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-rw-r--r--security/keys/request_key.c24
1 files changed, 17 insertions, 7 deletions
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index 03fe63e..d8c1a6a 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -68,7 +68,8 @@ static int call_sbin_request_key(struct key_construction *cons,
{
const struct cred *cred = current_cred();
key_serial_t prkey, sskey;
- struct key *key = cons->key, *authkey = cons->authkey, *keyring;
+ struct key *key = cons->key, *authkey = cons->authkey, *keyring,
+ *session;
char *argv[9], *envp[3], uid_str[12], gid_str[12];
char key_str[12], keyring_str[3][12];
char desc[20];
@@ -93,7 +94,7 @@ static int call_sbin_request_key(struct key_construction *cons,
}
/* attach the auth key to the session keyring */
- ret = __key_link(keyring, authkey);
+ ret = key_link(keyring, authkey);
if (ret < 0)
goto error_link;
@@ -112,10 +113,12 @@ static int call_sbin_request_key(struct key_construction *cons,
if (cred->tgcred->process_keyring)
prkey = cred->tgcred->process_keyring->serial;
- if (cred->tgcred->session_keyring)
- sskey = rcu_dereference(cred->tgcred->session_keyring)->serial;
- else
- sskey = cred->user->session_keyring->serial;
+ rcu_read_lock();
+ session = rcu_dereference(cred->tgcred->session_keyring);
+ if (!session)
+ session = cred->user->session_keyring;
+ sskey = session->serial;
+ rcu_read_unlock();
sprintf(keyring_str[2], "%d", sskey);
@@ -336,8 +339,10 @@ static int construct_alloc_key(struct key_type *type,
key_already_present:
mutex_unlock(&key_construction_mutex);
- if (dest_keyring)
+ if (dest_keyring) {
+ __key_link(dest_keyring, key_ref_to_ptr(key_ref));
up_write(&dest_keyring->sem);
+ }
mutex_unlock(&user->cons_lock);
key_put(key);
*_key = key = key_ref_to_ptr(key_ref);
@@ -428,6 +433,11 @@ struct key *request_key_and_link(struct key_type *type,
if (!IS_ERR(key_ref)) {
key = key_ref_to_ptr(key_ref);
+ if (dest_keyring) {
+ construct_get_dest_keyring(&dest_keyring);
+ key_link(dest_keyring, key);
+ key_put(dest_keyring);
+ }
} else if (PTR_ERR(key_ref) != -EAGAIN) {
key = ERR_CAST(key_ref);
} else {
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