Paul Gofman : win32u: Avoid leaking previous buffer in get_buffer_space().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 568e90ad117c3de8d858beb990808a1e2e26a88f
URL:    https://gitlab.winehq.org/wine/wine/-/commit/568e90ad117c3de8d858beb990808a1...

Author: Paul Gofman <pgofman(a)codeweavers.com>
Date:   Fri Mar 22 21:46:31 2024 -0600

win32u: Avoid leaking previous buffer in get_buffer_space().

---

 dlls/win32u/message.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/dlls/win32u/message.c b/dlls/win32u/message.c
index 3a17c4689ff..4a368ffb589 100644
--- a/dlls/win32u/message.c
+++ b/dlls/win32u/message.c
@@ -473,7 +473,10 @@ static inline void *get_buffer_space( void **buffer, size_t size, size_t *buffer
 {
     if (*buffer_size < size)
     {
-        *buffer = malloc( size );
+        void *new;
+
+        if (!(new = realloc( *buffer, size ))) return NULL;
+        *buffer = new;
         *buffer_size = size;
     }
     return *buffer;