diff options
| author | Sunwook Eom <speed.eom@samsung.com> | 2020-04-10 06:54:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-05 20:15:50 +0300 |
| commit | 74381a0cf22edda38dbb8cb492ce4d097868b195 (patch) | |
| tree | d9334a00faa3aeb381be37402d443fa9b6719e81 /drivers/md | |
| parent | 3ad04be60c18651061096d42c5056bb28a5a4ce4 (diff) | |
| download | linux-74381a0cf22edda38dbb8cb492ce4d097868b195.tar.xz | |
dm verity fec: fix hash block number in verity_fec_decode
commit ad4e80a639fc61d5ecebb03caa5cdbfb91fcebfc upstream.
The error correction data is computed as if data and hash blocks
were concatenated. But hash block number starts from v->hash_start.
So, we have to calculate hash block number based on that.
Fixes: a739ff3f543af ("dm verity: add support for forward error correction")
Cc: stable@vger.kernel.org
Signed-off-by: Sunwook Eom <speed.eom@samsung.com>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-verity-fec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-verity-fec.c b/drivers/md/dm-verity-fec.c index 285148100cde..0fe6cc3007f5 100644 --- a/drivers/md/dm-verity-fec.c +++ b/drivers/md/dm-verity-fec.c @@ -436,7 +436,7 @@ int verity_fec_decode(struct dm_verity *v, struct dm_verity_io *io, fio->level++; if (type == DM_VERITY_BLOCK_TYPE_METADATA) - block += v->data_blocks; + block = block - v->hash_start + v->data_blocks; /* * For RS(M, N), the continuous FEC data is divided into blocks of N |