[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 8.873475] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.219698] random: sshd: uninitialized urandom read (32 bytes read) [ 25.601023] random: sshd: uninitialized urandom read (32 bytes read) [ 25.752349] random: crng init done Warning: Permanently added '10.128.0.103' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 32.423783] kasan: CONFIG_KASAN_INLINE enabled [ 32.428460] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.435835] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 32.442062] Modules linked in: [ 32.445347] CPU: 0 PID: 64 Comm: kworker/u4:1 Not tainted 4.9.140+ #68 [ 32.451993] Workqueue: netns cleanup_net [ 32.456148] task: ffff8801d7872f80 task.stack: ffff8801d7998000 [ 32.462172] RIP: 0010:[] [] addrconf_rt_table+0x127/0x290 [ 32.471167] RSP: 0018:ffff8801d799f510 EFLAGS: 00010206 [ 32.476596] RAX: dffffc0000000000 RBX: 0000000000000200 RCX: 0000000000000004 [ 32.483839] RDX: 0000000000000056 RSI: 0000000000000004 RDI: 00000000000002b0 [ 32.491094] RBP: ffff8801d799f540 R08: ffff8801d7873830 R09: 0000000000000001 [ 32.498338] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 [ 32.505692] R13: 00000000000000fe R14: ffff8801d9e56600 R15: ffff8801ced75a90 [ 32.512940] FS: 0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 32.521163] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.527016] CR2: 00000000004a20fd CR3: 00000001cf403000 CR4: 00000000001606b0 [ 32.534259] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.541504] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.548860] Stack: [ 32.551129] ffffffff826bcee0 ffff8801d9e56600 0000000000000000 ffff8801cec71e80 [ 32.559120] ffff8801cee6b180 ffff8801ced75a90 ffff8801d799f588 ffffffff826bd8f3 [ 32.567124] 00000000cee6b038 ffff880100000080 ffff8801ced75900 ffff8801ced75a90 [ 32.575140] Call Trace: [ 32.577709] [] ? addrconf_leave_solict+0x90/0x90 [ 32.584085] [] addrconf_get_prefix_route+0x33/0x270 [ 32.590721] [] __ipv6_ifa_notify+0x5d8/0x790 [ 32.596753] [] addrconf_ifdown+0xaae/0x1420 [ 32.602696] [] ? add_addr+0x180/0x180 [ 32.608118] [] addrconf_notify+0x8ee/0x2140 [ 32.614061] [] ? inet6_ifinfo_notify+0x140/0x140 [ 32.620443] [] notifier_call_chain+0xb4/0x1d0 [ 32.626558] [] raw_notifier_call_chain+0x2d/0x40 [ 32.632936] [] call_netdevice_notifiers_info+0x55/0x70 [ 32.639852] [] rollback_registered_many+0x6e5/0xb50 [ 32.646495] [] ? free_netdev+0x300/0x300 [ 32.652181] [] ? mark_held_locks+0xc7/0x130 [ 32.658123] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 32.665026] [] unregister_netdevice_many+0x48/0x220 [ 32.671667] [] default_device_exit_batch+0x33f/0x3f0 [ 32.678490] [] ? unregister_netdevice_many+0x220/0x220 [ 32.685400] [] ? rtnl_unlock+0xe/0x10 [ 32.690952] [] ? default_device_exit+0x1c4/0x260 [ 32.697387] [] ? prepare_to_wait_event+0x8c0/0x8c0 [ 32.703946] [] ? unregister_netdevice_many+0x220/0x220 [ 32.710868] [] ? dev_change_net_namespace+0xb80/0xb80 [ 32.717685] [] ops_exit_list.isra.0+0x105/0x160 [ 32.723988] [] cleanup_net+0x3f2/0x8b0 [ 32.729496] [] ? net_drop_ns+0x80/0x80 [ 32.735014] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 32.741737] [] ? debug_object_deactivate+0x214/0x340 [ 32.748488] [] ? check_preemption_disabled+0x3b/0x200 [ 32.755309] [] process_one_work+0x831/0x15f0 [ 32.761340] [] ? process_one_work+0x774/0x15f0 [ 32.767563] [] ? cancel_delayed_work_sync+0x20/0x20 [ 32.774205] [] worker_thread+0xd6/0x1140 [ 32.779889] [] ? ___preempt_schedule+0x16/0x18 [ 32.786093] [] kthread+0x26d/0x300 [ 32.791252] [] ? process_one_work+0x15f0/0x15f0 [ 32.797542] [] ? kthread_park+0xa0/0xa0 [ 32.803137] [] ? __switch_to_asm+0x34/0x70 [ 32.808992] [] ? kthread_park+0xa0/0xa0 [ 32.814585] [] ? kthread_park+0xa0/0xa0 [ 32.820181] [] ret_from_fork+0x5c/0x70 [ 32.825690] Code: 82 be 01 00 00 00 48 c7 c7 60 c3 0c 83 e8 92 fb b4 fe 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 [ 32.852678] RIP [] addrconf_rt_table+0x127/0x290 [ 32.859179] RSP [ 32.862866] ---[ end trace 8b3a8576ce61c907 ]--- [ 32.867632] Kernel panic - not syncing: Fatal exception [ 32.873444] Kernel Offset: disabled [ 32.877051] Rebooting in 86400 seconds..