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Revert "Bluetooth: af_bluetooth: Fix deadlock"

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This reverts commit cb8adca52f which is
commit f7b94bdc1ec107c92262716b073b3e816d4784fb upstream.

It is reported to cause regressions in the 6.1.y tree, so revert it for
now.

Link: https://lore.kernel.org/all/CADRbXaDqx6S+7tzdDPPEpRu9eDLrHQkqoWTTGfKJSRxY=hT5MQ@mail.gmail.com/
Reported-by: Jeremy Lainé <jeremy.laine@m4x.org>
Cc: Salvatore Bonaccorso <carnil@debian.org>
Cc: Mike <user.service2016@gmail.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Cc: Paul Menzel <pmenzel@molgen.mpg.de>
Cc: Pauli Virtanen <pav@iki.fi>
Cc: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman
2024-11-13 15:43:55 +01:00
parent 0337fb0928
commit 0625d7c240
1 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
net/bluetooth/af_bluetooth.c
View File

@@ -307,11 +307,14 @@ int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
if (flags & MSG_OOB)
return -EOPNOTSUPP;
lock_sock(sk);
skb = skb_recv_datagram(sk, flags, &err);
if (!skb) {
if (sk->sk_shutdown & RCV_SHUTDOWN)
err = 0;
release_sock(sk);
return err;
}
@@ -337,6 +340,8 @@ int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
skb_free_datagram(sk, skb);
release_sock(sk);
if (flags & MSG_TRUNC)
copied = skblen;
@@ -559,11 +564,10 @@ int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
if (sk->sk_state == BT_LISTEN)
return -EINVAL;
spin_lock(&sk->sk_receive_queue.lock);
lock_sock(sk);
skb = skb_peek(&sk->sk_receive_queue);
amount = skb ? skb->len : 0;
spin_unlock(&sk->sk_receive_queue.lock);
release_sock(sk);
err = put_user(amount, (int __user *)arg);
break;