netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'.
BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:1363
in_atomic(): 0, irqs_disabled(): 0, pid: 3222, name: syz-executor.0
3 locks held by syz-executor.0/3222:
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff851ee7da>] nfnl_lock net/netfilter/nfnetlink.c:61 [inline]
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff851ee7da>] nfnetlink_rcv_msg+0x78a/0xc00 net/netfilter/nfnetlink.c:209
 #1:  (rcu_read_lock){....}, at: [<ffffffff85242096>] ctnetlink_create_conntrack+0x166/0x1040 net/netfilter/nf_conntrack_netlink.c:1785
 #2:  (&mm->mmap_sem){++++}, at: [<ffffffff8128b84d>] __do_page_fault+0x2cd/0xb40 arch/x86/mm/fault.c:1349
Preemption disabled at:
[<ffffffff814ba880>] rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1185 [inline]
[<ffffffff814ba880>] rcu_lockdep_current_cpu_online+0x30/0x140 kernel/rcu/tree.c:1177
CPU: 1 PID: 3222 Comm: syz-executor.0 Not tainted 4.14.172-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x13e/0x194 lib/dump_stack.c:58
 ___might_sleep.cold+0x1bd/0x1f9 kernel/sched/core.c:6041
 __do_page_fault+0x2f0/0xb40 arch/x86/mm/fault.c:1363
 page_fault+0x25/0x50 arch/x86/entry/entry_64.S:1122
RIP: 0010:          (null)
RSP: 0018:ffff88808cfc7268 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88808cfc72f0 RCX: ffffc90005e18000
RDX: 1ffffffff1125fb5 RSI: ffff88808cfc72a0 RDI: ffff88808cfc72f0
RBP: ffff8880a80b31c0 R08: ffffffff873c5f20 R09: ffff88808cfc72f0
R10: ffffed10119f8e63 R11: ffff88808cfc731f R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8892fd70 R15: ffff88808cfc72a0
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP:           (null)
PGD 9d249067 P4D 9d249067 PUD 53e26067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 3222 Comm: syz-executor.0 Tainted: G        W       4.14.172-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888059836000 task.stack: ffff88808cfc0000
RIP: 0010:          (null)
RSP: 0018:ffff88808cfc7268 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88808cfc72f0 RCX: ffffc90005e18000
RDX: 1ffffffff1125fb5 RSI: ffff88808cfc72a0 RDI: ffff88808cfc72f0
RBP: ffff8880a80b31c0 R08: ffffffff873c5f20 R09: ffff88808cfc72f0
R10: ffffed10119f8e63 R11: ffff88808cfc731f R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8892fd70 R15: ffff88808cfc72a0
FS:  00007f567df88700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000076c000 CR3: 000000009d248000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 nfnetlink_parse_nat net/netfilter/nf_nat_core.c:747 [inline]
 nfnetlink_parse_nat_setup+0x1e0/0x370 net/netfilter/nf_nat_core.c:784
 ctnetlink_parse_nat_setup+0x70/0x490 net/netfilter/nf_conntrack_netlink.c:1421
 ctnetlink_setup_nat net/netfilter/nf_conntrack_netlink.c:1496 [inline]
 ctnetlink_create_conntrack+0x477/0x1040 net/netfilter/nf_conntrack_netlink.c:1840
 ctnetlink_new_conntrack+0x460/0xc30 net/netfilter/nf_conntrack_netlink.c:1964
 nfnetlink_rcv_msg+0xa08/0xc00 net/netfilter/nfnetlink.c:214
 netlink_rcv_skb+0x127/0x370 net/netlink/af_netlink.c:2432
 nfnetlink_rcv+0x1ab/0x1650 net/netfilter/nfnetlink.c:515
 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline]
 netlink_unicast+0x437/0x620 net/netlink/af_netlink.c:1312
 netlink_sendmsg+0x733/0xbe0 net/netlink/af_netlink.c:1877
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xc5/0x100 net/socket.c:656
 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c479
RSP: 002b:00007f567df87c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f567df886d4 RCX: 000000000045c479
RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000006
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000959 R14: 00000000004cbcd9 R15: 000000000076bf2c
Code:  Bad RIP value.
RIP:           (null) RSP: ffff88808cfc7268
CR2: 0000000000000000
---[ end trace 94320d2bc26e6e31 ]---
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1538 sclass=netlink_route_socket pig=3263 comm=syz-executor.4