From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Scott Wood <scottwood@freescale.com>
Cc: linuxppc-dev@ozlabs.org, paulus@samba.org
Subject: Re: Executing from readablee, no-exec pages
Date: Sat, 07 Jul 2007 12:33:32 +1000 [thread overview]
Message-ID: <1183775612.3388.193.camel@localhost.localdomain> (raw)
In-Reply-To: <20070706164942.GA10806@ld0162-tx32.am.freescale.net>
> Well, it means that leaving VM_READ out of the check (except where the
> hardware PTE has an exec bit) isn't really buying us anything
> security-wise (especially since the primary reason for no-exec protection
> is to avoid code injections via stack overflow, and those pages will
> usually already be present), so it doesn't hurt much to let things keep
> working.
>
> At the least, I'd like it to keep working for a few more kernel releases
> (with a warning printed when a VM_EXEC-only test would have failed), so
> people have time to upgrade glibc.
I agree. Care to send a patch ? :-0
Ben.
next prev parent reply other threads:[~2007-07-07 2:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-05 21:55 Executing from readablee, no-exec pages Scott Wood
2007-07-05 22:38 ` Rodrigo Rubira Branco
2007-07-06 11:18 ` Johannes Berg
2007-07-06 13:36 ` Segher Boessenkool
2007-07-06 13:43 ` Johannes Berg
2007-07-06 13:24 ` Segher Boessenkool
2007-07-06 16:49 ` Scott Wood
2007-07-07 2:33 ` Benjamin Herrenschmidt [this message]
2007-07-06 14:42 ` David Woodhouse
2007-07-07 2:33 ` Benjamin Herrenschmidt
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=1183775612.3388.193.camel@localhost.localdomain \
--to=benh@kernel.crashing.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=paulus@samba.org \
--cc=scottwood@freescale.com \
/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.