BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:1385
in_atomic(): 0, irqs_disabled(): 0, pid: 26009, name: syz-executor.0
3 locks held by syz-executor.0/26009:
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff85337306>] nfnl_lock net/netfilter/nfnetlink.c:61 [inline]
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff85337306>] nfnetlink_rcv_msg+0x726/0xc00 net/netfilter/nfnetlink.c:209
 #1:  (rcu_read_lock){....}, at: [<ffffffff85386996>] ctnetlink_create_conntrack+0x166/0x1050 net/netfilter/nf_conntrack_netlink.c:1785
 #2:  (&mm->mmap_sem){++++}, at: [<ffffffff8128eeba>] __do_page_fault+0x2fa/0xb50 arch/x86/mm/fault.c:1371
Preemption disabled at:
[<ffffffff8137723c>] irq_enter+0x6c/0xd0 kernel/softirq.c:353
CPU: 0 PID: 26009 Comm: syz-executor.0 Not tainted 4.14.195-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+0x1b2/0x283 lib/dump_stack.c:58
 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6042
 __do_page_fault+0x31d/0xb50 arch/x86/mm/fault.c:1385
 page_fault+0x25/0x50 arch/x86/entry/entry_64.S:1123
RIP: 0010:          (null)
RSP: 0018:ffff88804faa7228 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88804faa72f0 RCX: ffffc90006b00000
RDX: 1ffffffff1127599 RSI: ffff88804faa72a0 RDI: ffff88804faa72f0
RBP: ffff888091948340 R08: 000000000000004f R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8893ac90 R15: ffff88804faa72a0
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP:           (null)
PGD a814f067 P4D a814f067 PUD 8803a067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 26009 Comm: syz-executor.0 Tainted: G        W       4.14.195-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888091c1e580 task.stack: ffff88804faa0000
RIP: 0010:          (null)
RSP: 0018:ffff88804faa7228 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88804faa72f0 RCX: ffffc90006b00000
RDX: 1ffffffff1127599 RSI: ffff88804faa72a0 RDI: ffff88804faa72f0
RBP: ffff888091948340 R08: 000000000000004f R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8893ac90 R15: ffff88804faa72a0
FS:  00007f06bb295700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff4e91a1020 CR3: 00000000a4765000 CR4: 00000000001426f0
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+0x1f3/0x560 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+0x47b/0x1050 net/netfilter/nf_conntrack_netlink.c:1840
 ctnetlink_new_conntrack+0x457/0xbf0 net/netfilter/nf_conntrack_netlink.c:1964
 nfnetlink_rcv_msg+0x9bb/0xc00 net/netfilter/nfnetlink.c:214
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433
 nfnetlink_rcv+0x1ab/0x1da0 net/netfilter/nfnetlink.c:515
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x6c8/0x800 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+0x46/0xbb
RIP: 0033:0x45d5b9
RSP: 002b:00007f06bb294c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000002a600 RCX: 000000000045d5b9
RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000004
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffcb19e0f7f R14: 00007f06bb2959c0 R15: 000000000118cf4c
Code:  Bad RIP value.
RIP:           (null) RSP: ffff88804faa7228
CR2: 0000000000000000
---[ end trace 0af1223ca86030f2 ]---