From: Grigori Goronzy <greg@chown.ath.cx>
Date: Tue, 4 Oct 2016 00:35:26 +0000 (+0200)
Subject: shaper: fix reallocation
X-Git-Tag: 0.13.4~5
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=aa54e0b59200a994d50a346b5d7ac818ebcf2d4b;p=libass

shaper: fix reallocation

Update the variable that tracks the allocated size. This potentially
improves performance and avoid some side effects, which lead to
undefined behavior in some cases.

Fixes fuzzer test case id:000051,sig:11,sync:fuzzer3,src:004221.
---

diff --git a/libass/ass_shaper.c b/libass/ass_shaper.c
index 2707b23..5f24c5a 100644
--- a/libass/ass_shaper.c
+++ b/libass/ass_shaper.c
@@ -100,6 +100,7 @@ static bool check_allocations(ASS_Shaper *shaper, size_t new_size)
             !ASS_REALLOC_ARRAY(shaper->emblevels, new_size) ||
             !ASS_REALLOC_ARRAY(shaper->cmap, new_size))
             return false;
+        shaper->n_glyphs = new_size;
     }
     return true;
 }