From 1826fdaaacd0d6898bb3bd64935edd520dd95428 Mon Sep 17 00:00:00 2001
From: Fam Zheng <famz@redhat.com>
Date: Tue, 6 Aug 2013 15:44:48 +0800
Subject: [PATCH 02/13] vmdk: use unsigned values for on disk header fields

Message-id: <1377573001-27070-3-git-send-email-famz@redhat.com>
Patchwork-id: 53782
O-Subject: [RHEL-7 qemu-kvm PATCH 02/13] vmdk: use unsigned values for on disk
        header fields
Bugzilla: 995866
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>

The size and offset fields are all non-negative values, use uint64_t for
them to avoid getting negative in memory value by int overflow.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit e98768d43799cd3f00b358bfbe455fdae793d3e8)
Signed-off-by: Fam Zheng <famz@redhat.com>
---
 block/vmdk.c |   24 ++++++++++++------------
 1 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/block/vmdk.c b/block/vmdk.c
index e85f4ea..78ea480 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -67,14 +67,14 @@ typedef struct {
 typedef struct {
     uint32_t version;
     uint32_t flags;
-    int64_t capacity;
-    int64_t granularity;
-    int64_t desc_offset;
-    int64_t desc_size;
-    int32_t num_gtes_per_gte;
-    int64_t rgd_offset;
-    int64_t gd_offset;
-    int64_t grain_offset;
+    uint64_t capacity;
+    uint64_t granularity;
+    uint64_t desc_offset;
+    uint64_t desc_size;
+    uint32_t num_gtes_per_gte;
+    uint64_t rgd_offset;
+    uint64_t gd_offset;
+    uint64_t grain_offset;
     char filler[1];
     char check_bytes[4];
     uint16_t compressAlgorithm;
@@ -109,7 +109,7 @@ typedef struct VmdkExtent {
 
 typedef struct BDRVVmdkState {
     CoMutex lock;
-    int desc_offset;
+    uint64_t desc_offset;
     bool cid_updated;
     uint32_t parent_cid;
     int num_extents;
@@ -490,7 +490,7 @@ static int vmdk_open_vmdk3(BlockDriverState *bs,
 }
 
 static int vmdk_open_desc_file(BlockDriverState *bs, int flags,
-                               int64_t desc_offset);
+                               uint64_t desc_offset);
 
 static int vmdk_open_vmdk4(BlockDriverState *bs,
                            BlockDriverState *file,
@@ -508,7 +508,7 @@ static int vmdk_open_vmdk4(BlockDriverState *bs,
         return ret;
     }
     if (header.capacity == 0) {
-        int64_t desc_offset = le64_to_cpu(header.desc_offset);
+        uint64_t desc_offset = le64_to_cpu(header.desc_offset);
         if (desc_offset) {
             return vmdk_open_desc_file(bs, flags, desc_offset << 9);
         }
@@ -728,7 +728,7 @@ next_line:
 }
 
 static int vmdk_open_desc_file(BlockDriverState *bs, int flags,
-                               int64_t desc_offset)
+                               uint64_t desc_offset)
 {
     int ret;
     char *buf = NULL;
-- 
1.7.1