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| author | Mikulas Patocka <mpatocka@redhat.com> | 2023-11-28 14:50:23 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-08 08:52:16 +0100 |
| commit | 99277dd29051e2c28d865c5100e355d32803a997 (patch) | |
| tree | eba9c30b7b7ede6faa537a0b3b9aafaf93b465f9 /drivers/md/dm-verity-fec.c | |
| parent | 5368a515a37fdbc65f85d3c08374e667a40a7981 (diff) | |
| download | linux-99277dd29051e2c28d865c5100e355d32803a997.tar.gz linux-99277dd29051e2c28d865c5100e355d32803a997.tar.bz2 linux-99277dd29051e2c28d865c5100e355d32803a997.zip | |
dm-verity: align struct dm_verity_fec_io properly
commit 38bc1ab135db87577695816b190e7d6d8ec75879 upstream.
dm_verity_fec_io is placed after the end of two hash digests. If the hash
digest has unaligned length, struct dm_verity_fec_io could be unaligned.
This commit fixes the placement of struct dm_verity_fec_io, so that it's
aligned.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Fixes: a739ff3f543a ("dm verity: add support for forward error correction")
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md/dm-verity-fec.c')
| -rw-r--r-- | drivers/md/dm-verity-fec.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/dm-verity-fec.c b/drivers/md/dm-verity-fec.c index 2099c755119e..b475200d8586 100644 --- a/drivers/md/dm-verity-fec.c +++ b/drivers/md/dm-verity-fec.c @@ -24,7 +24,8 @@ bool verity_fec_is_enabled(struct dm_verity *v) */ static inline struct dm_verity_fec_io *fec_io(struct dm_verity_io *io) { - return (struct dm_verity_fec_io *) verity_io_digest_end(io->v, io); + return (struct dm_verity_fec_io *) + ((char *)io + io->v->ti->per_io_data_size - sizeof(struct dm_verity_fec_io)); } /* |