netdev - Re: [PATCH 1/2] net: stmmac: use correct DMA buffer size in the RX descriptor

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:   Tue, 10 Dec 2019 21:40:17 +0000
From:   "Daniel Walker (danielwa)" <danielwa@...co.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     "Aviraj Cj (acj)" <acj@...co.com>,
        "peppe.cavallaro@...com" <peppe.cavallaro@...com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "xe-linux-external(mailer list)" <xe-linux-external@...co.com>
Subject: Re: [PATCH 1/2] net: stmmac: use correct DMA buffer size in the RX
 descriptor

On Tue, Dec 10, 2019 at 09:55:42PM +0100, Greg KH wrote:
> On Tue, Dec 10, 2019 at 09:06:58AM -0800, Aviraj CJ wrote:
> > We always program the maximum DMA buffer size into the receive descriptor,
> > although the allocated size may be less. E.g. with the default MTU size
> > we allocate only 1536 bytes. If somebody sends us a bigger frame, then
> > memory may get corrupted.
> > 
> > Program DMA using exact buffer sizes.
> > 
> > [Adopted based on upstream commit c13a936f46e3321ad2426443296571fab2feda44
> > ("net: stmmac: use correct DMA buffer size in the RX descriptor")
> > by Aaro Koskinen <aaro.koskinen@...ia.com> ]
> 
> Adopted to what?
> 
> What is this patch for, it looks just like the commit you reference
> here.
> 
> totally confused,


We're using the patches on the v4.4 -stable branch. It doesn't have these patches and
the backport had rejects.

Daniel