BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:1355
in_atomic(): 0, irqs_disabled(): 0, pid: 31909, name: syz-executor.5
3 locks held by syz-executor.5/31909:
 #0: 000000005ba3fd10 (&table[i].mutex){+.+.}, at: nfnl_lock net/netfilter/nfnetlink.c:62 [inline]
 #0: 000000005ba3fd10 (&table[i].mutex){+.+.}, at: nfnetlink_rcv_msg+0xa13/0xf50 net/netfilter/nfnetlink.c:223
 #1: 00000000f08768c1 (rcu_read_lock){....}, at: ctnetlink_create_conntrack+0x199/0x12b0 net/netfilter/nf_conntrack_netlink.c:1929
 #2: 000000000ca48c72 (&mm->mmap_sem){++++}, at: __do_page_fault+0x3e2/0xde0 arch/x86/mm/fault.c:1341
Preemption disabled at:
[<0000000000000000>]           (null)
CPU: 1 PID: 31909 Comm: syz-executor.5 Not tainted 4.19.128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
 ___might_sleep.cold+0x230/0x24b kernel/sched/core.c:6192
 __do_page_fault+0x40d/0xde0 arch/x86/mm/fault.c:1355
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff8880482971d0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90010521000
RDX: 1ffffffff131c4b6 RSI: ffff888048297210 RDI: ffff888048297260
RBP: ffff88808ab65ac0 R08: ffff88804f6b25c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff898e2578 R15: ffff888048297210
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 87787067 P4D 87787067 PUD 87488067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 31909 Comm: syz-executor.5 Tainted: G        W         4.19.128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff8880482971d0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90010521000
RDX: 1ffffffff131c4b6 RSI: ffff888048297210 RDI: ffff888048297260
RBP: ffff88808ab65ac0 R08: ffff88804f6b25c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff898e2578 R15: ffff888048297210
FS:  00007f5491e13700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000009e3d3000 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:847 [inline]
 nfnetlink_parse_nat_setup+0x235/0x420 net/netfilter/nf_nat_core.c:884
 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+0x4b7/0x12b0 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
 ___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: 0033:0x45ca69
Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f5491e12c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004ff240 RCX: 000000000045ca69
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000981 R14: 00000000004cc619 R15: 00007f5491e136d4
Modules linked in:
CR2: 0000000000000000
---[ end trace 133f9f6b67633be1 ]---
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff8880482971d0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90010521000
RDX: 1ffffffff131c4b6 RSI: ffff888048297210 RDI: ffff888048297260
RBP: ffff88808ab65ac0 R08: ffff88804f6b25c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff898e2578 R15: ffff888048297210
FS:  00007f5491e13700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3c5c002000 CR3: 000000009e3d3000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400