linux-kernel - [patch 20/29] netfilter: arpt_mangle: fix return values of checkentry

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Date:	Thu, 10 Mar 2011 15:54:26 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Patrick McHardy <kaber@...sh.net>
Subject: [patch 20/29] netfilter: arpt_mangle: fix return values of checkentry

2.6.37-stable review patch.  If anyone has any objections, please let us know.

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

From: Pablo Neira Ayuso <pablo@...filter.org>

commit 9d0db8b6b1da9e3d4c696ef29449700c58d589db upstream.

In 135367b "netfilter: xtables: change xt_target.checkentry return type",
the type returned by checkentry was changed from boolean to int, but the
return values where not adjusted.

arptables: Input/output error

This broke arptables with the mangle target since it returns true
under success, which is interpreted by xtables as >0, thus
returning EIO.

Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Patrick McHardy <kaber@...sh.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 net/ipv4/netfilter/arpt_mangle.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/net/ipv4/netfilter/arpt_mangle.c
+++ b/net/ipv4/netfilter/arpt_mangle.c
@@ -60,12 +60,12 @@ static int checkentry(const struct xt_tg
 
 	if (mangle->flags & ~ARPT_MANGLE_MASK ||
 	    !(mangle->flags & ARPT_MANGLE_MASK))
-		return false;
+		return -EINVAL;
 
 	if (mangle->target != NF_DROP && mangle->target != NF_ACCEPT &&
 	   mangle->target != XT_CONTINUE)
-		return false;
-	return true;
+		return -EINVAL;
+	return 0;
 }
 
 static struct xt_target arpt_mangle_reg __read_mostly = {


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