svn commit: r303301 - in stable: 10/usr.bin/bsdiff/bspatch 9/usr.bin/bsdiff/bspatch

[Xin LI]

Author: delphij
Date: Mon Jul 25 14:53:04 2016
New Revision: 303301
URL: https://svnweb.freebsd.org/changeset/base/303301

Log:
  Fix bspatch heap overflow vulnerability.
  
  Obtained from:	Chromium
  Reported by:	Lu Tung-Pin
  Security:	FreeBSD-SA-16:25.bspatch

Modified:
  stable/10/usr.bin/bsdiff/bspatch/bspatch.c

Changes in other areas also in this revision:
Modified:
  stable/9/usr.bin/bsdiff/bspatch/bspatch.c

Modified: stable/10/usr.bin/bsdiff/bspatch/bspatch.c
==============================================================================
--- stable/10/usr.bin/bsdiff/bspatch/bspatch.c	Mon Jul 25 14:52:12 2016	(r303300)
+++ stable/10/usr.bin/bsdiff/bspatch/bspatch.c	Mon Jul 25 14:53:04 2016	(r303301)
@@ -155,6 +155,10 @@ int main(int argc,char * argv[])
 		};
 
 		/* Sanity-check */
+		if ((ctrl[0] < 0) || (ctrl[1] < 0))
+			errx(1,"Corrupt patch\n");
+
+		/* Sanity-check */
 		if(newpos+ctrl[0]>newsize)
 			errx(1,"Corrupt patch\n");