[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.090969] 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: [ 19.620260] random: sshd: uninitialized urandom read (32 bytes read) [ 20.128257] random: sshd: uninitialized urandom read (32 bytes read) [ 20.878746] random: sshd: uninitialized urandom read (32 bytes read) [ 21.013668] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.11' (ECDSA) to the list of known hosts. [ 26.533163] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program [ 26.620853] IPVS: Creating netns size=2536 id=1 [ 26.634765] IPVS: Creating netns size=2536 id=2 [ 26.823247] kasan: CONFIG_KASAN_INLINE enabled [ 26.827848] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.835394] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 26.841614] Dumping ftrace buffer: [ 26.845128] (ftrace buffer empty) [ 26.848811] Modules linked in: [ 26.852098] CPU: 1 PID: 1619 Comm: kworker/u4:3 Not tainted 4.9.98-ga03d0bb #18 [ 26.859520] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.868859] Workqueue: netns cleanup_net [ 26.873015] task: ffff8801cf838000 task.stack: ffff8801cf840000 [ 26.879042] RIP: 0010:[] [] addrconf_rt_table+0x127/0x290 [ 26.887900] RSP: 0018:ffff8801cf847520 EFLAGS: 00010206 [ 26.893324] RAX: dffffc0000000000 RBX: 0000000000000200 RCX: ffff8801cf838000 [ 26.900570] RDX: 0000000000000056 RSI: 0000000000000004 RDI: 00000000000002b0 [ 26.907813] RBP: ffff8801cf847550 R08: ffff8801cf838988 R09: 0000000000000001 [ 26.915058] R10: 0000000000000000 R11: 1ffff10039f0712c R12: 0000000000000000 [ 26.922302] R13: 00000000000000fe R14: ffff8801d9b96600 R15: ffff8801b5c5f810 [ 26.929562] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 26.937766] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.943624] CR2: 00007ffc327bf964 CR3: 00000001cc403000 CR4: 00000000001606f0 [ 26.950871] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.958115] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.965360] Stack: [ 26.967482] ffffffff83577d70 ffff8801d9b96600 0000000000000000 ffff8801b62e8000 [ 26.975459] ffff8801b6326d00 ffff8801b5c5f810 ffff8801cf847598 ffffffff83578783 [ 26.983434] 0000000000000000 ffff880100000080 ffff8801b5c5f680 ffff8801b5c5f810 [ 26.991422] Call Trace: [ 26.993989] [] ? addrconf_leave_solict+0x90/0x90 [ 27.000384] [] addrconf_get_prefix_route+0x33/0x270 [ 27.007027] [] __ipv6_ifa_notify+0x5d8/0x790 [ 27.013064] [] addrconf_ifdown+0x94f/0x10e0 [ 27.019012] [] ? add_addr+0x180/0x180 [ 27.024433] [] ? __lock_is_held+0xa2/0xf0 [ 27.030201] [] addrconf_notify+0x7f8/0x2160 [ 27.036154] [] ? inet6_ifinfo_notify+0x140/0x140 [ 27.042534] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 27.048828] [] ? ip_vs_dst_event+0x24c/0x650 [ 27.054866] [] ? ip6mr_device_event+0x165/0x1c0 [ 27.061172] [] notifier_call_chain+0xb4/0x1d0 [ 27.067291] [] raw_notifier_call_chain+0x2d/0x40 [ 27.073682] [] call_netdevice_notifiers_info+0x55/0x70 [ 27.080583] [] rollback_registered_many+0x5a4/0x920 [ 27.087220] [] ? free_netdev+0x300/0x300 [ 27.092906] [] ? mark_held_locks+0xc7/0x130 [ 27.098854] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 27.105676] [] unregister_netdevice_many.part.106+0x1b/0x110 [ 27.113105] [] default_device_exit_batch+0x353/0x410 [ 27.119844] [] ? unregister_netdevice_many+0x50/0x50 [ 27.126578] [] ? rtnl_unlock+0xe/0x10 [ 27.132001] [] ? default_device_exit+0x1c4/0x260 [ 27.138386] [] ? finish_wait+0x180/0x180 [ 27.144073] [] ? cfg80211_switch_netns+0x490/0x490 [ 27.150628] [] ? unregister_netdevice_many+0x50/0x50 [ 27.157355] [] ? dev_change_net_namespace+0xb30/0xb30 [ 27.164175] [] ops_exit_list.isra.6+0x105/0x160 [ 27.170468] [] cleanup_net+0x321/0x630 [ 27.175979] [] ? net_drop_ns+0x80/0x80 [ 27.181501] [] ? __lock_is_held+0xa2/0xf0 [ 27.187281] [] process_one_work+0x7e1/0x1500 [ 27.193328] [] ? process_one_work+0x728/0x1500 [ 27.199543] [] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 27.206018] [] worker_thread+0xd6/0x10a0 [ 27.211721] [] ? __schedule+0x655/0x1bd0 [ 27.217427] [] kthread+0x26d/0x300 [ 27.222601] [] ? process_one_work+0x1500/0x1500 [ 27.228918] [] ? kthread_park+0xa0/0xa0 [ 27.234535] [] ? kthread_park+0xa0/0xa0 [ 27.240158] [] ? kthread_park+0xa0/0xa0 [ 27.245762] [] ret_from_fork+0x5c/0x70 [ 27.251270] 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 [ 27.278100] RIP [] addrconf_rt_table+0x127/0x290 [ 27.284608] RSP [ 27.288505] ---[ end trace 1d36138e56c13eb2 ]--- [ 27.293301] Kernel panic - not syncing: Fatal exception [ 27.299212] Dumping ftrace buffer: [ 27.302737] (ftrace buffer empty) [ 27.306422] Kernel Offset: disabled [ 27.310031] Rebooting in 86400 seconds..