diff --git a/contrib/dlz/drivers/dlz_bdb_driver.c b/contrib/dlz/drivers/dlz_bdb_driver.c
index bde080ab16..ddfefd6d8f 100644
--- a/contrib/dlz/drivers/dlz_bdb_driver.c
+++ b/contrib/dlz/drivers/dlz_bdb_driver.c
@@ -373,8 +373,7 @@ bdb_cleanup(bdb_instance_t *db) {
 		/* save mctx for later */
 		mctx = db->mctx;
 		/* return, and detach the memory */
-		isc_mem_put(mctx, db, sizeof(bdb_instance_t));
-		isc_mem_detach(&mctx);
+		isc_mem_putanddetach(&mctx, db, sizeof(bdb_instance_t));
 	}
 }
 
diff --git a/contrib/dlz/drivers/dlz_bdbhpt_driver.c b/contrib/dlz/drivers/dlz_bdbhpt_driver.c
index 4d3d935607..03a3a3d0db 100644
--- a/contrib/dlz/drivers/dlz_bdbhpt_driver.c
+++ b/contrib/dlz/drivers/dlz_bdbhpt_driver.c
@@ -463,8 +463,7 @@ bdbhpt_cleanup(bdbhpt_instance_t *db) {
 		/* save mctx for later */
 		mctx = db->mctx;
 		/* return, and detach the memory */
-		isc_mem_put(mctx, db, sizeof(bdbhpt_instance_t));
-		isc_mem_detach(&mctx);
+		isc_mem_putanddetach(&mctx, db, sizeof(bdbhpt_instance_t));
 	}
 }
 
diff --git a/contrib/dlz/drivers/dlz_filesystem_driver.c b/contrib/dlz/drivers/dlz_filesystem_driver.c
index a3fe98dd67..c7383d5b47 100644
--- a/contrib/dlz/drivers/dlz_filesystem_driver.c
+++ b/contrib/dlz/drivers/dlz_filesystem_driver.c
@@ -936,10 +936,7 @@ fs_destroy(void *driverarg, void *dbdata)
 	mctx = cd->mctx;
 
 	/* free config data memory */
-	isc_mem_put(mctx, cd, sizeof(config_data_t));
-
-	/* detach memory from context */
-	isc_mem_detach(&mctx);
+	isc_mem_putanddetach(&mctx, cd, sizeof(config_data_t));
 }
 
 static dns_sdlzmethods_t dlz_fs_methods = {
diff --git a/contrib/dlz/drivers/dlz_stub_driver.c b/contrib/dlz/drivers/dlz_stub_driver.c
index 02d856db90..6d16f2a318 100644
--- a/contrib/dlz/drivers/dlz_stub_driver.c
+++ b/contrib/dlz/drivers/dlz_stub_driver.c
@@ -255,8 +255,7 @@ stub_dlz_destroy(void *driverarg, void *dbdata)
 	isc_mem_free(named_g_mctx, cd->myname);
 	isc_mem_free(named_g_mctx, cd->myip);
 	mctx = cd->mctx;
-	isc_mem_put(mctx, cd, sizeof(config_data_t));
-	isc_mem_detach(&mctx);
+	isc_mem_putanddetach(&mctx, cd, sizeof(config_data_t));
 }
 
 static dns_sdlzmethods_t dlz_stub_methods = {
diff --git a/contrib/dlz/drivers/sdlz_helper.c b/contrib/dlz/drivers/sdlz_helper.c
index 6eb6629245..c8708c52e8 100644
--- a/contrib/dlz/drivers/sdlz_helper.c
+++ b/contrib/dlz/drivers/sdlz_helper.c
@@ -450,8 +450,7 @@ sdlzh_destroy_sqldbinstance(dbinstance_t *dbi)
 	(void) isc_mutex_destroy(&dbi->instance_lock);
 
 	/* return, and detach the memory */
-	isc_mem_put(mctx, dbi, sizeof(dbinstance_t));
-	isc_mem_detach(&mctx);
+	isc_mem_putanddetach(&mctx, dbi, sizeof(dbinstance_t));
 }
 
 char *
diff --git a/contrib/dlz/modules/mysqldyn/dlz_mysqldyn_mod.c b/contrib/dlz/modules/mysqldyn/dlz_mysqldyn_mod.c
index f8e47f8f24..6ce095e941 100644
--- a/contrib/dlz/modules/mysqldyn/dlz_mysqldyn_mod.c
+++ b/contrib/dlz/modules/mysqldyn/dlz_mysqldyn_mod.c
@@ -669,7 +669,7 @@ make_notify(const char *zone, int *packetlen) {
 
 	/* Question */
 	packet[12] = '.';
-	memcpy(&packet[13], zone, strlen(zone));
+	memmove(&packet[13], zone, strlen(zone));
 	packet[13 + strlen(zone)] = 0;
 
 	/* Make the question into labels */
@@ -755,7 +755,7 @@ notify(mysql_data_t *state, const char *zone, int sn) {
 		if (h == NULL)
 			continue;
 
-		memcpy(&addr.sin_addr, h->h_addr, h->h_length);
+		memmove(&addr.sin_addr, h->h_addr, h->h_length);
 		addrp = &addr.sin_addr;
 
 		/* Get the address for the nameserver into a string */