qemu/0164-vdi-Fix-warning-from-clang.patch
2012-10-28 14:05:07 -04:00

76 lines
2.1 KiB
Diff

From 928865de80da6a23e6f0d4d86187c52f6c940255 Mon Sep 17 00:00:00 2001
From: Stefan Weil <sw@weilnetz.de>
Date: Fri, 17 Aug 2012 15:23:24 +0200
Subject: [PATCH] vdi: Fix warning from clang
ccc-analyzer reports these warnings:
block/vdi.c:704:13: warning: Dereference of null pointer
bmap[i] = VDI_UNALLOCATED;
^
block/vdi.c:702:13: warning: Dereference of null pointer
bmap[i] = i;
^
Moving some code into the if block fixes this.
It also avoids calling function write with 0 bytes of data.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 514f21a5d4613e495adc2e2dd48f18091454efb8)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
block/vdi.c | 25 ++++++++++++-------------
1 file changed, 12 insertions(+), 13 deletions(-)
diff --git a/block/vdi.c b/block/vdi.c
index c4f1529..550cf58 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -628,7 +628,6 @@ static int vdi_create(const char *filename, QEMUOptionParameter *options)
VdiHeader header;
size_t i;
size_t bmap_size;
- uint32_t *bmap;
logout("\n");
@@ -693,21 +692,21 @@ static int vdi_create(const char *filename, QEMUOptionParameter *options)
result = -errno;
}
- bmap = NULL;
if (bmap_size > 0) {
- bmap = (uint32_t *)g_malloc0(bmap_size);
- }
- for (i = 0; i < blocks; i++) {
- if (image_type == VDI_TYPE_STATIC) {
- bmap[i] = i;
- } else {
- bmap[i] = VDI_UNALLOCATED;
+ uint32_t *bmap = g_malloc0(bmap_size);
+ for (i = 0; i < blocks; i++) {
+ if (image_type == VDI_TYPE_STATIC) {
+ bmap[i] = i;
+ } else {
+ bmap[i] = VDI_UNALLOCATED;
+ }
}
+ if (write(fd, bmap, bmap_size) < 0) {
+ result = -errno;
+ }
+ g_free(bmap);
}
- if (write(fd, bmap, bmap_size) < 0) {
- result = -errno;
- }
- g_free(bmap);
+
if (image_type == VDI_TYPE_STATIC) {
if (ftruncate(fd, sizeof(header) + bmap_size + blocks * block_size)) {
result = -errno;
--
1.7.12.1