Bluetooth: Fix invalid length check in l2cap_information_rsp()

The length check is invalid since the length varies with type of info response. This was introduced by the commit cb3b315 Because of this, l2cap info rsp is not handled and command reject is sent. > ACL data: handle 11 flags 0x02 dlen 16 L2CAP(s): Info rsp: type 2 result 0 Extended feature mask 0x00b8 Enhanced Retransmission mode Streaming mode FCS Option Fixed Channels < ACL data: handle 11 flags 0x00 dlen 10 L2CAP(s): Command rej: reason 0 Command not understood Cc: stable@vger.kernel.org Signed-off-by: Jaganath Kanakkassery <jaganath.k@samsung.com> Signed-off-by: Chan-Yeol Park <chanyeol.park@samsung.com> Acked-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Author: Jaganath Kanakkassery

net/bluetooth/l2cap_core.c

@@ -4333,7 +4333,7 @@ static inline int l2cap_information_rsp(struct l2cap_conn *conn,
 struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data;
 u16 type, result;
 
-if (cmd_len != sizeof(*rsp))
+if (cmd_len < sizeof(*rsp))
 return -EPROTO;
 
 type = __le16_to_cpu(rsp->type);