[Git][freetype/freetype][master] [psaux] Fix integer overflow.

[Werner Lemberg]

Werner Lemberg pushed to branch master at FreeType / FreeType

Commits:

• 0636dc8a
  by Werner Lemberg at 2021-02-03T19:16:02+01:00

  [psaux] Fix integer overflow.
  
  Reported as
  
    https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=30154
  
  * src/psaux/psblues.c (cf2_blues_capture): Use `SUB_INT32`.
  

2 changed files:

• ChangeLog
• src/psaux/psblues.c

Changes:

ChangeLog

---

	1	+2021-02-03 Werner Lemberg <wl@gnu.org>
	2	+
	3	+ [psaux] Fix integer overflow.
	4	+
	5	+ Reported as
	6	+
	7	+ https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=30154
	8	+
	9	+ * src/psaux/psblues.c (cf2_blues_capture): Use `SUB_INT32`.
	10	+
1	11	2021-02-02 Alexei Podtelezhnikov <apodtele@gmail.com>
2	12
3	13	* builds/unix/configure.raw [mmap support]: Explicitly handle Windows.

src/psaux/psblues.c

---

...	...	@@ -506,7 +506,8 @@
506	506	/* guarantee minimum of 1 pixel overshoot */
507	507	dsNew = FT_MIN(
508	508	cf2_fixedRound( bottomHintEdge->dsCoord ),
509		- blues->zone[i].dsFlatEdge - cf2_intToFixed( 1 ) );
	509	+ SUB_INT32 ( blues->zone[i].dsFlatEdge,
	510	+ cf2_intToFixed( 1 ) ) );
510	511	}
511	512
512	513	else

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