This is a note to let you know that I've just added the patch titled
Bluetooth: L2CAP: Fix handling LE modes by L2CAP_OPTIONS
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bluetooth-l2cap-fix-handling-le-modes-by-l2cap_options.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b86b0b150fed840c376145383ef5105116c81b0c Mon Sep 17 00:00:00 2001
From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
Date: Fri, 27 Mar 2020 11:32:14 -0700
Subject: Bluetooth: L2CAP: Fix handling LE modes by L2CAP_OPTIONS
From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
commit b86b0b150fed840c376145383ef5105116c81b0c upstream.
L2CAP_OPTIONS shall only be used with BR/EDR modes.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Signed-off-by: Zubin Mithra <zsm@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/bluetooth/l2cap_sock.c | 24 ++++++++++++++++++++----
1 file changed, 20 insertions(+), 4 deletions(-)
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -426,6 +426,20 @@ static int l2cap_sock_getsockopt_old(str
break;
}
+ /* Only BR/EDR modes are supported here */
+ switch (chan->mode) {
+ case L2CAP_MODE_BASIC:
+ case L2CAP_MODE_ERTM:
+ case L2CAP_MODE_STREAMING:
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+
+ if (err < 0)
+ break;
+
memset(&opts, 0, sizeof(opts));
opts.imtu = chan->imtu;
opts.omtu = chan->omtu;
@@ -685,10 +699,8 @@ static int l2cap_sock_setsockopt_old(str
break;
}
- chan->mode = opts.mode;
- switch (chan->mode) {
- case L2CAP_MODE_LE_FLOWCTL:
- break;
+ /* Only BR/EDR modes are supported here */
+ switch (opts.mode) {
case L2CAP_MODE_BASIC:
clear_bit(CONF_STATE2_DEVICE, &chan->conf_state);
break;
@@ -702,6 +714,10 @@ static int l2cap_sock_setsockopt_old(str
break;
}
+ if (err < 0)
+ break;
+
+ chan->mode = opts.mode;
chan->imtu = opts.imtu;
chan->omtu = opts.omtu;
chan->fcs = opts.fcs;
Patches currently in stable-queue which might be from luiz.von.dentz@xxxxxxxxx are
queue-5.4/bluetooth-l2cap-fix-handling-le-modes-by-l2cap_options.patch
