luck/tmp_suning_uos_patched
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Bluetooth: Stop sabotaging list poisoning

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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>
This commit is contained in:
Alexey Dobriyan 2015-06-10 20:28:33 +03:00 committed by Marcel Holtmann
parent d446278c40
commit 835a6a2f86
1 changed files with 2 additions and 6 deletions
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8
net/bluetooth/l2cap_core.c
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@ -1601,7 +1601,7 @@ int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user)
hci_dev_lock(hdev); hci_dev_lock(hdev);
if (user->list.next || user->list.prev) { if (!list_empty(&user->list)) {
ret = -EINVAL; ret = -EINVAL;
goto out_unlock; goto out_unlock;
} }
@ -1631,12 +1631,10 @@ void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user)
hci_dev_lock(hdev); hci_dev_lock(hdev);
if (!user->list.next || !user->list.prev) if (list_empty(&user->list))
goto out_unlock; goto out_unlock;
list_del(&user->list); list_del(&user->list);
user->list.next = NULL;
user->list.prev = NULL;
user->remove(conn, user); user->remove(conn, user);
out_unlock: out_unlock:
@ -1651,8 +1649,6 @@ static void l2cap_unregister_all_users(struct l2cap_conn *conn)
while (!list_empty(&conn->users)) { while (!list_empty(&conn->users)) {
user = list_first_entry(&conn->users, struct l2cap_user, list); user = list_first_entry(&conn->users, struct l2cap_user, list);
list_del(&user->list); list_del(&user->list);
user->list.next = NULL;
user->list.prev = NULL;
user->remove(conn, user); user->remove(conn, user);
} }
} }