netdev - Re: [PATCH] net: fec: fix potential use after free

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]

Message-ID: <20131219193231.GB14612@netboy>
Date:	Thu, 19 Dec 2013 20:32:31 +0100
From:	Richard Cochran <richardcochran@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Frank Li <Frank.Li@...escale.com>
Subject: Re: [PATCH] net: fec: fix potential use after free

On Thu, Dec 19, 2013 at 10:53:02AM -0800, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> skb_tx_timestamp(skb) should be called _before_ TX completion
> has a chance to trigger, otherwise it is too late and we access
> freed memory.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Fixes: de5fb0a05348 ("net: fec: put tx to napi poll function to fix dead lock")

So the hw_lock spin lock was protecting against this issue?

Nice catch. How ever did you find this?

Acked-by: Richard Cochran <richardcochran@...il.com>
--
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