netdev - Re: [PATCH] bridge: netfilter: fix a memory leak

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Sun, 22 Aug 2010 21:36:32 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	xiaosuo@...il.com
Cc:	shemminger@...ux-foundation.org, bridge@...ts.linux-foundation.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH] bridge: netfilter: fix a memory leak

From: Changli Gao <xiaosuo@...il.com>
Date: Fri, 20 Aug 2010 13:03:16 +0800

> nf_bridge_alloc() always reset the skb->nf_bridge, so we should always
> put the old one. skb->nf_bridge->use is initialized in nf_bridge_alloc(),
> so we don't need to initialize it again.
> 
> Signed-off-by: Changli Gao <xiaosuo@...il.com>

We just memcpy()'d 'nf_bridge' to 'tmp', that why the ->use count is
going to be something other than '1'.  It now has the ->use count that
'nf_bridge' did.

And that is why we must explicitly do atomic_set() on 'tmp'.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html