openwrt/target/linux/generic/files/drivers
Oldřich Jedlička 5e9aae9ef0 kernel: Fix off-by-one error in FIT mtd partition search.
This fixes off-by-one error introduced in commit dc76900021
("kernel: Correctly search for the FIT image in mtd partition.")

Function `mtd_read` starts reading at `offset` and
needs `hdr_len` number of bytes to be available. Suppose
the easiest case when `offset` is `0` and `hdr_len` equals
to `mtd->size` - the `for` loop will not be entered even
when enough bytes are available to be read.

Same happens for any non-zero `offset`, when `hdr_len` is
just enough bytes to be read until `mtd->size` is reached.
Imagine that for example `mtd->size=5`, `offset=4` and
`hdr_len=1`. Then `offset+hdr_len=5` and the check has to
be `offset+hdr_len <= mtd->size`, i.e. `5 <= 5`. The
check for `offset + hdr_len` value needs to be inclusive,
therefore use `<=`.

Fixes: dc76900021 ("kernel: Correctly search for the FIT image in mtd partition.")
Signed-off-by: Oldřich Jedlička <oldium.pro@gmail.com>
[adjusted commit ref, fixes tag]
Signed-off-by: Petr Štetiar <ynezz@true.cz>
(cherry picked from commit e0ce80d42a)
2019-10-09 21:05:08 +02:00
..
misc owl-loader: fix crash caused by endian patch 2019-03-06 22:02:56 +01:00
mtd kernel: Fix off-by-one error in FIT mtd partition search. 2019-10-09 21:05:08 +02:00
net/phy generic: ar8216: group MIB counters and use two basic ones only by default 2019-05-20 21:17:57 +02:00