From bc1b1f8bee63966649dd5ac7d10d31a6556bf19b Mon Sep 17 00:00:00 2001 From: "Gustavo F. Padovan" Date: Tue, 11 May 2010 22:14:00 -0300 Subject: [PATCH] Bluetooth: Only check SAR bits if frame is an I-frame The SAR bits doesn't make sense for an S-frame. It doesn't use SAR. Checking SAR for a S-frames can lead to L2CAP errors, it could close the channel with an invalid packet length, since we was removing the 2 of the of any frame that match SAR start bits, without check if it is an I-frame. Signed-off-by: Gustavo F. Padovan Signed-off-by: Marcel Holtmann --- net/bluetooth/l2cap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index a9fdfe401f5..108c2f290ac 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -4117,7 +4117,7 @@ static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk skb_pull(skb, 2); len = skb->len; - if (__is_sar_start(control)) + if (__is_sar_start(control) && __is_iframe(control)) len -= 2; if (pi->fcs == L2CAP_FCS_CRC16) -- 2.41.0