Bluetooth: Check result code of L2CAP information response

Check result code of L2CAP information response. Otherwise
it would read invalid feature mask and access invalid memory.

Signed-off-by: Ville Tervo <ville.tervo@nokia.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 0f34e1275147..3e3cd9d4e52c 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -3348,6 +3348,15 @@ static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cm
 
         del_timer(&conn->info_timer);
 
+        if (result != L2CAP_IR_SUCCESS) {
+                conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
+                conn->info_ident = 0;
+
+                l2cap_conn_start(conn);
+
+                return 0;
+        }
+
         if (type == L2CAP_IT_FEAT_MASK) {
                 conn->feat_mask = get_unaligned_le32(rsp->data);