audit: type=1400 audit(1574591795.904:851): avc: denied { create } for pid=18602 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 8082 Comm: kworker/u4:13 Not tainted 4.9.202+ #0 Workqueue: netns cleanup_net task: 00000000e860a167 task.stack: 0000000091aeca1d RIP: 0010:[] [<000000006a408d8a>] addrconf_rt_table+0x127/0x290 net/ipv6/addrconf.c:2226 RSP: 0018:ffff8801c5f37508 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8801cded9100 RCX: 0000000000000004 RDX: 0000000000000056 RSI: 0000000000000000 RDI: 00000000000002b0 RBP: ffff8801c5f37538 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 00000000000000fe R13: 0000000000000200 R14: 0000000000000000 R15: ffff88019c9c5c40 FS: 0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c4352af000 CR3: 00000001c508e000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff826c4610 ffff8801c7248a00 ffff8801cded9100 0000000000000000 0000000000000080 ffff88019c9c5c40 ffff8801c5f37580 ffffffff826c5524 0000000000000000 ffff8801c7248b90 ffff8801c7248a00 ffff8801c7248b90 Call Trace: [<00000000fbb75dbc>] addrconf_get_prefix_route+0x34/0x270 net/ipv6/addrconf.c:2280 [<0000000059509400>] __ipv6_ifa_notify+0x642/0x880 net/ipv6/addrconf.c:5520 [<00000000e9b86c0f>] addrconf_ifdown+0xa89/0x14d0 net/ipv6/addrconf.c:3692 [<00000000a2d90e34>] addrconf_notify+0x7ac/0x1f50 net/ipv6/addrconf.c:3496 [<00000000c4147eb0>] notifier_call_chain+0xb4/0x1d0 kernel/notifier.c:93 [<000000007ea0a456>] __raw_notifier_call_chain kernel/notifier.c:394 [inline] [<000000007ea0a456>] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401 [<0000000018068f53>] call_netdevice_notifiers_info+0x56/0x70 net/core/dev.c:1647 [<00000000b35fb9c0>] call_netdevice_notifiers net/core/dev.c:1663 [inline] [<00000000b35fb9c0>] rollback_registered_many+0x6ef/0xb50 net/core/dev.c:6863 [<000000004e3b8ff5>] unregister_netdevice_many.part.0+0x1b/0x1e0 net/core/dev.c:7912 [<00000000aa346a34>] unregister_netdevice_many+0x3b/0x50 net/core/dev.c:7911 [<00000000c943d61d>] ip_tunnel_delete_net+0x2b1/0x390 net/ipv4/ip_tunnel.c:1069 [<00000000c02f99b5>] vti_exit_net+0x129/0x1f0 net/ipv4/ip_vti.c:499 [<000000005543200a>] ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:136 [<00000000ca749675>] cleanup_net+0x3d6/0x8a0 net/core/net_namespace.c:474 [<00000000bc92caa4>] process_one_work+0x88b/0x1600 kernel/workqueue.c:2114 [<00000000c90407e9>] worker_thread+0x5df/0x11d0 kernel/workqueue.c:2251 [<000000002490f7c3>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000bfcd06dd>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Code: 6c 82 be 01 00 00 00 48 c7 c7 60 59 0d 83 e8 11 de b4 fe 49 8d be 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 35 01 00 00 45 8b be b0 02 RIP [<000000006a408d8a>] addrconf_rt_table+0x127/0x290 net/ipv6/addrconf.c:2226 RSP ---[ end trace 3582d8da434a976b ]---