Fabian Maurer : win32u: Prevent use after free (Coverity).

[Alexandre Julliard]

Module: wine
Branch: master
Commit: df90a32511d44246930b426ee057318ccaa1a874
URL:    https://gitlab.winehq.org/wine/wine/-/commit/df90a32511d44246930b426ee057318...

Author: Fabian Maurer 
Date:   Wed Nov  2 04:57:33 2022 +0100

win32u: Prevent use after free (Coverity).

Signed-off-by: Fabian Maurer

---

dlls/win32u/message.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dlls/win32u/message.c b/dlls/win32u/message.c
index caffd837c8b..346ae8bede7 100644
--- a/dlls/win32u/message.c
+++ b/dlls/win32u/message.c
@@ -1368,7 +1368,6 @@ static LRESULT call_window_proc( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lpar
     call_hooks( WH_CALLWNDPROC, HC_ACTION, same_thread, (LPARAM)&cwp, sizeof(cwp) );

dispatch_win_proc_params( params, sizeof(*params) + size );
-    if (params != &p) free( params );

/* and finally the WH_CALLWNDPROCRET hook */
     cwpret.lResult = result;
@@ -1376,6 +1375,9 @@ static LRESULT call_window_proc( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lpar
     cwpret.wParam  = wparam;
     cwpret.message = msg;
     cwpret.hwnd    = params->hwnd;
+
+    if (params != &p) free( params );
+
     call_hooks( WH_CALLWNDPROCRET, HC_ACTION, same_thread, (LPARAM)&cwpret, sizeof(cwpret) );
     return result;
 }