James Hawkins : msi: Fix a heap corruption bug by resizing the src string before adding to it.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 5cc4a8915f5b9873c16a2c2b6465d795fb05d019
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=5cc4a8915f5b9873c16a2c2b64...

Author: James Hawkins <truiken(a)gmail.com>
Date:   Fri Nov 10 13:26:38 2006 -0800

msi: Fix a heap corruption bug by resizing the src string before adding to it.

---

 dlls/msi/files.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/dlls/msi/files.c b/dlls/msi/files.c
index 38b1f8f..dc81e6a 100644
--- a/dlls/msi/files.c
+++ b/dlls/msi/files.c
@@ -469,8 +469,13 @@ static UINT download_remote_cabinet(MSIP
 
     *(ptr + 1) = '\0';
     ptr = strrchrW(mi->source, '\\');
+    src = msi_realloc(src, (lstrlenW(src) + lstrlenW(ptr)) * sizeof(WCHAR));
+    if (!src)
+        return ERROR_OUTOFMEMORY;
+
     lstrcatW(src, ptr + 1);
 
+    temppath[0] = '\0';
     cab = msi_download_file(src, temppath);
     lstrcpyW(mi->source, cab);