Rémi Bernon : win32u: Avoid accessing NULL key name string pointer.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ca02df5c3f16638838bff0d7f71638bc21768bca
URL:    https://gitlab.winehq.org/wine/wine/-/commit/ca02df5c3f16638838bff0d7f71638b...

Author: Rémi Bernon <rbernon(a)codeweavers.com>
Date:   Wed Aug 30 16:03:15 2023 +0200

win32u: Avoid accessing NULL key name string pointer.

---

 dlls/win32u/input.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/win32u/input.c b/dlls/win32u/input.c
index d8862beb118..f718b274176 100644
--- a/dlls/win32u/input.c
+++ b/dlls/win32u/input.c
@@ -1151,7 +1151,7 @@ INT WINAPI NtUserGetKeyNameText( LONG lparam, WCHAR *buffer, INT size )
     else key_name = kbd_tables->pKeyNamesExt;
     while (key_name->vsc && key_name->vsc != (BYTE)code) key_name++;
 
-    if (key_name->vsc == (BYTE)code)
+    if (key_name->vsc == (BYTE)code && key_name->pwsz)
     {
         len = min( size - 1, wcslen( key_name->pwsz ) );
         memcpy( buffer, key_name->pwsz, len * sizeof(WCHAR) );