From: robin.murphy@arm•com (Robin Murphy)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH RESEND] arm: don't break misaligned NEON load/store
Date: Thu, 25 Sep 2014 12:05:28 +0100 [thread overview]
Message-ID: <5423F6F8.2060902@arm.com> (raw)
In-Reply-To: <15fc86b0d2b4984377d7116113b0f2f9498bd088.1411392970.git.robin.murphy@arm.com>
On 22/09/14 14:48, Robin Murphy wrote:
> The alignment fixup incorrectly decodes faulting ARM VLDn/VSTn
> instructions (where the optional alignment hint is given but incorrect)
> as LDR/STR, leading to register corruption. Detect these and correctly
> treat them as unhandled, so that userspace gets the fault it expects.
>
> Reported-by: Simon Hosie <simon.hosie@arm•com>
> Signed-off-by: Robin Murphy <robin.murphy@arm•com>
> Cc: <stable@vger•kernel.org>
> ---
>
> Hi all,
>
> This was met with a resounding silence a while back[1], but the bug is
> still causing annoyance - apparently Clang intrinsics can be a little
> over-eager with alignment hints. Regardless of whose fault that is,
> the kernel shouldn't be silently mangling registers unexpectedly.
>
> Any objections to me dropping this into the patch system?
>
Since nobody's voiced any complaints, I've submitted this as 8165/1.
Robin.
prev parent reply other threads:[~2014-09-25 11:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-22 13:48 [PATCH RESEND] arm: don't break misaligned NEON load/store Robin Murphy
2014-09-25 11:05 ` Robin Murphy [this message]
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=5423F6F8.2060902@arm.com \
--to=robin.murphy@arm$(echo .)com \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
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