All of lore.kernel.org
 help / color / mirror / Atom feed
From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Christophe Leroy <christophe.leroy@c-s.fr>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powerpc/ptdump: fix W+X verification
Date: Wed, 29 Jan 2020 16:17:36 +1100 (AEDT)	[thread overview]
Message-ID: <486sDw3HcXz9sRR@ozlabs.org> (raw)
In-Reply-To: <0d894839fdbb19070f0e1e4140363be4f2bb62fc.1578989540.git.christophe.leroy@c-s.fr>

On Tue, 2020-01-14 at 08:13:09 UTC, Christophe Leroy wrote:
> Verification cannot rely on simple bit checking because on some
> platforms PAGE_RW is 0, checking that a page is not W means
> checking that PAGE_RO is set instead of checking that PAGE_RW
> is not set.
> 
> Use pte helpers instead of checking bits.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
> Fixes: 453d87f6a8ae ("powerpc/mm: Warn if W+X pages found on boot")

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/d80ae83f1f932ab7af47b54d0d3bef4f4dba489f

cheers

      reply	other threads:[~2020-01-29  6:11 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-14  8:13 [PATCH] powerpc/ptdump: fix W+X verification Christophe Leroy
2020-01-14  8:13 ` Christophe Leroy
2020-01-29  5:17 ` Michael Ellerman [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=486sDw3HcXz9sRR@ozlabs.org \
    --to=patch-notifications@ellerman.id.au \
    --cc=benh@kernel.crashing.org \
    --cc=christophe.leroy@c-s.fr \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=paulus@samba.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.