commit 5cffc05ed5c7fea312f2822d388afc025d03c08a

Author: H.J. Lu <hjl.tools@gmail.com>

Date:   Mon Apr 27 09:57:51 2015 -0700

    Check tzspec_len == 0 in __tzfile_read

    	[BZ#18333]

    	* time/tzset.c (__tzfile_read): Check tzspec_len == 0.

--- a/time/tzfile.c

+++ b/time/tzfile.c

@@ -283,7 +283,8 @@

       if (__builtin_expect (tzspec_len == 0 || tzspec_len - 1 < num_isgmt, 0))

 	goto lose;

       tzspec_len -= num_isgmt + 1;

-      if (__builtin_expect (SIZE_MAX - total_size < tzspec_len, 0))

+      if (__builtin_expect (tzspec_len == 0

+                            || SIZE_MAX - total_size < tzspec_len, 0))

 	goto lose;

     }

   if (__builtin_expect (SIZE_MAX - total_size - tzspec_len < extra, 0))