From f5ff291098f70a70b344df1e388596755c3c8315 Mon Sep 17 00:00:00 2001
From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Date: Thu, 7 Oct 2021 13:26:25 -0700
Subject: [PATCH] Bluetooth: L2CAP: Fix not initializing sk_peer_pid
Git-commit: f5ff291098f70a70b344df1e388596755c3c8315
Patch-mainline: v5.17-rc1
References: git-fixes
In order to group sockets being connected using L2CAP_MODE_EXT_FLOWCTL
the pid is used but sk_peer_pid was not being initialized as it is
currently only done for af_unix.
Fixes: b48596d1dc25 ("Bluetooth: L2CAP: Add get_peer_pid callback")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
net/bluetooth/l2cap_sock.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 160c016a5dfb..4574c5cb1b59 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -172,6 +172,21 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
return err;
}
+static void l2cap_sock_init_pid(struct sock *sk)
+{
+ struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+
+ /* Only L2CAP_MODE_EXT_FLOWCTL ever need to access the PID in order to
+ * group the channels being requested.
+ */
+ if (chan->mode != L2CAP_MODE_EXT_FLOWCTL)
+ return;
+
+ spin_lock(&sk->sk_peer_lock);
+ sk->sk_peer_pid = get_pid(task_tgid(current));
+ spin_unlock(&sk->sk_peer_lock);
+}
+
static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr,
int alen, int flags)
{
@@ -243,6 +258,8 @@ static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr,
if (chan->psm && bdaddr_type_is_le(chan->src_type) && !chan->mode)
chan->mode = L2CAP_MODE_LE_FLOWCTL;
+ l2cap_sock_init_pid(sk);
+
err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid),
&la.l2_bdaddr, la.l2_bdaddr_type);
if (err)
@@ -298,6 +315,8 @@ static int l2cap_sock_listen(struct socket *sock, int backlog)
goto done;
}
+ l2cap_sock_init_pid(sk);
+
sk->sk_max_ack_backlog = backlog;
sk->sk_ack_backlog = 0;
--
2.31.1