From: Borislav Petkov <bp@amd64.org>
To: kernel-janitors@vger.kernel.org
Subject: Re: [patch] x86, microcode, AMD: use after free in free_cache()
Date: Thu, 06 Sep 2012 16:16:49 +0000 [thread overview]
Message-ID: <20120906161649.GA2684@aftab.osrc.amd.com> (raw)
In-Reply-To: <20120905123042.GB6128@elgon.mountain>
On Thu, Sep 06, 2012 at 07:04:01AM -0700, Dan Carpenter wrote:
> You wouldn't see it unless something called kmalloc() on another CPU
> and reused the freed memory. Or if you had CONFIG_DEBUG_SLAB enabled
> then I believe that will poison freed memory immediately.
Oh, I see.
Also, I could probably see it if I do
p = NULL;
to the iterator AFAICT.
> (Btw, I haven't tested this code either before or after my patch
> because I don't have any AMD systems).
I'll run it when I get back from my vacation next week.
Thanks.
--
Regards/Gruss,
Boris.
Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach
GM: Alberto Bozzo
Reg: Dornach, Landkreis Muenchen
HRB Nr. 43632 WEEE Registernr: 129 19551
next prev parent reply other threads:[~2012-09-06 16:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-05 12:30 [patch] x86, microcode, AMD: use after free in free_cache() Dan Carpenter
2012-09-05 13:20 ` Borislav Petkov
2012-09-05 23:42 ` Dan Carpenter
2012-09-06 12:01 ` Borislav Petkov
2012-09-06 12:30 ` Dan Carpenter
2012-09-06 13:06 ` Borislav Petkov
2012-09-06 14:04 ` Dan Carpenter
2012-09-06 16:16 ` Borislav Petkov [this message]
2012-09-12 11:00 ` Borislav Petkov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120906161649.GA2684@aftab.osrc.amd.com \
--to=bp@amd64.org \
--cc=kernel-janitors@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox