---

yaml
---
r: 231721
b: refs/heads/master
c: 154bf89
h: refs/heads/master
i:
  231719: 1ff8d0c
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 52d039fdaa78c5a9f9bc2940ad58d7ed76b8336d
+refs/heads/master: 154bf89f5e3e3dc59666926f27ca4a0866f39157

trunk/drivers/mtd/mtdpart.c

@@ -120,8 +120,25 @@ static int part_read_oob(struct mtd_info *mtd, loff_t from,
 		return -EINVAL;
 	if (ops->datbuf && from + ops->len > mtd->size)
 		return -EINVAL;
-	res = part->master->read_oob(part->master, from + part->offset, ops);
 
+	/*
+	 * If OOB is also requested, make sure that we do not read past the end
+	 * of this partition.
+	 */
+	if (ops->oobbuf) {
+		size_t len, pages;
+
+		if (ops->mode == MTD_OOB_AUTO)
+			len = mtd->oobavail;
+		else
+			len = mtd->oobsize;
+		pages = mtd_div_by_ws(mtd->size, mtd);
+		pages -= mtd_div_by_ws(from, mtd);
+		if (ops->ooboffs + ops->ooblen > pages * len)
+			return -EINVAL;
+	}
+
+	res = part->master->read_oob(part->master, from + part->offset, ops);
 	if (unlikely(res)) {
 		if (res == -EUCLEAN)
 			mtd->ecc_stats.corrected++;