netdev - [PATCH] NET: catch signed nla_len() retval in tcf_simp

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Message-ID: <4806C501.20300@tiscali.nl>
Date:	Thu, 17 Apr 2008 05:33:21 +0200
From:	Roel Kluin <12o3l@...cali.nl>
To:	hadi@...erus.ca, netdev@...r.kernel.org,
	lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH] NET: catch signed nla_len() retval in tcf_simp_init()

'datalen' is unsigned, use 'ret' instead to catch a negative return value.

Signed-off-by: Roel Kluin <12o3l@...cali.nl>
---
diff --git a/net/sched/act_simple.c b/net/sched/act_simple.c
index fbde461..b78d015 100644
--- a/net/sched/act_simple.c
+++ b/net/sched/act_simple.c
@@ -114,9 +114,10 @@ static int tcf_simp_init(struct nlattr *nla, struct nlattr *est,
 	if (defdata == NULL)
 		return -EINVAL;
 
-	datalen = nla_len(tb[TCA_DEF_DATA]);
-	if (datalen <= 0)
+	ret = nla_len(tb[TCA_DEF_DATA]);
+	if (ret <= 0)
 		return -EINVAL;
+	datalen = ret;
 
 	pc = tcf_hash_check(parm->index, a, bind, &simp_hash_info);
 	if (!pc) {
--
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