From: Andy Honig <ahonig@google.com>
Date: Wed, 27 Aug 2014 21:42:54 +0000 (-0700)
Subject: KVM: x86: Improve thread safety in pit
X-Git-Tag: v3.2.64~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=30a340f59414f02434e8b7a880241b2bd657cb7b;p=pandora-kernel.git

KVM: x86: Improve thread safety in pit

commit 2febc839133280d5a5e8e1179c94ea674489dae2 upstream.

There's a race condition in the PIT emulation code in KVM.  In
__kvm_migrate_pit_timer the pit_timer object is accessed without
synchronization.  If the race condition occurs at the wrong time this
can crash the host kernel.

This fixes CVE-2014-3611.

Signed-off-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

Reading git-diff-tree failed