Sven Baars : wbemprox: Avoid a use after free (Coverity).

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ea60927fbda8bb9635a8002450336a1cb506e82f
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=ea60927fbda8bb9635a8002450336a1cb506e82f

Author: Sven Baars <sbaars at codeweavers.com>
Date:   Sun Aug  2 19:20:23 2020 +0200

wbemprox: Avoid a use after free (Coverity).

Signed-off-by: Sven Baars <sbaars at codeweavers.com>
Signed-off-by: Hans Leidekker <hans at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/wbemprox/builtin.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/wbemprox/builtin.c b/dlls/wbemprox/builtin.c
index f055547a6b..4edda854b5 100644
--- a/dlls/wbemprox/builtin.c
+++ b/dlls/wbemprox/builtin.c
@@ -2116,9 +2116,9 @@ static WCHAR *get_diskdrive_serialnumber( WCHAR letter )
             heap_free( desc );
             break;
         }
+        size = desc->Size;
         heap_free( desc );
-        if (GetLastError() == ERROR_MORE_DATA) size = desc->Size;
-        else break;
+        if (GetLastError() != ERROR_MORE_DATA) break;
     }
 
 done: