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| author | Eric Biggers <ebiggers@google.com> | 2020-02-25 20:59:17 -0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-03-06 12:28:23 +1100 |
| commit | 3ff2bab82f42e05f39c77566f23ccbe5693f7982 (patch) | |
| tree | 2ac27f8a5c29602401ab835051d532124ddf3a55 | |
| parent | a108dfcff8441193565bb78c4a15bf344ce9b17e (diff) | |
| download | lwn-3ff2bab82f42e05f39c77566f23ccbe5693f7982.tar.gz lwn-3ff2bab82f42e05f39c77566f23ccbe5693f7982.zip | |
crypto: cts - simplify error handling in crypto_cts_create()
Simplify the error handling in crypto_cts_create() by taking advantage
of crypto_grab_skcipher() now handling an ERR_PTR() name and by taking
advantage of crypto_drop_skcipher() 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/cts.c | 27 |
1 files changed, 8 insertions, 19 deletions
diff --git a/crypto/cts.c b/crypto/cts.c index 48188adc8e91..5e005c4f0221 100644 --- a/crypto/cts.c +++ b/crypto/cts.c @@ -327,7 +327,6 @@ static int crypto_cts_create(struct crypto_template *tmpl, struct rtattr **tb) struct skcipher_instance *inst; struct crypto_attr_type *algt; struct skcipher_alg *alg; - const char *cipher_name; u32 mask; int err; @@ -340,10 +339,6 @@ static int crypto_cts_create(struct crypto_template *tmpl, struct rtattr **tb) mask = crypto_requires_sync(algt->type, algt->mask); - cipher_name = crypto_attr_alg_name(tb[1]); - if (IS_ERR(cipher_name)) - return PTR_ERR(cipher_name); - inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); if (!inst) return -ENOMEM; @@ -351,7 +346,7 @@ static int crypto_cts_create(struct crypto_template *tmpl, struct rtattr **tb) spawn = skcipher_instance_ctx(inst); err = crypto_grab_skcipher(spawn, skcipher_crypto_instance(inst), - cipher_name, 0, mask); + crypto_attr_alg_name(tb[1]), 0, mask); if (err) goto err_free_inst; @@ -359,15 +354,15 @@ static int crypto_cts_create(struct crypto_template *tmpl, struct rtattr **tb) err = -EINVAL; if (crypto_skcipher_alg_ivsize(alg) != alg->base.cra_blocksize) - goto err_drop_spawn; + goto err_free_inst; if (strncmp(alg->base.cra_name, "cbc(", 4)) - goto err_drop_spawn; + goto err_free_inst; err = crypto_inst_setname(skcipher_crypto_instance(inst), "cts", &alg->base); if (err) - goto err_drop_spawn; + 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; @@ -391,17 +386,11 @@ static int crypto_cts_create(struct crypto_template *tmpl, struct rtattr **tb) inst->free = crypto_cts_free; err = skcipher_register_instance(tmpl, inst); - if (err) - goto err_drop_spawn; - -out: - return err; - -err_drop_spawn: - crypto_drop_skcipher(spawn); + if (err) { err_free_inst: - kfree(inst); - goto out; + crypto_cts_free(inst); + } + return err; } static struct crypto_template crypto_cts_tmpl = { |