From 712e78744e3a0332825a80298f38225b30dec88c Mon Sep 17 00:00:00 2001
From: bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Thu, 28 Apr 2005 21:09:32 +0000
Subject: probing fixes

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1425 c046a42c-6fe2-441c-8c8c-71466251a162
---
 block-cow.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'block-cow.c')

diff --git a/block-cow.c b/block-cow.c
index 15270dfd3f..eeeab7068b 100644
--- a/block-cow.c
+++ b/block-cow.c
@@ -54,7 +54,8 @@ static int cow_probe(const uint8_t *buf, int buf_size, const char *filename)
 {
     const struct cow_header_v2 *cow_header = (const void *)buf;
 
-    if (be32_to_cpu(cow_header->magic) == COW_MAGIC &&
+    if (buf_size >= sizeof(struct cow_header_v2) &&
+        be32_to_cpu(cow_header->magic) == COW_MAGIC &&
         be32_to_cpu(cow_header->version) == COW_VERSION) 
         return 100;
     else
-- 
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