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: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
parent
78d87c95b8
commit
4ab60a0d7c
@ -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 &&
|
||||
offset + len > vol->last_eb_bytes)
|
||||
return -EINVAL;
|
||||
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;
|
||||
|
Loading…
Reference in New Issue
Block a user