audit: type=1400 audit(1543207070.459:2332): avc: denied { relabelto } for pid=13070 comm="syz-executor5" name="UDP" dev="sockfs" ino=142771 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:auditd_etc_t:s0 tclass=udp_socket permissive=0 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 6 Comm: kworker/u4:0 Not tainted 4.4.164+ #13 Workqueue: netns cleanup_net task: ffff8801da648000 task.stack: ffff8801da650000 RIP: 0010:[] [] addrconf_rt_table+0x126/0x290 net/ipv6/addrconf.c:2192 RSP: 0018:ffff8801da657590 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000004 RDX: 0000000000000067 RSI: 0000000000000004 RDI: 0000000000000338 RBP: ffff8801da6575c0 R08: ffff8801da6488c8 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff831a2c38 R12: 00000000000000fe R13: ffff8800a7b09100 R14: 0000000000000218 R15: ffff8801d7592b98 FS: 0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020005000 CR3: 00000000b40c6000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff825c5230 ffff8800a7b09100 0000000000000000 ffff8800aa01d700 ffff8800a7b04400 ffff8801d7592b98 ffff8801da657608 ffffffff825c5bc3 00000000d7592a00 ffff880100000080 ffff8801d7592a00 ffff8801d7592b98 Call Trace: [] addrconf_get_prefix_route+0x33/0x270 net/ipv6/addrconf.c:2246 [] __ipv6_ifa_notify+0x5f2/0x760 net/ipv6/addrconf.c:5234 [] addrconf_ifdown+0x5ce/0xbc0 net/ipv6/addrconf.c:3477 [] addrconf_notify+0x8d9/0x1a60 net/ipv6/addrconf.c:3339 [] notifier_call_chain+0xb9/0x1e0 kernel/notifier.c:93 [] __raw_notifier_call_chain kernel/notifier.c:394 [inline] [] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 [] call_netdevice_notifiers_info+0x55/0x70 net/core/dev.c:1643 [] call_netdevice_notifiers net/core/dev.c:1659 [inline] [] rollback_registered_many+0x594/0x9a0 net/core/dev.c:6368 [] unregister_netdevice_many+0x45/0x220 net/core/dev.c:7378 [] default_device_exit_batch+0x33f/0x3f0 net/core/dev.c:7836 [] ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:137 [] cleanup_net+0x3f2/0x880 net/core/net_namespace.c:452 [] process_one_work+0x824/0x1730 kernel/workqueue.c:2064 [] worker_thread+0xd9/0x1060 kernel/workqueue.c:2196 [] kthread+0x268/0x300 kernel/kthread.c:211 [] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510 Code: 5c 82 be 01 00 00 00 48 c7 c7 60 72 ea 82 e8 62 e8 c3 fe 48 8d bb 38 03 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 39 01 00 00 44 8b bb 38 03 RIP [] addrconf_rt_table+0x126/0x290 net/ipv6/addrconf.c:2192 RSP ---[ end trace 308e012eb7a89eec ]---