Fix coverity defects: CID 147563, 147560

coverity scan CID:147563, Type:dereference null return value
coverity scan CID:147560, Type:dereference null return value

Reviewed-by: Richard Laager <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: cao.xuewen <[email protected]>
Closes #5168 

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/libzfs/libzfs_dataset.c b/lib/libzfs/libzfs_dataset.c
index 84fe71734..6b09cb6da 100755
--- a/lib/libzfs/libzfs_dataset.c
+++ b/lib/libzfs/libzfs_dataset.c
@@ -2262,6 +2262,11 @@ zfs_get_clones_nvl(zfs_handle_t *zhp)
 			(void) strsep(&cp, "/@");
 			root = zfs_open(zhp->zfs_hdl, pool,
 			    ZFS_TYPE_FILESYSTEM);
+			if (root == NULL) {
+				nvlist_free(nv);
+				nvlist_free(value);
+				return (NULL);
+			}
 
 			(void) get_clones_cb(root, &gca);
 		}