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authorEric Biggers <ebiggers@google.com>2020-02-25 20:59:24 -0800
committerHerbert Xu <herbert@gondor.apana.org.au>2020-03-06 12:28:24 +1100
commit732e540953477083082e999ff553622c59cffd5f (patch)
tree9507761490dbf6d24285a7d802f2124437091251
parent0708bb435354aede92819d44563d3113c7180cf0 (diff)
downloadlinux-732e540953477083082e999ff553622c59cffd5f.tar.bz2
crypto: xts - simplify error handling in ->create()
Simplify the error handling in the XTS template's ->create() function 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/xts.c28
1 files changed, 11 insertions, 17 deletions
diff --git a/crypto/xts.c b/crypto/xts.c
index 29efa15f1495..dbdd8af629e6 100644
--- a/crypto/xts.c
+++ b/crypto/xts.c
@@ -379,15 +379,15 @@ static int create(struct crypto_template *tmpl, struct rtattr **tb)
err = -EINVAL;
if (alg->base.cra_blocksize != XTS_BLOCK_SIZE)
- goto err_drop_spawn;
+ goto err_free_inst;
if (crypto_skcipher_alg_ivsize(alg))
- goto err_drop_spawn;
+ goto err_free_inst;
err = crypto_inst_setname(skcipher_crypto_instance(inst), "xts",
&alg->base);
if (err)
- goto err_drop_spawn;
+ goto err_free_inst;
err = -EINVAL;
cipher_name = alg->base.cra_name;
@@ -400,20 +400,20 @@ static int create(struct crypto_template *tmpl, struct rtattr **tb)
len = strlcpy(ctx->name, cipher_name + 4, sizeof(ctx->name));
if (len < 2 || len >= sizeof(ctx->name))
- goto err_drop_spawn;
+ goto err_free_inst;
if (ctx->name[len - 1] != ')')
- goto err_drop_spawn;
+ goto err_free_inst;
ctx->name[len - 1] = 0;
if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
"xts(%s)", ctx->name) >= CRYPTO_MAX_ALG_NAME) {
err = -ENAMETOOLONG;
- goto err_drop_spawn;
+ goto err_free_inst;
}
} else
- 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;
@@ -437,17 +437,11 @@ static int create(struct crypto_template *tmpl, struct rtattr **tb)
inst->free = free;
err = skcipher_register_instance(tmpl, inst);
- if (err)
- goto err_drop_spawn;
-
-out:
- return err;
-
-err_drop_spawn:
- crypto_drop_skcipher(&ctx->spawn);
+ if (err) {
err_free_inst:
- kfree(inst);
- goto out;
+ free(inst);
+ }
+ return err;
}
static struct crypto_template crypto_tmpl = {