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From: "Andrey A. Chernov" <ache@FreeBSD.org>
Date: Wed, 21 Sep 2016 15:47:40 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r306109 - head/lib/libc/stdtime
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Author: ache
Date: Wed Sep 21 15:47:40 2016
New Revision: 306109
URL: https://svnweb.freebsd.org/changeset/base/306109

Log:
  1) For already non-standard %z extension implement GNU compatible formats:
  +hh and -hh.
  2) Check for incorrect values for %z.
  
  MFC after:      7 days

Modified:
  head/lib/libc/stdtime/strptime.c

Modified: head/lib/libc/stdtime/strptime.c
==============================================================================
--- head/lib/libc/stdtime/strptime.c	Wed Sep 21 15:29:35 2016	(r306108)
+++ head/lib/libc/stdtime/strptime.c	Wed Sep 21 15:47:40 2016	(r306109)
@@ -582,10 +582,16 @@ label:
 					i *= 10;
 					i += *buf - '0';
 					buf++;
+				} else if (len == 2) {
+					i *= 100;
+					break;
 				} else
 					return (NULL);
 			}
 
+			if (i > 1400 || (sign == -1 && i > 1200) ||
+			    (i % 100) >= 60)
+				return (NULL);
 			tm->tm_hour -= sign * (i / 100);
 			tm->tm_min  -= sign * (i % 100);
 			*GMTp = 1;