diff options
Diffstat (limited to 'drivers/md/dm-verity-target.c')
-rw-r--r-- | drivers/md/dm-verity-target.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c index 53ba0fbdf495..ce0462e751a6 100644 --- a/drivers/md/dm-verity-target.c +++ b/drivers/md/dm-verity-target.c @@ -1080,6 +1080,9 @@ static int verity_alloc_most_once(struct dm_verity *v) { struct dm_target *ti = v->ti; + if (v->validated_blocks) + return 0; + /* the bitset can only handle INT_MAX blocks */ if (v->data_blocks > INT_MAX) { ti->error = "device too large to use check_at_most_once"; @@ -1103,6 +1106,9 @@ static int verity_alloc_zero_digest(struct dm_verity *v) struct dm_verity_io *io; u8 *zero_data; + if (v->zero_digest) + return 0; + v->zero_digest = kmalloc(v->digest_size, GFP_KERNEL); if (!v->zero_digest) @@ -1537,7 +1543,7 @@ static int verity_ctr(struct dm_target *ti, unsigned int argc, char **argv) goto bad; } - /* Root hash signature is a optional parameter*/ + /* Root hash signature is an optional parameter */ r = verity_verify_root_hash(root_hash_digest_to_validate, strlen(root_hash_digest_to_validate), verify_args.sig, |