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crypto: pcrypt - Use crypto_grab_aead 

As AEAD has switched over to using frontend types, the function
crypto_init_spawn must not be used since it does not specify a
frontend type.  Otherwise it leads to a crash when the spawn is
used.

This patch fixes it by switching over to crypto_grab_aead instead.

Fixes: 5d1d65f8be ("crypto: aead - Convert top level interface to new style")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2015-05-21 15:10:58 +08:00
parent 9b8c456e08
commit 66d948e732
1 changed files with 35 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
crypto/pcrypt.c
View File

@ -60,7 +60,7 @@ static struct padata_pcrypt pdecrypt;
static struct kset *pcrypt_kset;
struct pcrypt_instance_ctx {
struct crypto_spawn spawn;
struct crypto_aead_spawn spawn;
unsigned int tfm_count;
};
@ -307,57 +307,50 @@ static void pcrypt_aead_exit_tfm(struct crypto_tfm *tfm)
crypto_free_aead(ctx->child);
}
static struct crypto_instance *pcrypt_alloc_instance(struct crypto_alg *alg)
static int pcrypt_init_instance(struct crypto_instance *inst,
struct crypto_alg *alg)
{
struct crypto_instance *inst;
struct pcrypt_instance_ctx *ctx;
int err;
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
if (!inst) {
inst = ERR_PTR(-ENOMEM);
goto out;
}
err = -ENAMETOOLONG;
if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
"pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
goto out_free_inst;
return -ENAMETOOLONG;
memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
ctx = crypto_instance_ctx(inst);
err = crypto_init_spawn(&ctx->spawn, alg, inst,
CRYPTO_ALG_TYPE_MASK);
if (err)
goto out_free_inst;
inst->alg.cra_priority = alg->cra_priority + 100;
inst->alg.cra_blocksize = alg->cra_blocksize;
inst->alg.cra_alignmask = alg->cra_alignmask;
out:
return inst;
out_free_inst:
kfree(inst);
inst = ERR_PTR(err);
goto out;
return 0;
}
static struct crypto_instance *pcrypt_alloc_aead(struct rtattr **tb,
u32 type, u32 mask)
{
struct pcrypt_instance_ctx *ctx;
struct crypto_instance *inst;
struct crypto_alg *alg;
const char *name;
int err;
alg = crypto_get_attr_alg(tb, type, (mask & CRYPTO_ALG_TYPE_MASK));
if (IS_ERR(alg))
return ERR_CAST(alg);
name = crypto_attr_alg_name(tb[1]);
if (IS_ERR(name))
return ERR_CAST(name);
inst = pcrypt_alloc_instance(alg);
if (IS_ERR(inst))
goto out_put_alg;
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
if (!inst)
return ERR_PTR(-ENOMEM);
ctx = crypto_instance_ctx(inst);
crypto_set_aead_spawn(&ctx->spawn, inst);
err = crypto_grab_aead(&ctx->spawn, name, 0, 0);
if (err)
goto out_free_inst;
alg = crypto_aead_spawn_alg(&ctx->spawn);
err = pcrypt_init_instance(inst, alg);
if (err)
goto out_drop_aead;
inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC;
inst->alg.cra_type = &crypto_aead_type;
@ -377,9 +370,15 @@ static struct crypto_instance *pcrypt_alloc_aead(struct rtattr **tb,
inst->alg.cra_aead.decrypt = pcrypt_aead_decrypt;
inst->alg.cra_aead.givencrypt = pcrypt_aead_givencrypt;
out_put_alg:
crypto_mod_put(alg);
out:
return inst;
out_drop_aead:
crypto_drop_aead(&ctx->spawn);
out_free_inst:
kfree(inst);
inst = ERR_PTR(err);
goto out;
}
static struct crypto_instance *pcrypt_alloc(struct rtattr **tb)
@ -402,7 +401,7 @@ static void pcrypt_free(struct crypto_instance *inst)
{
struct pcrypt_instance_ctx *ctx = crypto_instance_ctx(inst);
crypto_drop_spawn(&ctx->spawn);
crypto_drop_aead(&ctx->spawn);
kfree(inst);
}