netdev - Re: [PATCH net-next] myri10ge: fix truesize underestimation

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:	Thu, 20 Oct 2011 16:45:14 -0400
From:	Andrew Gallatin <gallatin@...i.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	Jon Mason <mason@...i.com>, David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] myri10ge: fix truesize underestimation

On 10/20/11 16:44, Eric Dumazet wrote:
> Le jeudi 20 octobre 2011 à 15:33 -0500, Jon Mason a écrit :
>> On Thu, Oct 20, 2011 at 3:10 PM, Eric Dumazet<eric.dumazet@...il.com>  wrote:
>>> skb->truesize must account for allocated memory, not the used part of
>>> it. Doing this work is important to avoid unexpected OOM situations.
>>>
>>> Signed-off-by: Eric Dumazet<eric.dumazet@...il.com>
>>
>> Acked-by: Jon Mason<mason@...i.com>
>
> Thanks for reviewing Jon !
>
>

Please wait a second..  I think the patch is incorrect.

There is already code in myri10ge_rx_skb_build() which
attempts to set the truesize.  However, it sets it to
the used, rather than the allocated size so it is apparently
incorrect.

I'd prefer we fix that code.

Thanks,

Drew
--
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