BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:1355 in_atomic(): 0, irqs_disabled(): 0, pid: 27403, name: syz-executor.3 3 locks held by syz-executor.3/27403: #0: 00000000681bd84b (&table[i].mutex){+.+.}, at: nfnl_lock net/netfilter/nfnetlink.c:62 [inline] #0: 00000000681bd84b (&table[i].mutex){+.+.}, at: nfnetlink_rcv_msg+0x98d/0xf60 net/netfilter/nfnetlink.c:223 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. #1: 000000004bbbceb9 (rcu_read_lock){....}, at: ctnetlink_create_conntrack+0x199/0x12c0 net/netfilter/nf_conntrack_netlink.c:1929 #2: 000000005462440b (&mm->mmap_sem){++++}, at: __do_page_fault+0x3e2/0xde0 arch/x86/mm/fault.c:1341 Preemption disabled at: [] rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1076 [inline] [] rcu_lockdep_current_cpu_online+0x32/0x1b0 kernel/rcu/tree.c:1068 CPU: 0 PID: 27403 Comm: syz-executor.3 Not tainted 4.19.142-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+0x235/0x250 kernel/sched/core.c:6196 __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:ffff88820c70f190 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000971d000 RDX: 1ffffffff135ec26 RSI: ffff88820c70f210 RDI: ffff88820c70f260 RBP: ffff88808a659d80 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000046696b13 R12: 0000000000000000 R13: 0000000000000001 R14: ffffffff89af60f8 R15: ffff88820c70f210 BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 PGD 215a5f067 P4D 215a5f067 PUD 215a5e067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 27403 Comm: syz-executor.3 Tainted: G W 4.19.142-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:ffff88820c70f190 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000971d000 RDX: 1ffffffff135ec26 RSI: ffff88820c70f210 RDI: ffff88820c70f260 RBP: ffff88808a659d80 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000046696b13 R12: 0000000000000000 R13: 0000000000000001 R14: ffffffff89af60f8 R15: ffff88820c70f210 FS: 00007efdcc203700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000212e62000 CR4: 00000000001406f0 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+0x243/0x640 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+0x4bb/0x12c0 net/netfilter/nf_conntrack_netlink.c:1984 ctnetlink_new_conntrack+0x4f3/0xde0 net/netfilter/nf_conntrack_netlink.c:2114 nfnetlink_rcv_msg+0xc4f/0xf60 net/netfilter/nfnetlink.c:228 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455 nfnetlink_rcv+0x1b2/0x41b net/netfilter/nfnetlink.c:560 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:632 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2115 __sys_sendmsg net/socket.c:2153 [inline] __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2160 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45d5b9 Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007efdcc202c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000029340 RCX: 000000000045d5b9 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004 RBP: 000000000118d160 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118d12c R13: 00007ffd87d430af R14: 00007efdcc2039c0 R15: 000000000118d12c Modules linked in: CR2: 0000000000000000 ---[ end trace cffaaa59f4edceb6 ]--- RIP: 0010: (null) Code: Bad RIP value. RSP: 0018:ffff88820c70f190 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000971d000 RDX: 1ffffffff135ec26 RSI: ffff88820c70f210 RDI: ffff88820c70f260 RBP: ffff88808a659d80 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000046696b13 R12: 0000000000000000 R13: 0000000000000001 R14: ffffffff89af60f8 R15: ffff88820c70f210 FS: 00007efdcc203700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000212e62000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400