svn commit: r205330 - stable/7/lib/libc/stdio

[Jaakko Heinonen]

Author: jh
Date: Fri Mar 19 12:04:56 2010
New Revision: 205330
URL: http://svn.freebsd.org/changeset/base/205330

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/7/lib/libc/stdio/mktemp.c
Directory Properties:
  stable/7/lib/libc/   (props changed)
  stable/7/lib/libc/stdtime/   (props changed)

Modified: stable/7/lib/libc/stdio/mktemp.c
==============================================================================
--- stable/7/lib/libc/stdio/mktemp.c	Fri Mar 19 11:59:02 2010	(r205329)
+++ stable/7/lib/libc/stdio/mktemp.c	Fri Mar 19 12:04:56 2010	(r205330)
@@ -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;