win32u: Don't allow a replaced font to be a replacement.

This is to prevent replacement loops.

win32u: Don't allow a replaced font to be a replacement.
53f6d82e · Jiajin Cui · Alexandre Julliard · 88ead398 · 53f6d82e
Commit 53f6d82e authored Aug 19, 2022 by Jiajin Cui Committed by Alexandre Julliard Aug 19, 2022
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font.c dlls/win32u/font.c +6 -0

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--- a/dlls/win32u/font.c
+++ b/dlls/win32u/font.c
@@ -903,6 +903,12 @@ static BOOL add_family_replacement( const WCHAR *new_name, const WCHAR *replace 
        return FALSE;
    }

+    if (family->replacement)
+    {
+        TRACE( "%s is replaced by another font, skipping.\n", debugstr_w(replace) );
+        return FALSE;
+    }
+
    if (!(new_family = create_family( new_name, NULL ))) return FALSE;
    new_family->replacement = family;
    family->refcount++;