diff options
| author |   Nguyen Dinh Phi <phind.uet@gmail.com> | 2021-10-08 03:04:24 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-11 16:26:55 +0100 |
| commit | c214be981ec9815ee0010910cd94e64fb3214a65 (patch) | |
| tree | 1988fcf55aed89b00554f6affa1abafa69f154cd | |
| parent | phy: rockchip-typec: Fix unsigned comparison with less than zero (diff) | |
| download | linux-stable-c214be981ec9815ee0010910cd94e64fb3214a65.tar.xz linux-stable-c214be981ec9815ee0010910cd94e64fb3214a65.zip | |
Bluetooth: hci_sock: purge socket queues in the destruct() callback
commit 709fca500067524381e28a5f481882930eebac88 upstream.
The receive path may take the socket right before hci_sock_release(),
but it may enqueue the packets to the socket queues after the call to
skb_queue_purge(), therefore the socket can be destroyed without clear
its queues completely.
Moving these skb_queue_purge() to the hci_sock_destruct() will fix this
issue, because nothing is referencing the socket at this point.
Signed-off-by: Nguyen Dinh Phi <phind.uet@gmail.com>
Reported-by: syzbot+4c4ffd1e1094dae61035@syzkaller.appspotmail.com
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/bluetooth/hci_sock.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c index 1ad569581165..ed6fcfe62f7c 100644 --- a/net/bluetooth/hci_sock.c +++ b/net/bluetooth/hci_sock.c @@ -876,10 +876,6 @@ static int hci_sock_release(struct socket *sock) } sock_orphan(sk); - - skb_queue_purge(&sk->sk_receive_queue); - skb_queue_purge(&sk->sk_write_queue); - release_sock(sk); sock_put(sk); return 0; @@ -1980,6 +1976,12 @@ done: return err; } +static void hci_sock_destruct(struct sock *sk) +{ + skb_queue_purge(&sk->sk_receive_queue); + skb_queue_purge(&sk->sk_write_queue); +} + static const struct proto_ops hci_sock_ops = { .family = PF_BLUETOOTH, .owner = THIS_MODULE, @@ -2030,6 +2032,7 @@ static int hci_sock_create(struct net *net, struct socket *sock, int protocol, sock->state = SS_UNCONNECTED; sk->sk_state = BT_OPEN; + sk->sk_destruct = hci_sock_destruct; bt_sock_link(&hci_sk_list, sk); return 0; |