diff --git a/cmd/zinject/translate.c b/cmd/zinject/translate.c
index 0264aca6fd..4127339ed1 100644
--- a/cmd/zinject/translate.c
+++ b/cmd/zinject/translate.c
@@ -219,6 +219,8 @@ calculate_range(const char *dataset, err_type_t type, int level, char *range,
 	}
 
 	switch (type) {
+	default:
+		break;
 	case TYPE_DATA:
 		break;
 
@@ -333,6 +335,8 @@ translate_record(err_type_t type, const char *object, const char *range,
 		 * MOS objects are treated specially.
 		 */
 		switch (type) {
+		default:
+			break;
 		case TYPE_MOS:
 			record->zi_type = 0;
 			break;
@@ -459,6 +463,8 @@ translate_device(const char *pool, const char *device, err_type_t label_type,
 	}
 
 	switch (label_type) {
+	default:
+		break;
 	case TYPE_LABEL_UBERBLOCK:
 		record->zi_start = offsetof(vdev_label_t, vl_uberblock[0]);
 		record->zi_end = record->zi_start + VDEV_UBERBLOCK_RING - 1;
diff --git a/lib/libzfs/libzfs_pool.c b/lib/libzfs/libzfs_pool.c
index 43dff1a8b2..d5e9538096 100644
--- a/lib/libzfs/libzfs_pool.c
+++ b/lib/libzfs/libzfs_pool.c
@@ -183,6 +183,8 @@ char *
 zpool_state_to_name(vdev_state_t state, vdev_aux_t aux)
 {
 	switch (state) {
+	default:
+		break;
 	case VDEV_STATE_CLOSED:
 	case VDEV_STATE_OFFLINE:
 		return (gettext("OFFLINE"));
@@ -419,6 +421,8 @@ zpool_valid_proplist(libzfs_handle_t *hdl, const char *poolname,
 		 * Perform additional checking for specific properties.
 		 */
 		switch (prop) {
+		default:
+			break;
 		case ZPOOL_PROP_VERSION:
 			if (intval < version || intval > SPA_VERSION) {
 				zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
@@ -711,7 +715,10 @@ zpool_name_valid(libzfs_handle_t *hdl, boolean_t isopen, const char *pool)
 				zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 				    "multiple '@' delimiters in name"));
 				break;
-
+			case NAME_ERR_NO_AT:
+				zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
+				    "permission set is missing '@'"));
+				break;
 			}
 		}
 		return (B_FALSE);
diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index b7278822bb..9589006d97 100644
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -1112,6 +1112,8 @@ arc_space_consume(uint64_t space, arc_space_type_t type)
 	ASSERT(type >= 0 && type < ARC_SPACE_NUMTYPES);
 
 	switch (type) {
+	default:
+		break;
 	case ARC_SPACE_DATA:
 		ARCSTAT_INCR(arcstat_data_size, space);
 		break;
@@ -1136,6 +1138,8 @@ arc_space_return(uint64_t space, arc_space_type_t type)
 	ASSERT(type >= 0 && type < ARC_SPACE_NUMTYPES);
 
 	switch (type) {
+	default:
+		break;
 	case ARC_SPACE_DATA:
 		ARCSTAT_INCR(arcstat_data_size, -space);
 		break;
diff --git a/module/zfs/spa.c b/module/zfs/spa.c
index 5a34ed29fd..40235da9e8 100644
--- a/module/zfs/spa.c
+++ b/module/zfs/spa.c
@@ -1054,6 +1054,8 @@ spa_check_logs(spa_t *spa)
 		(void) dmu_objset_find(spa->spa_name, zil_clear_log_chain, NULL,
 		    DS_FIND_CHILDREN);
 		break;
+	case SPA_LOG_GOOD:
+		break;
 	}
 	spa->spa_log_state = SPA_LOG_GOOD;
 	return (0);
diff --git a/module/zfs/zfs_ioctl.c b/module/zfs/zfs_ioctl.c
index 7a7bc172b2..3cdd1d8c3b 100644
--- a/module/zfs/zfs_ioctl.c
+++ b/module/zfs/zfs_ioctl.c
@@ -325,6 +325,8 @@ zfs_secpolicy_setprop(const char *name, zfs_prop_t prop, cred_t *cr)
 	 * Check permissions for special properties.
 	 */
 	switch (prop) {
+	default:
+		break;
 	case ZFS_PROP_ZONED:
 		/*
 		 * Disallow setting of 'zoned' from within a local zone.
@@ -1438,6 +1440,8 @@ zfs_set_prop_nvlist(const char *name, nvlist_t *nvl)
 		 * Check that this value is valid for this pool version
 		 */
 		switch (prop) {
+		default:
+			break;
 		case ZFS_PROP_COMPRESSION:
 			/*
 			 * If the user specified gzip compression, make sure