From: Jeremy Sowden <jeremy@azazel.net>
Date: Mon, 5 Jun 2023 12:17:28 +0000 (+0900)
Subject: xt_ipp2p: fix an off-by-one error
X-Git-Tag: v3.25~18
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=38a85247cf5ee58b08ff4d40712ff5f1fc4b1ebc;p=thirdparty%2Fxtables-addons.git

xt_ipp2p: fix an off-by-one error

When checking for waste, we check that the packet is at least eight
bytes long and then examine the first nine bytes. Fix the length check.

Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
---

diff --git a/extensions/xt_ipp2p.c b/extensions/xt_ipp2p.c
index e311926..d11594b 100644
--- a/extensions/xt_ipp2p.c
+++ b/extensions/xt_ipp2p.c
@@ -793,7 +793,7 @@ search_xdcc(const unsigned char *payload, const unsigned int plen)
 static unsigned int
 search_waste(const unsigned char *payload, const unsigned int plen)
 {
-	if (plen >= 8 && memcmp(payload, "GET.sha1:", 9) == 0)
+	if (plen >= 9 && memcmp(payload, "GET.sha1:", 9) == 0)
 		return IPP2P_WASTE * 100 + 0;
 
 	return 0;