netfilter: nf_queue: do not allow packet truncation below transport header offset

stable inclusion
from stable-v5.10.135
commit 440dccd80f627e0e11ceb0429e4cdab61857d17e
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I5J9R4?from=project-issue
CVE: CVE-2022-36946

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=440dccd80f627e0e11ceb0429e4cdab61857d17e

--------------------------------

[ Upstream commit 99a63d36 ]

Domingo Dirutigliano and Nicola Guerrera report kernel panic when
sending nf_queue verdict with 1-byte nfta_payload attribute.

The IP/IPv6 stack pulls the IP(v6) header from the packet after the
input hook.

If user truncates the packet below the header size, this skb_pull() will
result in a malformed skb (skb->len < 0).

Fixes: 7af4cc3f ("[NETFILTER]: Add "nfnetlink_queue" netfilter queue handler over nfnetlink")
Reported-by: NDomingo Dirutigliano <pwnzer0tt1@proton.me>
Signed-off-by: NFlorian Westphal <fw@strlen.de>
Reviewed-by: NPablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZiyang Xuan <william.xuanziyang@huawei.com>
Reviewed-by: NYue Haibing <yuehaibing@huawei.com>
Reviewed-by: NXiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

net/netfilter/nfnetlink_queue.c

@@ -838,11 +838,16 @@ nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum)
 }
 
 static int
-nfqnl_mangle(void *data, int data_len, struct nf_queue_entry *e, int diff)
+nfqnl_mangle(void *data, unsigned int data_len, struct nf_queue_entry *e, int diff)
 {
 	struct sk_buff *nskb;
 
 	if (diff < 0) {
+		unsigned int min_len = skb_transport_offset(e->skb);
+
+		if (data_len < min_len)
+			return -EINVAL;
+
 		if (pskb_trim(e->skb, data_len))
 			return -ENOMEM;
 	} else if (diff > 0) {