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| author | Sunwook Eom <speed.eom@samsung.com> | 2020-04-10 12:54:19 +0900 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-04-16 16:16:38 -0400 |
| commit | ad4e80a639fc61d5ecebb03caa5cdbfb91fcebfc (patch) | |
| tree | 5bf4863ee8befc893f0b283bc5bc198f9886086e /drivers/md/dm-verity-fec.c | |
| parent | 31b22120194b5c0d460f59e0c98504de1d3f1f14 (diff) | |
| download | lwn-ad4e80a639fc61d5ecebb03caa5cdbfb91fcebfc.tar.gz lwn-ad4e80a639fc61d5ecebb03caa5cdbfb91fcebfc.zip | |
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>
Diffstat (limited to 'drivers/md/dm-verity-fec.c')
| -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 49147e634046..fb41b4f23c48 100644 --- a/drivers/md/dm-verity-fec.c +++ b/drivers/md/dm-verity-fec.c @@ -435,7 +435,7 @@ 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 |