From: Eric Biggers <ebiggers@kernel.org>
To: linux-crypto@vger.kernel.org
Subject: [PATCH 10/12] crypto: pcrypt - simplify error handling in pcrypt_create_aead()
Date: Tue, 25 Feb 2020 20:59:22 -0800 [thread overview]
Message-ID: <20200226045924.97053-11-ebiggers@kernel.org> (raw)
In-Reply-To: <20200226045924.97053-1-ebiggers@kernel.org>
From: Eric Biggers <ebiggers@google.com>
Simplify the error handling in pcrypt_create_aead() 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.
This required also making padata_free_shell() accept a NULL argument.
Signed-off-by: Eric Biggers <ebiggers@google.com>
---
crypto/pcrypt.c | 33 +++++++++------------------------
kernel/padata.c | 7 ++++---
2 files changed, 13 insertions(+), 27 deletions(-)
diff --git a/crypto/pcrypt.c b/crypto/pcrypt.c
index 1b632139a8c1a..8bddc65cd5092 100644
--- a/crypto/pcrypt.c
+++ b/crypto/pcrypt.c
@@ -232,17 +232,12 @@ static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb,
struct crypto_attr_type *algt;
struct aead_instance *inst;
struct aead_alg *alg;
- const char *name;
int err;
algt = crypto_get_attr_type(tb);
if (IS_ERR(algt))
return PTR_ERR(algt);
- name = crypto_attr_alg_name(tb[1]);
- if (IS_ERR(name))
- return PTR_ERR(name);
-
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
if (!inst)
return -ENOMEM;
@@ -252,21 +247,21 @@ static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb,
ctx = aead_instance_ctx(inst);
ctx->psenc = padata_alloc_shell(pencrypt);
if (!ctx->psenc)
- goto out_free_inst;
+ goto err_free_inst;
ctx->psdec = padata_alloc_shell(pdecrypt);
if (!ctx->psdec)
- goto out_free_psenc;
+ goto err_free_inst;
err = crypto_grab_aead(&ctx->spawn, aead_crypto_instance(inst),
- name, 0, 0);
+ crypto_attr_alg_name(tb[1]), 0, 0);
if (err)
- goto out_free_psdec;
+ goto err_free_inst;
alg = crypto_spawn_aead_alg(&ctx->spawn);
err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base);
if (err)
- goto out_drop_aead;
+ goto err_free_inst;
inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC;
@@ -286,21 +281,11 @@ static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb,
inst->free = pcrypt_free;
err = aead_register_instance(tmpl, inst);
- if (err)
- goto out_drop_aead;
-
-out:
+ if (err) {
+err_free_inst:
+ pcrypt_free(inst);
+ }
return err;
-
-out_drop_aead:
- crypto_drop_aead(&ctx->spawn);
-out_free_psdec:
- padata_free_shell(ctx->psdec);
-out_free_psenc:
- padata_free_shell(ctx->psenc);
-out_free_inst:
- kfree(inst);
- goto out;
}
static int pcrypt_create(struct crypto_template *tmpl, struct rtattr **tb)
diff --git a/kernel/padata.c b/kernel/padata.c
index 62082597d4a2a..a6afa12fb75ee 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -1038,12 +1038,13 @@ EXPORT_SYMBOL(padata_alloc_shell);
*/
void padata_free_shell(struct padata_shell *ps)
{
- struct padata_instance *pinst = ps->pinst;
+ if (!ps)
+ return;
- mutex_lock(&pinst->lock);
+ mutex_lock(&ps->pinst->lock);
list_del(&ps->list);
padata_free_pd(rcu_dereference_protected(ps->pd, 1));
- mutex_unlock(&pinst->lock);
+ mutex_unlock(&ps->pinst->lock);
kfree(ps);
}
--
2.25.1
next prev parent reply other threads:[~2020-02-26 5:01 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 4:59 [PATCH 00/12] crypto: more template instantiation cleanups Eric Biggers
2020-02-26 4:59 ` [PATCH 01/12] crypto: authencesn - fix weird comma-terminated line Eric Biggers
2020-02-26 4:59 ` [PATCH 02/12] crypto: ccm - simplify error handling in crypto_rfc4309_create() Eric Biggers
2020-02-26 4:59 ` [PATCH 03/12] crypto: cryptd - simplify error handling in cryptd_create_*() Eric Biggers
2020-02-26 4:59 ` [PATCH 04/12] crypto: ctr - simplify error handling in crypto_rfc3686_create() Eric Biggers
2020-02-26 4:59 ` [PATCH 05/12] crypto: cts - simplify error handling in crypto_cts_create() Eric Biggers
2020-02-26 4:59 ` [PATCH 06/12] crypto: gcm - simplify error handling in crypto_rfc4106_create() Eric Biggers
2020-02-26 4:59 ` [PATCH 07/12] crypto: gcm - simplify error handling in crypto_rfc4543_create() Eric Biggers
2020-02-26 4:59 ` [PATCH 08/12] crypto: geniv - simply error handling in aead_geniv_alloc() Eric Biggers
2020-02-26 4:59 ` [PATCH 09/12] crypto: lrw - simplify error handling in create() Eric Biggers
2020-02-26 4:59 ` Eric Biggers [this message]
2020-02-26 4:59 ` [PATCH 11/12] crypto: rsa-pkcs1pad - simplify error handling in pkcs1pad_create() Eric Biggers
2020-02-26 4:59 ` [PATCH 12/12] crypto: xts - simplify error handling in ->create() Eric Biggers
2020-03-06 1:51 ` [PATCH 00/12] crypto: more template instantiation cleanups Herbert Xu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200226045924.97053-11-ebiggers@kernel.org \
--to=ebiggers@kernel.org \
--cc=linux-crypto@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).