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From: Jaakko Heinonen <jh@FreeBSD.org>
Date: Fri, 12 Mar 2010 06:56:51 +0000 (UTC)
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Subject: svn commit: r205070 - stable/8/lib/libc/stdio
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Author: jh
Date: Fri Mar 12 06:56:51 2010
New Revision: 205070
URL: http://svn.freebsd.org/changeset/base/205070

Log:
  MFC r204447:
  
  In _gettemp(), check that the length of the path doesn't exceed
  MAXPATHLEN. Otherwise the path name (or part of it) may not fit to
  carrybuf causing a buffer overflow.
  
  PR:		bin/140228

Modified:
  stable/8/lib/libc/stdio/mktemp.c
Directory Properties:
  stable/8/lib/libc/   (props changed)
  stable/8/lib/libc/stdtime/   (props changed)

Modified: stable/8/lib/libc/stdio/mktemp.c
==============================================================================
--- stable/8/lib/libc/stdio/mktemp.c	Fri Mar 12 06:31:19 2010	(r205069)
+++ stable/8/lib/libc/stdio/mktemp.c	Fri Mar 12 06:56:51 2010	(r205070)
@@ -116,6 +116,10 @@ _gettemp(path, doopen, domkdir, slen)
 
 	for (trv = path; *trv != '\0'; ++trv)
 		;
+	if (trv - path >= MAXPATHLEN) {
+		errno = ENAMETOOLONG;
+		return (0);
+	}
 	trv -= slen;
 	suffp = trv;
 	--trv;