diff --git a/fs/ntfs/attrib.c b/fs/ntfs/attrib.c
index 1cd6664567ce..dd8828098511 100644
--- a/fs/ntfs/attrib.c
+++ b/fs/ntfs/attrib.c
@@ -589,6 +589,8 @@ static u32 ntfs_resident_attr_min_value_length(const __le32 type)
 			sizeof(__le16) * 1;
 	case AT_VOLUME_INFORMATION:
 		return sizeof(struct volume_information);
+	case AT_INDEX_ROOT:
+		return sizeof(struct index_root);
 	case AT_EA_INFORMATION:
 		return sizeof(struct ea_information);
 	default:
@@ -632,6 +634,31 @@ static bool ntfs_volume_name_attr_value_is_valid(const u32 value_length)
 	return value_length <= NTFS_MAX_LABEL_LEN * sizeof(__le16);
 }
 
+static bool ntfs_index_root_attr_value_is_valid(const u8 *value, const u32 value_length)
+{
+	const struct index_root *ir;
+	u32 index_size;
+	u32 entries_offset;
+	u32 index_length;
+	u32 allocated_size;
+
+	ir = (const struct index_root *)value;
+	index_size = value_length - offsetof(struct index_root, index);
+	entries_offset = le32_to_cpu(ir->index.entries_offset);
+	index_length = le32_to_cpu(ir->index.index_length);
+	allocated_size = le32_to_cpu(ir->index.allocated_size);
+
+	if ((entries_offset | index_length | allocated_size) & 7 ||
+	    entries_offset < sizeof(struct index_header) ||
+	    entries_offset > index_length ||
+	    index_length > allocated_size ||
+	    allocated_size > index_size ||
+	    index_length - entries_offset < sizeof(struct index_entry_header))
+		return false;
+
+	return true;
+}
+
 struct ntfs_resident_attr_value {
 	const u8 *data;
 	u32 len;
@@ -705,6 +732,10 @@ static bool ntfs_attr_value_is_valid(struct ntfs_volume *vol,
 		if (!ntfs_volume_name_attr_value_is_valid(value.len))
 			goto corrupt;
 		break;
+	case AT_INDEX_ROOT:
+		if (!ntfs_index_root_attr_value_is_valid(value.data, value.len))
+			goto corrupt;
+		break;
 	}
 	return true;