Nikolay Sivov : dwrite: Disallow recursing to reverse chaining substitution.
Alexandre Julliard
julliard at winehq.org
Tue Jun 9 15:27:47 CDT 2020
Module: wine
Branch: master
Commit: fb5eec2c1eb8cffaa5ee1902469735baa7b404c2
URL: https://source.winehq.org/git/wine.git/?a=commit;h=fb5eec2c1eb8cffaa5ee1902469735baa7b404c2
Author: Nikolay Sivov <nsivov at codeweavers.com>
Date: Tue Jun 9 12:14:34 2020 +0300
dwrite: Disallow recursing to reverse chaining substitution.
Signed-off-by: Nikolay Sivov <nsivov at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>
---
dlls/dwrite/opentype.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/dlls/dwrite/opentype.c b/dlls/dwrite/opentype.c
index 22ae106924..e502be1e12 100644
--- a/dlls/dwrite/opentype.c
+++ b/dlls/dwrite/opentype.c
@@ -5482,6 +5482,9 @@ static BOOL opentype_layout_apply_gsub_reverse_chain_context_substitution(struct
unsigned int offset = subtable_offset;
UINT16 glyph, format;
+ if (context->nesting_level_left != SHAPE_MAX_NESTING_LEVEL)
+ return FALSE;
+
glyph = context->u.subst.glyphs[context->cur];
format = table_read_be_word(table, offset);
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