Import zlib 1.2.8 with local change merged in.

[deliverable/binutils-gdb.git] / zlib / contrib / puff / puff.c

diff --git a/zlib/contrib/puff/puff.c b/zlib/contrib/puff/puff.c
index df8470c937351db3f04d7edcd399ff5182d538ad..ba58483d570c412fd6a5989dbb4fb27e83d7ddc1 100644 (file)
--- a/zlib/contrib/puff/puff.c
+++ b/zlib/contrib/puff/puff.c
@@ -1,8 +1,8 @@
 /*
  * puff.c
- * Copyright (C) 2002-2010 Mark Adler
+ * Copyright (C) 2002-2013 Mark Adler
  * For conditions of distribution and use, see copyright notice in puff.h
- * version 2.2, 25 Apr 2010
+ * version 2.3, 21 Jan 2013
  *
  * puff.c is a simple inflate written to be an unambiguous way to specify the
  * deflate format.  It is not written for speed but rather simplicity.  As a
@@ -76,6 +76,7 @@
  *                      - Move NIL to puff.h
  *                      - Allow incomplete code only if single code length is 1
  *                      - Add full code coverage test to Makefile
+ * 2.3  21 Jan 2013     - Check for invalid code length codes in dynamic blocks
  */
 
 #include <setjmp.h>             /* for setjmp(), longjmp(), and jmp_buf */
@@ -704,6 +705,8 @@ local int dynamic(struct state *s)
         int len;                /* last length to repeat */
 
         symbol = decode(s, &lencode);
+        if (symbol < 0)
+            return symbol;          /* invalid symbol */
         if (symbol < 16)                /* length in 0..15 */
             lengths[index++] = symbol;
         else {                          /* repeat instruction */