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Bluetooth: L2CAP: Fix using wrong mode

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[ Upstream commit 30d5772273 ]

If user has a set to use SOCK_STREAM the socket would default to
L2CAP_MODE_ERTM which later needs to be adjusted if the destination
address is LE which doesn't support such mode.

Fixes: 15f02b9105 ("Bluetooth: L2CAP: Add initial code for Enhanced Credit Based Mode")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Luiz Augusto von Dentz 2021-12-08 15:35:48 -08:00 committed by Greg Kroah-Hartman
parent a3641f64a9
commit 79d6a406df
1 changed files with 10 additions and 2 deletions
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12
net/bluetooth/l2cap_sock.c
View file

@ -161,7 +161,11 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
break;
}
if (chan->psm && bdaddr_type_is_le(chan->src_type))
/* Use L2CAP_MODE_LE_FLOWCTL (CoC) in case of LE address and
* L2CAP_MODE_EXT_FLOWCTL (ECRED) has not been set.
*/
if (chan->psm && bdaddr_type_is_le(chan->src_type) &&
chan->mode != L2CAP_MODE_EXT_FLOWCTL)
chan->mode = L2CAP_MODE_LE_FLOWCTL;
chan->state = BT_BOUND;
@ -255,7 +259,11 @@ static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr,
return -EINVAL;
}
if (chan->psm && bdaddr_type_is_le(chan->src_type) && !chan->mode)
/* Use L2CAP_MODE_LE_FLOWCTL (CoC) in case of LE address and
* L2CAP_MODE_EXT_FLOWCTL (ECRED) has not been set.
*/
if (chan->psm && bdaddr_type_is_le(chan->src_type) &&
chan->mode != L2CAP_MODE_EXT_FLOWCTL)
chan->mode = L2CAP_MODE_LE_FLOWCTL;
l2cap_sock_init_pid(sk);