[Qemu-devel] [PATCH for-2.3 3/6] vmdk: Clean up descriptor file reading

[Fam Zheng <famz@redhat.com>]

Zeroing a buffer that will be filled right after is not necessary, and
allocating a power of two + 1 is naughty.

Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
---
 block/vmdk.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/block/vmdk.c b/block/vmdk.c
index 28d22db..0c5769c 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -558,14 +558,15 @@ static char *vmdk_read_desc(BlockDriverState *file, uint64_t desc_offset,
     }
 
     size = MIN(size, 1 << 20);  /* avoid unbounded allocation */
-    buf = g_malloc0(size + 1);
+    buf = g_malloc(size);
 
-    ret = bdrv_pread(file, desc_offset, buf, size);
+    ret = bdrv_pread(file, desc_offset, buf, size - 1);
     if (ret < 0) {
         error_setg_errno(errp, -ret, "Could not read from file");
         g_free(buf);
         return NULL;
     }
+    buf[ret - 1] = 0;
 
     return buf;
 }
-- 
1.9.3