diff options
| author | Alexey Dobriyan <adobriyan@gmail.com> | 2015-06-10 20:28:33 +0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2015-06-11 02:22:54 +0300 |
| commit | 835a6a2f8603237a3e6cded5a6765090ecb06ea5 (patch) | |
| tree | 1c882aae5e672842db6f8f593f9bbd40eecea5fd | |
| parent | d446278c408bdebd4103090740ce908c5d6b5ab0 (diff) | |
| download | linux-835a6a2f8603237a3e6cded5a6765090ecb06ea5.tar.xz | |
Bluetooth: Stop sabotaging list poisoning
list_del() poisons pointers with special values, no need to overwrite them.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
| -rw-r--r-- | net/bluetooth/l2cap_core.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 07bd316d02ba..51594fb7b9e7 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -1601,7 +1601,7 @@ int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user) hci_dev_lock(hdev); - if (user->list.next || user->list.prev) { + if (!list_empty(&user->list)) { ret = -EINVAL; goto out_unlock; } @@ -1631,12 +1631,10 @@ void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user) hci_dev_lock(hdev); - if (!user->list.next || !user->list.prev) + if (list_empty(&user->list)) goto out_unlock; list_del(&user->list); - user->list.next = NULL; - user->list.prev = NULL; user->remove(conn, user); out_unlock: @@ -1651,8 +1649,6 @@ static void l2cap_unregister_all_users(struct l2cap_conn *conn) while (!list_empty(&conn->users)) { user = list_first_entry(&conn->users, struct l2cap_user, list); list_del(&user->list); - user->list.next = NULL; - user->list.prev = NULL; user->remove(conn, user); } } |