mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-09-21 12:11:49 +08:00
crypto: af_alg - Decrement struct key.usage in alg_set_by_key_serial()
commit6b4b53ca0b
upstream. Calls to lookup_user_key() require a corresponding key_put() to decrement the usage counter. Once it reaches zero, we schedule key GC. Therefore decrement struct key.usage in alg_set_by_key_serial(). Fixes:7984ceb134
("crypto: af_alg - Support symmetric encryption via keyring keys") Cc: <stable@vger.kernel.org> Signed-off-by: Frederick Lawler <fred@cloudflare.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
6eac396590
commit
01474630c5
@ -320,18 +320,21 @@ static int alg_setkey_by_key_serial(struct alg_sock *ask, sockptr_t optval,
|
||||
|
||||
if (IS_ERR(ret)) {
|
||||
up_read(&key->sem);
|
||||
key_put(key);
|
||||
return PTR_ERR(ret);
|
||||
}
|
||||
|
||||
key_data = sock_kmalloc(&ask->sk, key_datalen, GFP_KERNEL);
|
||||
if (!key_data) {
|
||||
up_read(&key->sem);
|
||||
key_put(key);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
memcpy(key_data, ret, key_datalen);
|
||||
|
||||
up_read(&key->sem);
|
||||
key_put(key);
|
||||
|
||||
err = type->setkey(ask->private, key_data, key_datalen);
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user