netdev - Re: [PATCH net-next] tipc: fix out of bounds indexing

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Message-Id: <20140428.144926.436860974988702953.davem@davemloft.net>
Date:	Mon, 28 Apr 2014 14:49:26 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	erik.hugne@...csson.com
Cc:	netdev@...r.kernel.org, tipc-discussion@...ts.sourceforge.net,
	jon.maloy@...csson.com, maloy@...jonn.com, ying.xue@...driver.com,
	paul.gortmaker@...driver.com, richard.alpe@...csson.com
Subject: Re: [PATCH net-next] tipc: fix out of bounds indexing

From: <erik.hugne@...csson.com>
Date: Mon, 28 Apr 2014 08:20:09 +0200

> From: Erik Hugne <erik.hugne@...csson.com>
> 
> Commit 78acb1f9b898e85fa2c1e28e700b54b66b288e8d ("tipc: add
> ioctl to fetch link names") introduced a buffer overflow bug where
> specially crafted ioctl requests could cause out-of-bounds indexing
> of the node->links array. This was caused by an incorrect check vs
> MAX_BEARERS, and the static code checker complaint is:
> net/tipc/node.c:459 tipc_node_get_linkname() error: buffer overflow 'node->links' 2 <= 2
> 
> Signed-off-by: Erik Hugne <erik.hugne@...csson.com>
> Reported-by: Dan Carpenter <dan.carpenter@...cle.com>

Applied.
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