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authorHerbert Xu <herbert@gondor.apana.org.au>2021-10-19 21:28:02 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2021-10-29 21:04:02 +0800
commitcad439fc040efe5f4381e3a7d583c5c200dbc186 (patch)
treecaf41548f2537f6e37f080fddb39c040620e2cf5 /crypto
parent3ae88f676aa63366ffa9eebb8ae787c7e19f0c57 (diff)
downloadlinux-cad439fc040efe5f4381e3a7d583c5c200dbc186.tar.bz2
crypto: api - Do not create test larvals if manager is disabled
The delayed boot-time testing patch created a dependency loop between api.c and algapi.c because it added a crypto_alg_tested call to the former when the crypto manager is disabled. We could instead avoid creating the test larvals if the crypto manager is disabled. This avoids the dependency loop as well as saving some unnecessary work, albeit in a very unlikely case. Reported-by: Nathan Chancellor <nathan@kernel.org> Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Reported-by: kernel test robot <lkp@intel.com> Fixes: adad556efcdd ("crypto: api - Fix built-in testing dependency failures") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/algapi.c56
-rw-r--r--crypto/api.c7
2 files changed, 38 insertions, 25 deletions
diff --git a/crypto/algapi.c b/crypto/algapi.c
index 422bdca214e1..d379fd91fb7b 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -216,6 +216,32 @@ void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
}
EXPORT_SYMBOL_GPL(crypto_remove_spawns);
+static struct crypto_larval *crypto_alloc_test_larval(struct crypto_alg *alg)
+{
+ struct crypto_larval *larval;
+
+ if (!IS_ENABLED(CONFIG_CRYPTO_MANAGER))
+ return NULL;
+
+ larval = crypto_larval_alloc(alg->cra_name,
+ alg->cra_flags | CRYPTO_ALG_TESTED, 0);
+ if (IS_ERR(larval))
+ return larval;
+
+ larval->adult = crypto_mod_get(alg);
+ if (!larval->adult) {
+ kfree(larval);
+ return ERR_PTR(-ENOENT);
+ }
+
+ refcount_set(&larval->alg.cra_refcnt, 1);
+ memcpy(larval->alg.cra_driver_name, alg->cra_driver_name,
+ CRYPTO_MAX_ALG_NAME);
+ larval->alg.cra_priority = alg->cra_priority;
+
+ return larval;
+}
+
static struct crypto_larval *__crypto_register_alg(struct crypto_alg *alg)
{
struct crypto_alg *q;
@@ -250,31 +276,20 @@ static struct crypto_larval *__crypto_register_alg(struct crypto_alg *alg)
goto err;
}
- larval = crypto_larval_alloc(alg->cra_name,
- alg->cra_flags | CRYPTO_ALG_TESTED, 0);
+ larval = crypto_alloc_test_larval(alg);
if (IS_ERR(larval))
goto out;
- ret = -ENOENT;
- larval->adult = crypto_mod_get(alg);
- if (!larval->adult)
- goto free_larval;
-
- refcount_set(&larval->alg.cra_refcnt, 1);
- memcpy(larval->alg.cra_driver_name, alg->cra_driver_name,
- CRYPTO_MAX_ALG_NAME);
- larval->alg.cra_priority = alg->cra_priority;
-
list_add(&alg->cra_list, &crypto_alg_list);
- list_add(&larval->alg.cra_list, &crypto_alg_list);
+
+ if (larval)
+ list_add(&larval->alg.cra_list, &crypto_alg_list);
crypto_stats_init(alg);
out:
return larval;
-free_larval:
- kfree(larval);
err:
larval = ERR_PTR(ret);
goto out;
@@ -403,10 +418,11 @@ int crypto_register_alg(struct crypto_alg *alg)
down_write(&crypto_alg_sem);
larval = __crypto_register_alg(alg);
test_started = static_key_enabled(&crypto_boot_test_finished);
- larval->test_started = test_started;
+ if (!IS_ERR_OR_NULL(larval))
+ larval->test_started = test_started;
up_write(&crypto_alg_sem);
- if (IS_ERR(larval))
+ if (IS_ERR_OR_NULL(larval))
return PTR_ERR(larval);
if (test_started)
@@ -616,8 +632,8 @@ int crypto_register_instance(struct crypto_template *tmpl,
larval = __crypto_register_alg(&inst->alg);
if (IS_ERR(larval))
goto unlock;
-
- larval->test_started = true;
+ else if (larval)
+ larval->test_started = true;
hlist_add_head(&inst->list, &tmpl->instances);
inst->tmpl = tmpl;
@@ -626,7 +642,7 @@ unlock:
up_write(&crypto_alg_sem);
err = PTR_ERR(larval);
- if (IS_ERR(larval))
+ if (IS_ERR_OR_NULL(larval))
goto err;
crypto_wait_for_test(larval);
diff --git a/crypto/api.c b/crypto/api.c
index ee5991fe11f8..cf0869dd130b 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -167,11 +167,8 @@ void crypto_wait_for_test(struct crypto_larval *larval)
int err;
err = crypto_probing_notify(CRYPTO_MSG_ALG_REGISTER, larval->adult);
- if (err != NOTIFY_STOP) {
- if (WARN_ON(err != NOTIFY_DONE))
- goto out;
- crypto_alg_tested(larval->alg.cra_driver_name, 0);
- }
+ if (WARN_ON_ONCE(err != NOTIFY_STOP))
+ goto out;
err = wait_for_completion_killable(&larval->completion);
WARN_ON(err);