From: Lubomir Rintel <lkundrak@v3.sk>
Date: Sun, 7 Jun 2009 14:23:48 +0000 (+0200)
Subject: x86: Fix non-lazy GS handling in sys_vm86()
X-Git-Tag: v2.6.31-rc1~412^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3aa6b186f86c5d06d6d92d14311ffed51f091f40;p=pandora-kernel.git

x86: Fix non-lazy GS handling in sys_vm86()

This fixes a stack corruption panic or null dereference oops
due to a bad GS in resume_userspace() when returning from
sys_vm86() and calling lockdep_sys_exit().

Only a problem when CONFIG_LOCKDEP and CONFIG_CC_STACKPROTECTOR
enabled.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Cc: H. Peter Anvin <hpa@zytor.com>
LKML-Reference: <1244384628.2323.4.camel@bimbo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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