GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-23 07:01:23 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

crypto: algapi - convert cra_refcnt to refcount_t

Browse source 
Reference counters should use refcount_t rather than atomic_t, since the
refcount_t implementation can prevent overflows, reducing the
exploitability of reference leak bugs.  crypto_alg.cra_refcount is a
reference counter with the usual semantics, so switch it over to
refcount_t.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2017-12-29 10:00:46 -06:00 • committed by Herbert Xu
parent 809778e02c
commit ce8614a312
6 changed files with 11 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

8
crypto/algapi.c
View file

@ -62,7 +62,7 @@ static int crypto_check_alg(struct crypto_alg *alg)
if (alg->cra_priority < 0)
return -EINVAL;
atomic_set(&alg->cra_refcnt, 1);
refcount_set(&alg->cra_refcnt, 1);
return crypto_set_driver_name(alg);
}
@ -224,7 +224,7 @@ static struct crypto_larval *__crypto_register_alg(struct crypto_alg *alg)
if (!larval->adult)
goto free_larval;
atomic_set(&larval->alg.cra_refcnt, 1);
refcount_set(&larval->alg.cra_refcnt, 1);
memcpy(larval->alg.cra_driver_name, alg->cra_driver_name,
CRYPTO_MAX_ALG_NAME);
larval->alg.cra_priority = alg->cra_priority;
@ -399,7 +399,7 @@ int crypto_unregister_alg(struct crypto_alg *alg)
if (ret)
return ret;
BUG_ON(atomic_read(&alg->cra_refcnt) != 1);
BUG_ON(refcount_read(&alg->cra_refcnt) != 1);
if (alg->cra_destroy)
alg->cra_destroy(alg);
@ -490,7 +490,7 @@ void crypto_unregister_template(struct crypto_template *tmpl)
up_write(&crypto_alg_sem);
hlist_for_each_entry_safe(inst, n, list, list) {
BUG_ON(atomic_read(&inst->alg.cra_refcnt) != 1);
BUG_ON(refcount_read(&inst->alg.cra_refcnt) != 1);
crypto_free_instance(inst);
}
crypto_remove_final(&users);