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Commit 4ab60a0d authored by Artem Bityutskiy's avatar Artem Bityutskiy
Browse files

UBI: do not let to read too much 



In case of static volumes it is prohibited to read more data
then available.

Signed-off-by: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
parent 78d87c95

drivers/mtd/ubi/kapi.c

+8 −3
Original line number Diff line number Diff line
@@ -319,9 +319,14 @@ int ubi_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset, 
	    offset + len > vol->usable_leb_size)

		return -EINVAL;



	if (vol->vol_type == UBI_STATIC_VOLUME && lnum == vol->used_ebs - 1 &&

	if (vol->vol_type == UBI_STATIC_VOLUME) {

		if (vol->used_ebs == 0)

			/* Empty static UBI volume */

			return 0;

		if (lnum == vol->used_ebs - 1 &&

		    offset + len > vol->last_eb_bytes)

			return -EINVAL;

	}



	if (vol->upd_marker)

		return -EBADF;