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Subject[PATCH 1/1] mtd: nand: add check for out of page read
Date
When run mtd_oobtest case, there will be one error for step(4),
which turned out it need add one check for out of page read in
nand_do_read_oob just like mtd_do_write_oob did it already.
This commit also fix one typo error for comments in mtd_do_write_oob

Signed-off-by: Jason Liu <r64343@freescale.com>
---
drivers/mtd/nand/nand_base.c | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 1f75a1b..75d199e 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1782,6 +1782,13 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
else
len = mtd->oobsize;

+ /* Do not allow read past end of page */
+ if ((ops->ooboffs + readlen) > len) {
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt to read "
+ "past end of page\n", __func__);
+ return -EINVAL;
+ }
+
if (unlikely(ops->ooboffs >= len)) {
DEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt to start read "
"outside oob\n", __func__);
@@ -2377,7 +2384,7 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
return -EINVAL;
}

- /* Do not allow reads past end of device */
+ /* Do not allow write past end of device */
if (unlikely(to >= mtd->size ||
ops->ooboffs + ops->ooblen >
((mtd->size >> chip->page_shift) -
--
1.7.0.4



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