audit: type=1400 audit(1591448495.231:8): avc:  denied  { execmem } for  pid=6428 comm="syz-executor414" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
netlink: 20 bytes leftover after parsing attributes in process `syz-executor414'.
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
CPU: 1 PID: 6430 Comm: syz-executor414 Not tainted 4.19.126-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:nfnetlink_parse_nat net/netfilter/nf_nat_core.c:847 [inline]
RIP: 0010:nfnetlink_parse_nat_setup+0x21f/0x420 net/netfilter/nf_nat_core.c:884
Code: c3 89 c6 e8 e3 a8 95 fb 85 db 0f 88 78 01 00 00 e8 66 a7 95 fb 49 8d 7e 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 db 01 00 00 48 8b 7c 24 08 4c 89 fe 41 ff 56 38
RSP: 0018:ffff8880860c7060 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85d1e35d
RDX: 0000000060000007 RSI: ffffffff85d1e36a RDI: 000000030000003b
RBP: ffff88808f542040 R08: ffff8880a5c86640 R09: ffffed1015ce5081
R10: ffffed1015ce5080 R11: ffff8880ae728407 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000300000003 R15: ffff8880860c7098
FS:  00007f27348e4700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f72dc714020 CR3: 00000000a0b86000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ctnetlink_parse_nat_setup+0xb6/0x640 net/netfilter/nf_conntrack_netlink.c:1521
 ctnetlink_setup_nat net/netfilter/nf_conntrack_netlink.c:1596 [inline]
 ctnetlink_create_conntrack+0x501/0x12b0 net/netfilter/nf_conntrack_netlink.c:1984
 ctnetlink_new_conntrack+0x4f5/0xdd1 net/netfilter/nf_conntrack_netlink.c:2114
 nfnetlink_rcv_msg+0xc6b/0xf50 net/netfilter/nfnetlink.c:228
 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455
 nfnetlink_rcv+0x1b2/0x420 net/netfilter/nfnetlink.c:560
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x6e3/0xcc0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:632
 sock_no_sendpage+0xf8/0x140 net/core/sock.c:2645
 kernel_sendpage+0x82/0xd0 net/socket.c:3378
 sock_sendpage+0x84/0xa0 net/socket.c:847
 pipe_to_sendpage+0x263/0x320 fs/splice.c:452
 splice_from_pipe_feed fs/splice.c:503 [inline]
 __splice_from_pipe+0x38f/0x7a0 fs/splice.c:627
 splice_from_pipe+0xd9/0x140 fs/splice.c:662
 do_splice_from fs/splice.c:852 [inline]
 do_splice fs/splice.c:1154 [inline]
 __do_sys_splice fs/splice.c:1428 [inline]
 __se_sys_splice+0xf18/0x1560 fs/splice.c:1408
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x445959
Code: e8 bc b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f27348e3d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000006dac58 RCX: 0000000000445959
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00000000006dac50 R08: 000000000004ffe0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac5c
R13: 00000000004ade28 R14: 0000000000000006 R15: 0000000000000018
Modules linked in:
---[ end trace 8373eabd710aff70 ]---
RIP: 0010:nfnetlink_parse_nat net/netfilter/nf_nat_core.c:847 [inline]
RIP: 0010:nfnetlink_parse_nat_setup+0x21f/0x420 net/netfilter/nf_nat_core.c:884
Code: c3 89 c6 e8 e3 a8 95 fb 85 db 0f 88 78 01 00 00 e8 66 a7 95 fb 49 8d 7e 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 db 01 00 00 48 8b 7c 24 08 4c 89 fe 41 ff 56 38
RSP: 0018:ffff8880860c7060 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85d1e35d
RDX: 0000000060000007 RSI: ffffffff85d1e36a RDI: 000000030000003b
RBP: ffff88808f542040 R08: ffff8880a5c86640 R09: ffffed1015ce5081
R10: ffffed1015ce5080 R11: ffff8880ae728407 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000300000003 R15: ffff8880860c7098
FS:  00007f27348e4700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f72dc718000 CR3: 00000000a0b86000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400