svn commit: r292048 - head/sbin/geom/class/multipath

[Garrett Cooper]

Author: ngie
Date: Thu Dec 10 07:04:36 2015
New Revision: 292048
URL: https://svnweb.freebsd.org/changeset/base/292048

Log:
  Don't leak rsector/sector in mp_label(..)
  
  Use calloc instead of malloc + memset(.., 0, ..) when allocating sector
  
  Differential Revision: https://reviews.freebsd.org/D4450
  MFC after: 1 week
  Reported by: cppcheck
  Reviewed by: mav
  Sponsored by: EMC / Isilon Storage Division

Modified:
  head/sbin/geom/class/multipath/geom_multipath.c

Modified: head/sbin/geom/class/multipath/geom_multipath.c
==============================================================================
--- head/sbin/geom/class/multipath/geom_multipath.c	Thu Dec 10 05:17:04 2015	(r292047)
+++ head/sbin/geom/class/multipath/geom_multipath.c	Thu Dec 10 07:04:36 2015	(r292048)
@@ -221,17 +221,15 @@ mp_label(struct gctl_req *req)
 	/*
 	 * Allocate a sector to write as metadata.
 	 */
-	sector = malloc(secsize);
+	sector = calloc(1, secsize);
 	if (sector == NULL) {
 		gctl_error(req, "unable to allocate metadata buffer");
 		return;
 	}
-	memset(sector, 0, secsize);
 	rsector = malloc(secsize);
 	if (rsector == NULL) {
-		free(sector);
 		gctl_error(req, "unable to allocate metadata buffer");
-		return;
+		goto done;
 	}
 
 	/*
@@ -246,7 +244,7 @@ mp_label(struct gctl_req *req)
 	error = g_metadata_store(name, sector, secsize);
 	if (error != 0) {
 		gctl_error(req, "cannot store metadata on %s: %s.", name, strerror(error));
-		return;
+		goto done;
 	}
 
 	/*
@@ -274,6 +272,9 @@ mp_label(struct gctl_req *req)
 			    name2, name);
 		}
 	}
+done:
+	free(rsector);
+	free(sector);
 }