diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 795a94e6b482..1a0e2207e440 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -264,6 +264,11 @@ int mtd_add_partition(struct mtd_info *parent, const char *name,
 	if (length <= 0)
 		return -EINVAL;
 
+	if (offset < 0 || offset >= (long long)parent_size)
+		return -EINVAL;
+
+	if ((u64)offset + (u64)length > parent_size)
+		return -EINVAL;
 	memset(&part, 0, sizeof(part));
 	part.name = name;
 	part.size = length;