From: Andi Kleen <ak@suse.de>
Date: Fri, 21 Sep 2007 14:16:18 +0000 (+0200)
Subject: x86_64: Zero extend all registers after ptrace in 32bit entry path.
X-Git-Tag: v2.6.23-rc8~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=176df2457ef6207156ca1a40991c54ca01fef567;p=pandora-kernel.git

x86_64: Zero extend all registers after ptrace in 32bit entry path.

Strictly it's only needed for eax.

It actually does a little more than strictly needed -- the other registers
are already zero extended.

Also remove the now unnecessary and non functional compat task check
in ptrace.

This is CVE-2007-4573

Found by Wojciech Purczynski

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

Reading git-diff-tree failed