audit: type=1400 audit(1587458138.451:8): avc:  denied  { execmem } for  pid=6334 comm="syz-executor673" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process 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: 0 PID: 6353 Comm: syz-executor673 Not tainted 4.14.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880974b6400 task.stack: ffff888097850000
RIP: 0010:__write_once_size include/linux/compiler.h:210 [inline]
RIP: 0010:__hlist_del include/linux/list.h:679 [inline]
RIP: 0010:hlist_del_rcu include/linux/rculist.h:427 [inline]
RIP: 0010:vxlan_fdb_destroy+0xa3/0x1b0 drivers/net/vxlan.c:787
RSP: 0018:ffff888097857128 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: ffff8880974d2500 RCX: 1ffff11012f0ae1b
RDX: 1bd5a00000000040 RSI: ffff8880974d2500 RDI: ffff8880985852c0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200
R13: ffff8880974d2508 R14: ffff888097857228 R15: ffff888098585180
FS:  00007fd228e08700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff83914b000 CR3: 000000008dacc000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __vxlan_dev_create+0x3bc/0x710 drivers/net/vxlan.c:3272
 vxlan_newlink+0xa3/0xe0 drivers/net/vxlan.c:3493
 rtnl_newlink+0xecb/0x1720 net/core/rtnetlink.c:2728
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4315
 netlink_rcv_skb+0x127/0x370 net/netlink/af_netlink.c:2433
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x620 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x733/0xbe0 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xc5/0x100 net/socket.c:656
 sock_no_sendpage+0xe5/0x110 net/core/sock.c:2572
 kernel_sendpage+0x82/0xd0 net/socket.c:3407
 sock_sendpage+0x84/0xa0 net/socket.c:871
 pipe_to_sendpage+0x226/0x2d0 fs/splice.c:451
 splice_from_pipe_feed fs/splice.c:502 [inline]
 __splice_from_pipe+0x332/0x740 fs/splice.c:626
 splice_from_pipe+0xc6/0x120 fs/splice.c:661
 do_splice_from fs/splice.c:851 [inline]
 do_splice fs/splice.c:1147 [inline]
 SYSC_splice fs/splice.c:1402 [inline]
 SyS_splice+0xca0/0x1230 fs/splice.c:1382
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x44a359
RSP: 002b:00007fd228e07cd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000006dbc58 RCX: 000000000044a359
RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000006dbc50 R08: 000000000004ffe2 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc5c
R13: 00007ffe1a5486ff R14: 00007fd228e089c0 R15: 20c49ba5e353f7cf
Code: 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 fe 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 63 08 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 d2 00 00 00 48 85 ed 49 89 2c 24 74 28 e8 95 
RIP: __write_once_size include/linux/compiler.h:210 [inline] RSP: ffff888097857128
RIP: __hlist_del include/linux/list.h:679 [inline] RSP: ffff888097857128
RIP: hlist_del_rcu include/linux/rculist.h:427 [inline] RSP: ffff888097857128
RIP: vxlan_fdb_destroy+0xa3/0x1b0 drivers/net/vxlan.c:787 RSP: ffff888097857128
---[ end trace 01843a3e5f689b87 ]---