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| author | Eric Biggers <ebiggers@kernel.org> | 2026-02-06 07:59:23 +0300 |
|---|---|---|
| committer | Mikulas Patocka <mpatocka@redhat.com> | 2026-03-09 17:11:16 +0300 |
| commit | a7fca324d7d90f7b139d4d32747c83a629fdb446 (patch) | |
| tree | 399e7e70433981e5f78774d781978e0f6c3baf67 | |
| parent | 48640c88a8ddd482b6456fcbc084b08dd2bac083 (diff) | |
| download | linux-a7fca324d7d90f7b139d4d32747c83a629fdb446.tar.xz | |
dm-verity-fec: fix the size of dm_verity_fec_io::erasures
At most 25 entries in dm_verity_fec_io::erasures are used: the maximum
number of FEC roots plus one. Therefore, set the array size
accordingly. This reduces the size of dm_verity_fec_io by 912 bytes.
Note: a later commit introduces a constant DM_VERITY_FEC_MAX_ROOTS,
which allows the size to be more clearly expressed as
DM_VERITY_FEC_MAX_ROOTS + 1. This commit just fixes the size first.
Fixes: a739ff3f543a ("dm verity: add support for forward error correction")
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
| -rw-r--r-- | drivers/md/dm-verity-fec.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/dm-verity-fec.h b/drivers/md/dm-verity-fec.h index 35d28d9f8a9b..32ca2bfee1db 100644 --- a/drivers/md/dm-verity-fec.h +++ b/drivers/md/dm-verity-fec.h @@ -47,7 +47,8 @@ struct dm_verity_fec { /* per-bio data */ struct dm_verity_fec_io { struct rs_control *rs; /* Reed-Solomon state */ - int erasures[DM_VERITY_FEC_MAX_RSN]; /* erasures for decode_rs8 */ + /* erasures for decode_rs8 */ + int erasures[DM_VERITY_FEC_RSM - DM_VERITY_FEC_MIN_RSN + 1]; u8 *output; /* buffer for corrected output */ unsigned int level; /* recursion level */ unsigned int nbufs; /* number of buffers allocated */ |