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| author | Eric Biggers <ebiggers@google.com> | 2020-02-25 20:59:14 -0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-03-06 12:28:22 +1100 |
| commit | 64d66793b76cd3db39137cf9fc7ebe9c2010931d (patch) | |
| tree | cbbb7583b9401a501d90b058b6284de4fa8b8aa8 | |
| parent | d1dc4df1fe21df4f83b8aa7997310480df72eddc (diff) | |
| download | linux-64d66793b76cd3db39137cf9fc7ebe9c2010931d.tar.gz linux-64d66793b76cd3db39137cf9fc7ebe9c2010931d.tar.bz2 linux-64d66793b76cd3db39137cf9fc7ebe9c2010931d.zip | |
crypto: ccm - simplify error handling in crypto_rfc4309_create()
Simplify the error handling in crypto_rfc4309_create() by taking
advantage of crypto_grab_aead() now handling an ERR_PTR() name and by
taking advantage of crypto_drop_aead() now accepting (as a no-op) a
spawn that hasn't been grabbed yet.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/ccm.c | 29 |
1 files changed, 9 insertions, 20 deletions
diff --git a/crypto/ccm.c b/crypto/ccm.c index 241ecdc5c4e0..d1fb01bbc814 100644 --- a/crypto/ccm.c +++ b/crypto/ccm.c @@ -717,7 +717,6 @@ static int crypto_rfc4309_create(struct crypto_template *tmpl, struct aead_instance *inst; struct crypto_aead_spawn *spawn; struct aead_alg *alg; - const char *ccm_name; int err; algt = crypto_get_attr_type(tb); @@ -729,19 +728,15 @@ static int crypto_rfc4309_create(struct crypto_template *tmpl, mask = crypto_requires_sync(algt->type, algt->mask); - ccm_name = crypto_attr_alg_name(tb[1]); - if (IS_ERR(ccm_name)) - return PTR_ERR(ccm_name); - inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); if (!inst) return -ENOMEM; spawn = aead_instance_ctx(inst); err = crypto_grab_aead(spawn, aead_crypto_instance(inst), - ccm_name, 0, mask); + crypto_attr_alg_name(tb[1]), 0, mask); if (err) - goto out_free_inst; + goto err_free_inst; alg = crypto_spawn_aead_alg(spawn); @@ -749,11 +744,11 @@ static int crypto_rfc4309_create(struct crypto_template *tmpl, /* We only support 16-byte blocks. */ if (crypto_aead_alg_ivsize(alg) != 16) - goto out_drop_alg; + goto err_free_inst; /* Not a stream cipher? */ if (alg->base.cra_blocksize != 1) - goto out_drop_alg; + goto err_free_inst; err = -ENAMETOOLONG; if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, @@ -762,7 +757,7 @@ static int crypto_rfc4309_create(struct crypto_template *tmpl, snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "rfc4309(%s)", alg->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME) - goto out_drop_alg; + goto err_free_inst; inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC; inst->alg.base.cra_priority = alg->base.cra_priority; @@ -786,17 +781,11 @@ static int crypto_rfc4309_create(struct crypto_template *tmpl, inst->free = crypto_rfc4309_free; err = aead_register_instance(tmpl, inst); - if (err) - goto out_drop_alg; - -out: + if (err) { +err_free_inst: + crypto_rfc4309_free(inst); + } return err; - -out_drop_alg: - crypto_drop_aead(spawn); -out_free_inst: - kfree(inst); - goto out; } static int crypto_cbcmac_digest_setkey(struct crypto_shash *parent, |