] [] ? unregister_netdevice_many+0x50/0x50 [ 25.288117] [] ? dev_change_net_namespace+0xb30/0xb30 [ 25.294925] [] ops_exit_list.isra.6+0x105/0x160 [ 25.301214] [] cleanup_net+0x321/0x630 [ 25.306722] [] ? net_drop_ns+0x80/0x80 [ 25.312229] [] ? __lock_is_held+0xa2/0xf0 [ 25.317997] [] process_one_work+0x7e1/0x1500 [ 25.324023] [] ? process_one_work+0x728/0x1500 [ 25.330223] [] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 25.336685] [] worker_thread+0xd6/0x10a0 [ 25.342363] [] kthread+0x26d/0x300 [ 25.347521] [] ? process_one_work+0x1500/0x1500 [ 25.353808] [] ? kthread_park+0xa0/0xa0 [ 25.359402] [] ? kthread_park+0xa0/0xa0 [ 25.364997] [] ? kthread_park+0xa0/0xa0 [ 25.370594] [] ret_from_fork+0x5c/0x70 [ 25.376100] 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 [ 25.402848] RIP [] addrconf_rt_table+0x127/0x290 [ 25.409369] RSP [ 25.413358] ---[ end trace 1edbc36f80bf5ac1 ]--- [ 25.418190] Kernel panic - not syncing: Fatal exception [ 25.424005] Dumping ftrace buffer: [ 25.427523] (ftrace buffer empty) [ 25.431201] Kernel Offset: disabled [ 25.434798] Rebooting in 86400 seconds..