linux-kernel - [PATCH 6/6] netfilter: xt_u32: fix length checks in u32_match

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <3a5bf48d1567d7136baaac80dfa4c94f@pinky>
Date:	Thu, 16 Aug 2007 14:19:12 +0100
From:	Andy Whitcroft <apw@...dowen.org>
To:	linux-kernel@...r.kernel.org
Cc:	Randy Dunlap <rdunlap@...otime.net>, Andrew Morton <akpm@...l.org>,
	Andy Whitcroft <apw@...dowen.org>,
	Andy Whitcroft <apw@...dowen.org>,
	netfilter-devel@...ts.netfilter.org
Subject: [PATCH 6/6] netfilter: xt_u32: fix length checks in u32_match_it


It seems an extraneous trailing ';' has slipped into the skb length
checks in u32_match_it() triggering an unconditional missmatch.

Signed-off-by: Andy Whitcroft <apw@...dowen.org>
Cc: netfilter-devel@...ts.netfilter.org
---
 net/netfilter/xt_u32.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/net/netfilter/xt_u32.c b/net/netfilter/xt_u32.c
index 74f9b14..bec4279 100644
--- a/net/netfilter/xt_u32.c
+++ b/net/netfilter/xt_u32.c
@@ -36,7 +36,7 @@ static bool u32_match_it(const struct xt_u32 *data,
 		at  = 0;
 		pos = ct->location[0].number;
 
-		if (skb->len < 4 || pos > skb->len - 4);
+		if (skb->len < 4 || pos > skb->len - 4)
 			return false;
 
 		ret   = skb_copy_bits(skb, pos, &n, sizeof(n));
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/