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-rw-r--r--security/keys/process_keys.c24
1 files changed, 14 insertions, 10 deletions
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index ce8ac6073d5..212601ebaa4 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -412,10 +412,13 @@ key_ref_t search_process_keyrings(struct key_type *type,
struct task_struct *context)
{
struct request_key_auth *rka;
+ struct cred *cred;
key_ref_t key_ref, ret, err;
might_sleep();
+ cred = get_task_cred(context);
+
/* we want to return -EAGAIN or -ENOKEY if any of the keyrings were
* searchable, but we failed to find a key or we found a negative key;
* otherwise we want to return a sample error (probably -EACCES) if
@@ -428,9 +431,9 @@ key_ref_t search_process_keyrings(struct key_type *type,
err = ERR_PTR(-EAGAIN);
/* search the thread keyring first */
- if (context->cred->thread_keyring) {
+ if (cred->thread_keyring) {
key_ref = keyring_search_aux(
- make_key_ref(context->cred->thread_keyring, 1),
+ make_key_ref(cred->thread_keyring, 1),
context, type, description, match);
if (!IS_ERR(key_ref))
goto found;
@@ -495,9 +498,9 @@ key_ref_t search_process_keyrings(struct key_type *type,
}
}
/* or search the user-session keyring */
- else if (context->cred->user->session_keyring) {
+ else if (cred->user->session_keyring) {
key_ref = keyring_search_aux(
- make_key_ref(context->cred->user->session_keyring, 1),
+ make_key_ref(cred->user->session_keyring, 1),
context, type, description, match);
if (!IS_ERR(key_ref))
goto found;
@@ -519,20 +522,20 @@ key_ref_t search_process_keyrings(struct key_type *type,
* search the keyrings of the process mentioned there
* - we don't permit access to request_key auth keys via this method
*/
- if (context->cred->request_key_auth &&
+ if (cred->request_key_auth &&
context == current &&
type != &key_type_request_key_auth
) {
/* defend against the auth key being revoked */
- down_read(&context->cred->request_key_auth->sem);
+ down_read(&cred->request_key_auth->sem);
- if (key_validate(context->cred->request_key_auth) == 0) {
- rka = context->cred->request_key_auth->payload.data;
+ if (key_validate(cred->request_key_auth) == 0) {
+ rka = cred->request_key_auth->payload.data;
key_ref = search_process_keyrings(type, description,
match, rka->context);
- up_read(&context->cred->request_key_auth->sem);
+ up_read(&cred->request_key_auth->sem);
if (!IS_ERR(key_ref))
goto found;
@@ -549,7 +552,7 @@ key_ref_t search_process_keyrings(struct key_type *type,
break;
}
} else {
- up_read(&context->cred->request_key_auth->sem);
+ up_read(&cred->request_key_auth->sem);
}
}
@@ -557,6 +560,7 @@ key_ref_t search_process_keyrings(struct key_type *type,
key_ref = ret ? ret : err;
found:
+ put_cred(cred);
return key_ref;
} /* end search_process_keyrings() */