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-rw-r--r--security/keys/request_key.c32
1 files changed, 15 insertions, 17 deletions
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index 9705b1aeba5d..1f6c0940297f 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -105,7 +105,7 @@ static struct key *__request_key_construction(struct key_type *type,
struct key_construction cons;
struct timespec now;
struct key *key;
- int ret, negative;
+ int ret, negated;
/* create a key and add it to the queue */
key = key_alloc(type, description,
@@ -113,9 +113,7 @@ static struct key *__request_key_construction(struct key_type *type,
if (IS_ERR(key))
goto alloc_failed;
- write_lock(&key->lock);
- key->flags |= KEY_FLAG_USER_CONSTRUCT;
- write_unlock(&key->lock);
+ set_bit(KEY_FLAG_USER_CONSTRUCT, &key->flags);
cons.key = key;
list_add_tail(&cons.link, &key->user->consq);
@@ -130,7 +128,7 @@ static struct key *__request_key_construction(struct key_type *type,
/* if the key wasn't instantiated, then we want to give an error */
ret = -ENOKEY;
- if (!(key->flags & KEY_FLAG_INSTANTIATED))
+ if (!test_bit(KEY_FLAG_INSTANTIATED, &key->flags))
goto request_failed;
down_write(&key_construction_sem);
@@ -139,7 +137,7 @@ static struct key *__request_key_construction(struct key_type *type,
/* also give an error if the key was negatively instantiated */
check_not_negative:
- if (key->flags & KEY_FLAG_NEGATIVE) {
+ if (test_bit(KEY_FLAG_NEGATIVE, &key->flags)) {
key_put(key);
key = ERR_PTR(-ENOKEY);
}
@@ -152,24 +150,23 @@ static struct key *__request_key_construction(struct key_type *type,
* - remove from construction queue
* - mark the key as dead
*/
- negative = 0;
+ negated = 0;
down_write(&key_construction_sem);
list_del(&cons.link);
- write_lock(&key->lock);
- key->flags &= ~KEY_FLAG_USER_CONSTRUCT;
-
/* check it didn't get instantiated between the check and the down */
- if (!(key->flags & KEY_FLAG_INSTANTIATED)) {
- key->flags |= KEY_FLAG_INSTANTIATED | KEY_FLAG_NEGATIVE;
- negative = 1;
+ if (!test_bit(KEY_FLAG_INSTANTIATED, &key->flags)) {
+ set_bit(KEY_FLAG_NEGATIVE, &key->flags);
+ set_bit(KEY_FLAG_INSTANTIATED, &key->flags);
+ negated = 1;
}
- write_unlock(&key->lock);
+ clear_bit(KEY_FLAG_USER_CONSTRUCT, &key->flags);
+
up_write(&key_construction_sem);
- if (!negative)
+ if (!negated)
goto check_not_negative; /* surprisingly, the key got
* instantiated */
@@ -250,7 +247,7 @@ static struct key *request_key_construction(struct key_type *type,
for (;;) {
set_current_state(TASK_UNINTERRUPTIBLE);
- if (!(ckey->flags & KEY_FLAG_USER_CONSTRUCT))
+ if (!test_bit(KEY_FLAG_USER_CONSTRUCT, &ckey->flags))
break;
schedule();
}
@@ -339,7 +336,8 @@ int key_validate(struct key *key)
if (key) {
/* check it's still accessible */
ret = -EKEYREVOKED;
- if (key->flags & (KEY_FLAG_REVOKED | KEY_FLAG_DEAD))
+ if (test_bit(KEY_FLAG_REVOKED, &key->flags) ||
+ test_bit(KEY_FLAG_DEAD, &key->flags))
goto error;
/* check it hasn't expired */