kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5092 Comm: syz-executor.5 Not tainted 4.19.114-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+0x21a/0x410 net/netfilter/nf_nat_core.c:884
Code: c3 89 c6 e8 18 c8 94 fb 85 db 0f 88 72 01 00 00 e8 9b c6 94 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 d2 01 00 00 48 8b 7c 24 08 4c 89 fe 41 ff 56 38
RSP: 0018:ffff88820b5af1e0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90010525000
RDX: 0000000000000008 RSI: ffffffff85d2ddd5 RDI: 0000000000000041
RBP: ffff888034bea380 R08: ffff88808ba74480 R09: ffff88820b5af260
R10: ffffed10416b5e51 R11: ffff88820b5af28f R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000009 R15: ffff88820b5af210
FS:  00007f72c0918700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000b70004 CR3: 00000000225b1000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
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+0x501/0x1280 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: 0033:0x45c889
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:00007f72c0917c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f72c09186d4 RCX: 000000000045c889
RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000004
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000095c R14: 00000000004cc13b R15: 000000000076bf0c
Modules linked in:
IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready
audit: type=1800 audit(1586591316.061:5518): pid=5113 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="syz-executor.0" name="file0" dev="sda1" ino=16100 res=0
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
audit: type=1804 audit(1586591316.081:5519): pid=5113 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir302682597/syzkaller.bnCM56/1581/file0" dev="sda1" ino=16100 res=1
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
audit: type=1800 audit(1586591316.291:5520): pid=5130 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="syz-executor.0" name="file0" dev="sda1" ino=16786 res=0
audit: type=1804 audit(1586591316.321:5521): pid=5130 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir302682597/syzkaller.bnCM56/1582/file0" dev="sda1" ino=16786 res=1
---[ end trace 6661602e6ef10df1 ]---
RIP: 0010:nfnetlink_parse_nat net/netfilter/nf_nat_core.c:847 [inline]
RIP: 0010:nfnetlink_parse_nat_setup+0x21a/0x410 net/netfilter/nf_nat_core.c:884
Code: c3 89 c6 e8 18 c8 94 fb 85 db 0f 88 72 01 00 00 e8 9b c6 94 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 d2 01 00 00 48 8b 7c 24 08 4c 89 fe 41 ff 56 38
RSP: 0018:ffff88820b5af1e0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90010525000
RDX: 0000000000000008 RSI: ffffffff85d2ddd5 RDI: 0000000000000041
RBP: ffff888034bea380 R08: ffff88808ba74480 R09: ffff88820b5af260
R10: ffffed10416b5e51 R11: ffff88820b5af28f R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000009 R15: ffff88820b5af210
FS:  00007f72c0918700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000071d694 CR3: 00000000225b1000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600