user.exe: Clear out the thunk array to catch invalid winprocs.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=48814Signed-off-by: Alexandre Julliard <julliard@winehq.org>

user.exe: Clear out the thunk array to catch invalid winprocs.
64bd952b · Alexandre Julliard · 9bbb66fd · 64bd952b
Commit 64bd952b authored Mar 26, 2020 by Alexandre Julliard
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message.c dlls/user.exe16/message.c +2 -1

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--- a/dlls/user.exe16/message.c
+++ b/dlls/user.exe16/message.c
@@ -152,7 +152,8 @@ static WNDPROC16 alloc_win16_thunk( WNDPROC handle )
    {
        assert( MAX_WINPROCS16 * sizeof(WINPROC_THUNK) <= 0x10000 );

-        if (!(thunk_selector = GlobalAlloc16( GMEM_FIXED, MAX_WINPROCS16 * sizeof(WINPROC_THUNK) )))
+        if (!(thunk_selector = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
+                                              MAX_WINPROCS16 * sizeof(WINPROC_THUNK) )))
            return NULL;
        PrestoChangoSelector16( thunk_selector, thunk_selector );
        thunk_array = GlobalLock16( thunk_selector );