ref: 10d8de7541ab1f26f6f04b2118d13a92a7119102
parent: a4df0373c71f426711fb77e3a21d4b58b7c42e66
author: Dominik Röttsches <drott@chromium.org>
date: Mon Dec 30 06:22:04 EST 2019
[truetype] Fix UBSan warning on offset to nullptr (#57501). * src/truetype/ttinterp.c (Ins_CALL): Fail if `exc->FDefs' is null.
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2020-01-02 Dominik Röttsches <drott@chromium.org>
+
+ [truetype] Fix UBSan warning on offset to nullptr (#57501).
+
+ * src/truetype/ttinterp.c (Ins_CALL): Fail if `exc->FDefs' is null.
+
2019-12-31 Nikhil Ramakrishnan <ramakrishnan.nikhil@gmail.com>
[woff2] Allow bitmap-only fonts (#57394).
--- a/src/truetype/ttinterp.c
+++ b/src/truetype/ttinterp.c
@@ -3965,6 +3965,9 @@
if ( BOUNDSL( F, exc->maxFunc + 1 ) )
goto Fail;
+ if ( !exc->FDefs )
+ goto Fail;
+
/* Except for some old Apple fonts, all functions in a TrueType */
/* font are defined in increasing order, starting from 0. This */
/* means that we normally have */