diff options
| author | Eric Biggers <ebiggers@google.com> | 2020-01-02 20:04:40 -0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-01-09 11:30:58 +0800 |
| commit | d4fdc2dfaa755e0bf22de6a2774cac2e5ae45cf4 (patch) | |
| tree | 18c2e44d234eaff00fbb2b9ae243d4ea69619651 | |
| parent | a24a1fd731274ebbca873000e2c7fbe8224ae4c8 (diff) | |
| download | lwn-d4fdc2dfaa755e0bf22de6a2774cac2e5ae45cf4.tar.gz lwn-d4fdc2dfaa755e0bf22de6a2774cac2e5ae45cf4.zip | |
crypto: algapi - enforce that all instances have a ->free() method
All instances need to have a ->free() method, but people could forget to
set it and then not notice if the instance is never unregistered. To
help detect this bug earlier, don't allow an instance without a ->free()
method to be registered, and complain loudly if someone tries to do it.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/aead.c | 3 | ||||
| -rw-r--r-- | crypto/ahash.c | 3 | ||||
| -rw-r--r-- | crypto/akcipher.c | 2 | ||||
| -rw-r--r-- | crypto/shash.c | 3 | ||||
| -rw-r--r-- | crypto/skcipher.c | 3 |
5 files changed, 14 insertions, 0 deletions
diff --git a/crypto/aead.c b/crypto/aead.c index 7707d3223101..16991095270d 100644 --- a/crypto/aead.c +++ b/crypto/aead.c @@ -288,6 +288,9 @@ int aead_register_instance(struct crypto_template *tmpl, { int err; + if (WARN_ON(!inst->free)) + return -EINVAL; + err = aead_prepare_alg(&inst->alg); if (err) return err; diff --git a/crypto/ahash.c b/crypto/ahash.c index cd5d9847d513..68a0f0cb75c4 100644 --- a/crypto/ahash.c +++ b/crypto/ahash.c @@ -656,6 +656,9 @@ int ahash_register_instance(struct crypto_template *tmpl, { int err; + if (WARN_ON(!inst->free)) + return -EINVAL; + err = ahash_prepare_alg(&inst->alg); if (err) return err; diff --git a/crypto/akcipher.c b/crypto/akcipher.c index eeed6c151d2f..f866085c8a4a 100644 --- a/crypto/akcipher.c +++ b/crypto/akcipher.c @@ -147,6 +147,8 @@ EXPORT_SYMBOL_GPL(crypto_unregister_akcipher); int akcipher_register_instance(struct crypto_template *tmpl, struct akcipher_instance *inst) { + if (WARN_ON(!inst->free)) + return -EINVAL; akcipher_prepare_alg(&inst->alg); return crypto_register_instance(tmpl, akcipher_crypto_instance(inst)); } diff --git a/crypto/shash.c b/crypto/shash.c index 70faf28b2d14..c075b26c2a1d 100644 --- a/crypto/shash.c +++ b/crypto/shash.c @@ -577,6 +577,9 @@ int shash_register_instance(struct crypto_template *tmpl, { int err; + if (WARN_ON(!inst->free)) + return -EINVAL; + err = shash_prepare_alg(&inst->alg); if (err) return err; diff --git a/crypto/skcipher.c b/crypto/skcipher.c index 42add1e0814f..7221def7b9a7 100644 --- a/crypto/skcipher.c +++ b/crypto/skcipher.c @@ -865,6 +865,9 @@ int skcipher_register_instance(struct crypto_template *tmpl, { int err; + if (WARN_ON(!inst->free)) + return -EINVAL; + err = skcipher_prepare_alg(&inst->alg); if (err) return err; |