From: Kurt Roeckx <Q@ping.be>
To: Russell King <rmk@arm.linux.org.uk>
Cc: Vadim Lebedev <vlebedev@aplio.fr>, linux-kernel@vger.kernel.org
Subject: Re: Potenitial security hole in the kernel
Date: Tue, 29 May 2001 01:46:35 +0200 [thread overview]
Message-ID: <20010529014635.A3499@ping.be> (raw)
In-Reply-To: <003601c0e7bf$41953080$0101a8c0@LAP> <20010529001256.F9203@flint.arm.linux.org.uk> <20010529013030.A3381@ping.be>
In-Reply-To: <20010529013030.A3381@ping.be>
On Tue, May 29, 2001 at 01:30:30AM +0200, Kurt Roeckx wrote:
> You should never "return" from userspace to kernelspace. The
> only way to go from user space to kernel space should be by using
> a system call.
If you were able to return to kernel space, it already means
you're running as kernel in the first place. There is no reason
to even do the return in the first place.
Kurt
next prev parent reply other threads:[~2001-05-28 23:47 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-28 21:43 Potenitial security hole in the kernel Vadim Lebedev
2001-05-28 22:21 ` Philip Blundell
2001-05-28 22:26 ` Vadim Lebedev
2001-05-28 22:29 ` Kurt Roeckx
2001-05-28 22:30 ` Vadim Lebedev
2001-05-28 23:15 ` Kurt Roeckx
2001-05-28 22:44 ` Brett Frankenberger
2001-05-28 23:12 ` Russell King
2001-05-28 23:30 ` Kurt Roeckx
2001-05-28 23:46 ` Kurt Roeckx [this message]
2001-05-29 0:32 ` Jamie Lokier
2001-05-29 7:35 ` Chris Wedgwood
2001-05-29 10:14 ` Jamie Lokier
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=20010529014635.A3499@ping.be \
--to=q@ping.be \
--cc=linux-kernel@vger.kernel.org \
--cc=rmk@arm.linux.org.uk \
--cc=vlebedev@aplio.fr \
/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