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From: "Andrey V. Elsukov" <ae@FreeBSD.org>
Date: Tue, 28 Jun 2011 04:57:53 +0000 (UTC)
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Subject: svn commit: r223618 - stable/8/sbin/geom/class/part
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Author: ae
Date: Tue Jun 28 04:57:53 2011
New Revision: 223618
URL: http://svn.freebsd.org/changeset/base/223618

Log:
  MFC r223364:
    When user specifies the bootcode with size smaller than VTOC_BOOTSIZE,
    gpart_write_partcode_vtoc8 does access out of range of allocated memory.
    Check size of bootcode before writing it.
  
    Pointed out by:	ru

Modified:
  stable/8/sbin/geom/class/part/geom_part.c
Directory Properties:
  stable/8/sbin/geom/class/part/   (props changed)

Modified: stable/8/sbin/geom/class/part/geom_part.c
==============================================================================
--- stable/8/sbin/geom/class/part/geom_part.c	Tue Jun 28 01:32:18 2011	(r223617)
+++ stable/8/sbin/geom/class/part/geom_part.c	Tue Jun 28 04:57:53 2011	(r223618)
@@ -1187,8 +1187,11 @@ gpart_bootcode(struct gctl_req *req, uns
 			if (idx == 0)
 				errx(EXIT_FAILURE, "missing -i option");
 			gpart_write_partcode(gp, idx, partcode, partsize);
-		} else
+		} else {
+			if (partsize != VTOC_BOOTSIZE)
+				errx(EXIT_FAILURE, "invalid bootcode");
 			gpart_write_partcode_vtoc8(gp, idx, partcode);
+		}
 	} else
 		if (bootcode == NULL)
 			errx(EXIT_FAILURE, "no -b nor -p");