diff options
| author | Sunwook Eom <speed.eom@samsung.com> | 2020-04-10 12:54:19 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2020-11-15 15:49:06 +0100 |
| commit | ae6624540ecbafaae26a9e0b97e4bc2401dbe62c (patch) | |
| tree | bdf2d8430b8732c81eece58511ef2e9857220726 | |
| parent | d09244e6a1a3b7e3fe7b8f5af8cda232b5e81bc1 (diff) | |
UPSTREAM: dm verity fec: fix hash block number in verity_fec_decode
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>
(cherry picked from commit ad4e80a639fc61d5ecebb03caa5cdbfb91fcebfc)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I2869d23628da0451a22cfec6348b89ce36ecbfbe
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
| -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 1dd667b97530..4844906c48bd 100644 --- a/drivers/md/dm-verity-fec.c +++ b/drivers/md/dm-verity-fec.c @@ -450,7 +450,7 @@ 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 |