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authorSweet Tea Dorminy <sweettea-kernel@dorminy.me>2023-08-17 10:15:56 -0400
committerJens Axboe <axboe@kernel.dk>2023-08-18 15:00:39 -0600
commitc984ff1423ae9f70b1f28ce811856db0d9c99021 (patch)
tree4951e9214ede8f9b1fba254c2daca9a4b8948544
parentc164c7bc9775be7bcc68754bb3431fce5823822e (diff)
blk-crypto: dynamically allocate fallback profile
blk_crypto_profile_init() calls lockdep_register_key(), which warns and does not register if the provided memory is a static object. blk-crypto-fallback currently has a static blk_crypto_profile and calls blk_crypto_profile_init() thereupon, resulting in the warning and failure to register. Fortunately it is simple enough to use a dynamically allocated profile and make lockdep function correctly. Fixes: 2fb48d88e77f ("blk-crypto: use dynamic lock class for blk_crypto_profile::lock") Cc: stable@vger.kernel.org Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me> Reviewed-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20230817141615.15387-1-sweettea-kernel@dorminy.me Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--block/blk-crypto-fallback.c36
1 files changed, 23 insertions, 13 deletions
diff --git a/block/blk-crypto-fallback.c b/block/blk-crypto-fallback.c
index ad9844c5b40c..e6468eab2681 100644
--- a/block/blk-crypto-fallback.c
+++ b/block/blk-crypto-fallback.c
@@ -78,7 +78,7 @@ static struct blk_crypto_fallback_keyslot {
struct crypto_skcipher *tfms[BLK_ENCRYPTION_MODE_MAX];
} *blk_crypto_keyslots;
-static struct blk_crypto_profile blk_crypto_fallback_profile;
+static struct blk_crypto_profile *blk_crypto_fallback_profile;
static struct workqueue_struct *blk_crypto_wq;
static mempool_t *blk_crypto_bounce_page_pool;
static struct bio_set crypto_bio_split;
@@ -292,7 +292,7 @@ static bool blk_crypto_fallback_encrypt_bio(struct bio **bio_ptr)
* Get a blk-crypto-fallback keyslot that contains a crypto_skcipher for
* this bio's algorithm and key.
*/
- blk_st = blk_crypto_get_keyslot(&blk_crypto_fallback_profile,
+ blk_st = blk_crypto_get_keyslot(blk_crypto_fallback_profile,
bc->bc_key, &slot);
if (blk_st != BLK_STS_OK) {
src_bio->bi_status = blk_st;
@@ -395,7 +395,7 @@ static void blk_crypto_fallback_decrypt_bio(struct work_struct *work)
* Get a blk-crypto-fallback keyslot that contains a crypto_skcipher for
* this bio's algorithm and key.
*/
- blk_st = blk_crypto_get_keyslot(&blk_crypto_fallback_profile,
+ blk_st = blk_crypto_get_keyslot(blk_crypto_fallback_profile,
bc->bc_key, &slot);
if (blk_st != BLK_STS_OK) {
bio->bi_status = blk_st;
@@ -499,7 +499,7 @@ bool blk_crypto_fallback_bio_prep(struct bio **bio_ptr)
return false;
}
- if (!__blk_crypto_cfg_supported(&blk_crypto_fallback_profile,
+ if (!__blk_crypto_cfg_supported(blk_crypto_fallback_profile,
&bc->bc_key->crypto_cfg)) {
bio->bi_status = BLK_STS_NOTSUPP;
return false;
@@ -526,7 +526,7 @@ bool blk_crypto_fallback_bio_prep(struct bio **bio_ptr)
int blk_crypto_fallback_evict_key(const struct blk_crypto_key *key)
{
- return __blk_crypto_evict_key(&blk_crypto_fallback_profile, key);
+ return __blk_crypto_evict_key(blk_crypto_fallback_profile, key);
}
static bool blk_crypto_fallback_inited;
@@ -534,7 +534,6 @@ static int blk_crypto_fallback_init(void)
{
int i;
int err;
- struct blk_crypto_profile *profile = &blk_crypto_fallback_profile;
if (blk_crypto_fallback_inited)
return 0;
@@ -545,18 +544,27 @@ static int blk_crypto_fallback_init(void)
if (err)
goto out;
- err = blk_crypto_profile_init(profile, blk_crypto_num_keyslots);
- if (err)
+ /* Dynamic allocation is needed because of lockdep_register_key(). */
+ blk_crypto_fallback_profile =
+ kzalloc(sizeof(*blk_crypto_fallback_profile), GFP_KERNEL);
+ if (!blk_crypto_fallback_profile) {
+ err = -ENOMEM;
goto fail_free_bioset;
+ }
+
+ err = blk_crypto_profile_init(blk_crypto_fallback_profile,
+ blk_crypto_num_keyslots);
+ if (err)
+ goto fail_free_profile;
err = -ENOMEM;
- profile->ll_ops = blk_crypto_fallback_ll_ops;
- profile->max_dun_bytes_supported = BLK_CRYPTO_MAX_IV_SIZE;
+ blk_crypto_fallback_profile->ll_ops = blk_crypto_fallback_ll_ops;
+ blk_crypto_fallback_profile->max_dun_bytes_supported = BLK_CRYPTO_MAX_IV_SIZE;
/* All blk-crypto modes have a crypto API fallback. */
for (i = 0; i < BLK_ENCRYPTION_MODE_MAX; i++)
- profile->modes_supported[i] = 0xFFFFFFFF;
- profile->modes_supported[BLK_ENCRYPTION_MODE_INVALID] = 0;
+ blk_crypto_fallback_profile->modes_supported[i] = 0xFFFFFFFF;
+ blk_crypto_fallback_profile->modes_supported[BLK_ENCRYPTION_MODE_INVALID] = 0;
blk_crypto_wq = alloc_workqueue("blk_crypto_wq",
WQ_UNBOUND | WQ_HIGHPRI |
@@ -597,7 +605,9 @@ fail_free_keyslots:
fail_free_wq:
destroy_workqueue(blk_crypto_wq);
fail_destroy_profile:
- blk_crypto_profile_destroy(profile);
+ blk_crypto_profile_destroy(blk_crypto_fallback_profile);
+fail_free_profile:
+ kfree(blk_crypto_fallback_profile);
fail_free_bioset:
bioset_exit(&crypto_bio_split);
out: