From: Denys Vlasenko <dvlasenk@redhat.com>
To: Andy Lutomirski <luto@kernel.org>, X86 ML <x86@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Borislav Petkov <bp@alien8.de>,
Denys Vlasenko <vda.linux@googlemail.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Brian Gerst <brgerst@gmail.com>, Ingo Molnar <mingo@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Oleg Nesterov <oleg@redhat.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Alexei Starovoitov <ast@plumgrid.com>,
Will Drewry <wad@chromium.org>, Kees Cook <keescook@chromium.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86, selftests: Add a test for the "sysret_ss_attrs" bug
Date: Sat, 25 Apr 2015 15:55:25 +0200 [thread overview]
Message-ID: <553B9CCD.4040408@redhat.com> (raw)
In-Reply-To: <resend_4d740841bac383742949e2fefb03982736595087.git.luto@kernel.org>
On 04/25/2015 12:09 AM, Andy Lutomirski wrote:
> On AMD CPUs, SYSRET can return with a valid SS descriptor with with
> the hidden attributes set to an unusable state. Make sure the kernel
> doesn't let this happen. This detects an as-yet-unfixed regression.
>
> Note that the 64-bit version of this test fails on AMD CPUs on all
> kernel versions, although the issue in the 64-bit case is much less
> severe than in the 32-bit case.
Confirmed to detect the "bug" in 64-bit userspace.
next prev parent reply other threads:[~2015-04-25 13:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-24 22:09 [PATCH] x86, selftests: Add a test for the "sysret_ss_attrs" bug Andy Lutomirski
2015-04-25 13:55 ` Denys Vlasenko [this message]
2015-05-08 13:30 ` [tip:x86/asm] x86, selftests: Add a test for the "sysret_ss_attrs " bug tip-bot for Andy Lutomirski
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=553B9CCD.4040408@redhat.com \
--to=dvlasenk@redhat.com \
--cc=ast@plumgrid.com \
--cc=bp@alien8.de \
--cc=brgerst@gmail.com \
--cc=fweisbec@gmail.com \
--cc=hpa@zytor.com \
--cc=keescook@chromium.org \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=mingo@kernel.org \
--cc=oleg@redhat.com \
--cc=rostedt@goodmis.org \
--cc=torvalds@linux-foundation.org \
--cc=vda.linux@googlemail.com \
--cc=wad@chromium.org \
--cc=x86@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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.