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| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2007-05-05 13:59:23 +0200 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2007-07-18 15:52:42 +0200 |
| commit | 4ab60a0d7c92cab16f7e470f80ea039a0b174bce (patch) | |
| tree | 79510835689011701745ce1cfe0f03319a3a1e61 /drivers/mtd/ubi/kapi.c | |
| parent | UBI: fix error path in create_vtbl() (diff) | |
| download | linux-4ab60a0d7c92cab16f7e470f80ea039a0b174bce.tar.xz linux-4ab60a0d7c92cab16f7e470f80ea039a0b174bce.zip | |
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>
Diffstat (limited to 'drivers/mtd/ubi/kapi.c')
| -rw-r--r-- | drivers/mtd/ubi/kapi.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c index d352c4575c3d..14c66b48798e 100644 --- a/drivers/mtd/ubi/kapi.c +++ b/drivers/mtd/ubi/kapi.c @@ -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; |