From b71e1cbac708fc3e6659b2356f365dd223e3ac01 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Tue, 25 Mar 2014 14:23:39 +0100
Subject: [PATCH 32/49] qcow2: Fix new L1 table size check (CVE-2014-0143)

RH-Author: Kevin Wolf <kwolf@redhat.com>
Message-id: <1395753835-7591-33-git-send-email-kwolf@redhat.com>
Patchwork-id: n/a
O-Subject: [virt-devel] [EMBARGOED RHEL-7.0 qemu-kvm PATCH 32/48] qcow2: Fix new L1 table size check (CVE-2014-0143)
Bugzilla: 1079320
RH-Acked-by: Jeff Cody <jcody@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1079320
Upstream status: Embargoed

The size in bytes is assigned to an int later, so check that instead of
the number of entries.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/qcow2-cluster.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index 87c13ce..943e3c6 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -55,7 +55,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
         }
     }
 
-    if (new_l1_size > INT_MAX) {
+    if (new_l1_size > INT_MAX / sizeof(uint64_t)) {
         return -EFBIG;
     }
 
-- 
1.7.1