linux-kernel - [PATCH] X.25: Fix address field length calculation

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Message-ID: <525D5131.9070007@datus.com>
Date:	Tue, 15 Oct 2013 14:29:06 +0000
From:	Kelleter, Günther <GKelleter@...us.com>
To:	"andrew.hendry@...il.com" <andrew.hendry@...il.com>
CC:	"davem@...emloft.net" <davem@...emloft.net>,
	"linux-x25@...r.kernel.org" <linux-x25@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] X.25: Fix address field length calculation

Addresses are BCD encoded, not ASCII. x25_addr_ntoa got it right.

Signed-off-by: Guenther Kelleter <gkelleter@...us.com>
---
Wrong length calculation leads to rejection of CALL ACCEPT packets.

 net/x25/af_x25.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 45a3ab5..2daf224 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -98,7 +98,7 @@ int x25_parse_address_block(struct sk_buff *skb,
 	}
  	len = *skb->data;
-	needed = 1 + (len >> 4) + (len & 0x0f);
+	needed = 1 + ((len >> 4) + (len & 0x0f) + 1) / 2;
  	if (!pskb_may_pull(skb, needed)) {
 		/* packet is too short to hold the addresses it claims
-- 
1.8.3.4.71.g0878476
--
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