From bedbef8ad3e75a304af6361af235302bcc61d06b Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 14 May 2024 06:39:01 +0000
Subject: [PATCH] 修改内核路径
---
kernel/net/bluetooth/l2cap_sock.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/kernel/net/bluetooth/l2cap_sock.c b/kernel/net/bluetooth/l2cap_sock.c
index d2c6785..756523e 100644
--- a/kernel/net/bluetooth/l2cap_sock.c
+++ b/kernel/net/bluetooth/l2cap_sock.c
@@ -45,6 +45,7 @@
static void l2cap_sock_init(struct sock *sk, struct sock *parent);
static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
int proto, gfp_t prio, int kern);
+static void l2cap_sock_cleanup_listen(struct sock *parent);
bool l2cap_is_socket(struct socket *sock)
{
@@ -1414,6 +1415,7 @@
if (!sk)
return 0;
+ l2cap_sock_cleanup_listen(sk);
bt_sock_unlink(&l2cap_sk_list, sk);
err = l2cap_sock_shutdown(sock, SHUT_RDWR);
@@ -1623,6 +1625,14 @@
if (!skb)
return ERR_PTR(err);
+ /* Channel lock is released before requesting new skb and then
+ * reacquired thus we need to recheck channel state.
+ */
+ if (chan->state != BT_CONNECTED) {
+ kfree_skb(skb);
+ return ERR_PTR(-ENOTCONN);
+ }
+
skb->priority = sk->sk_priority;
bt_cb(skb)->l2cap.chan = chan;
--
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