[MTD] OneNAND: Do not allow oob write past end of page

OneNAND can write oob to successive pages, but NAND
does not do that. For compatibility, disallow OneNAND
from writing past the end of the page.

Signed-off-by: Adrian Hunter <[e-mail]>
Signed-off-by: Kyungmin Park <[e-mail]>

drivers/mtd/onenand/onenand_base.c

···
 		return -EINVAL;
 	}
 
+	/* For compatibility with NAND: Do not allow write past end of page */
+	if (column + len > oobsize) {
+		DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: "
+		      "Attempt to write past end of page\n");
+		return -EINVAL;
+	}
+
 	/* Do not allow reads past end of device */
 	if (unlikely(to >= mtd->size ||
 		     column + len > ((mtd->size >> this->page_shift) -