kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7749 Comm: syz-executor.5 Not tainted 4.19.109-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:193 [inline]
RIP: 0010:__nf_nat_l4proto_find net/netfilter/nf_nat_core.c:73 [inline]
RIP: 0010:get_unique_tuple+0x27a/0x1d50 net/netfilter/nf_nat_core.c:336
Code: c1 e9 03 80 3c 11 00 0f 85 cd 17 00 00 4a 8b 14 e5 e0 0e 8e 89 4c 8d 24 c2 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 99 17 00 00 49 8b 04 24 48 89 85 08 ff ff ff e8
RSP: 0018:ffff88808ffb6e18 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88808ffb6fc0 RCX: 1ffffffff131c253
RDX: 0000000000000009 RSI: ffffffff85d1e507 RDI: ffffffff898e1298
RBP: ffff88808ffb6f70 R08: ffff88809eebc280 R09: ffffed1015cc4733
R10: ffffed1015cc4732 R11: ffff8880ae623993 R12: 0000000000000048
R13: 0000000000000001 R14: ffff88808ffb7010 R15: ffff888043f227c0
FS:  00007f3994753700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000b70004 CR3: 000000005af00000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000006954 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 nf_nat_setup_info+0x1c3/0x840 net/netfilter/nf_nat_core.c:431
 __nf_nat_alloc_null_binding+0x164/0x1d0 net/netfilter/nf_nat_core.c:490
 nfnetlink_parse_nat_setup+0x38f/0x410 net/netfilter/nf_nat_core.c:882
 ctnetlink_parse_nat_setup+0xb6/0x640 net/netfilter/nf_conntrack_netlink.c:1521
 ctnetlink_setup_nat net/netfilter/nf_conntrack_netlink.c:1591 [inline]
 ctnetlink_create_conntrack+0x4b7/0x1280 net/netfilter/nf_conntrack_netlink.c:1984
 ctnetlink_new_conntrack+0x4f5/0xde0 net/netfilter/nf_conntrack_netlink.c:2114
 nfnetlink_rcv_msg+0xc9e/0xf4b 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+0x80b/0xcd0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f3994752c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f39947536d4 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000914 R14: 00000000004cbb3e R15: 000000000076bf0c
Modules linked in:
---[ end trace 060cf4bc1e56f719 ]---
RIP: 0010:__read_once_size include/linux/compiler.h:193 [inline]
RIP: 0010:__nf_nat_l4proto_find net/netfilter/nf_nat_core.c:73 [inline]
RIP: 0010:get_unique_tuple+0x27a/0x1d50 net/netfilter/nf_nat_core.c:336
Code: c1 e9 03 80 3c 11 00 0f 85 cd 17 00 00 4a 8b 14 e5 e0 0e 8e 89 4c 8d 24 c2 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 99 17 00 00 49 8b 04 24 48 89 85 08 ff ff ff e8
RSP: 0018:ffff88808ffb6e18 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88808ffb6fc0 RCX: 1ffffffff131c253
RDX: 0000000000000009 RSI: ffffffff85d1e507 RDI: ffffffff898e1298
RBP: ffff88808ffb6f70 R08: ffff88809eebc280 R09: ffffed1015cc4733
R10: ffffed1015cc4732 R11: ffff8880ae623993 R12: 0000000000000048
R13: 0000000000000001 R14: ffff88808ffb7010 R15: ffff888043f227c0
FS:  00007f3994753700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000076c000 CR3: 000000005af00000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400