linux-kernel - Re: [PATCH v1 0/2] spi: Make dummy SG handling robust

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: <3f0606f3-c781-49e1-a946-dc9aea77f835@notapiano>
Date: Fri, 31 May 2024 13:14:17 -0400
From: Nícolas F. R. A. Prado <nfraprado@...labora.com>
To: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Neil Armstrong <neil.armstrong@...aro.org>
Subject: Re: [PATCH v1 0/2] spi: Make dummy SG handling robust

On Fri, May 31, 2024 at 06:51:46PM +0300, Andy Shevchenko wrote:
> On Fri, May 31, 2024 at 6:46 PM Andy Shevchenko
> <andy.shevchenko@...il.com> wrote:
> > On Fri, May 31, 2024 at 5:37 PM Nícolas F. R. A. Prado
> > <nfraprado@...labora.com> wrote:
> > > On Fri, May 31, 2024 at 12:44:31PM +0300, Andy Shevchenko wrote:
> 
> ...
> 
> > > applying either of these patches causes issues. See the traces for each one
> > > below. This was tested on top of next-20240531, which works fine.
> >
> > Oh, thank you very much for prompt testing! Can you test just the
> > second one without the revert?
> 
> Ah, you wrote "either", so it seems you have tried that already.

Yes exactly. Both patches are troublesome. Patch 2 causes a slightly different
null pointer dereference, in "dcache_clean_poc+0x20/0x38", as the stack trace I
posted shows.

Thanks,
Nícolas