--- xen-4.1.2/tools/libxc/xc_dom_boot.c.orig	2013-05-29 17:56:31.336771949 +0200
+++ xen-4.1.2/tools/libxc/xc_dom_boot.c	2013-05-29 17:54:38.353087947 +0200
@@ -265,7 +265,7 @@
         return rc;
 
     /* let the vm run */
-    memset(ctxt, 0, sizeof(ctxt));
+    memset(ctxt, 0, sizeof(*ctxt));
     if ( (rc = dom->arch_hooks->vcpu(dom, ctxt)) != 0 )
         return rc;
     xc_dom_unmap_all(dom);
--- xen-4.1.2/tools/blktap2/drivers/md5.c.orig	2013-05-29 18:12:16.545606480 +0200
+++ xen-4.1.2/tools/blktap2/drivers/md5.c	2013-05-29 18:11:29.410164715 +0200
@@ -174,7 +174,7 @@
     MD5Transform(ctx->buf, (uint32_t *) ctx->in);
     byteReverse((unsigned char *) ctx->buf, 4);
     memcpy(digest, ctx->buf, 16);
-    memset(ctx, 0, sizeof(ctx));     /* In case it's sensitive */
+    memset(ctx, 0, sizeof(*ctx));     /* In case it's sensitive */
 }
 
 /* The four core functions - F1 is optimized somewhat */
--- xen-4.1.2/tools/xenstat/libxenstat/src/xenstat_linux.c.orig	2013-05-29 18:13:04.107043178 +0200
+++ xen-4.1.2/tools/xenstat/libxenstat/src/xenstat_linux.c	2013-05-29 18:07:34.835942468 +0200
@@ -113,7 +113,7 @@
 
 	/* Initialize all variables called has passed as non-NULL to zeros */
 	if (iface != NULL)
-		memset(iface, 0, sizeof(iface));
+		memset(iface, 0, sizeof(*iface));
 	if (rxBytes != NULL)
 		*rxBytes = 0;
 	if (rxPackets != NULL)