Bluetooth: Linearize skbs for use in BNEP, CMTP, HIDP, and RFCOMM

Fragmented skbs are only encountered when receiving ERTM or streaming
mode L2CAP data.  BNEP, CMTP, HIDP, and RFCOMM generally use basic
mode, but they need to handle fragments without crashing.

Signed-off-by: Mat Martineau <mathewm@codeaurora.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 4 insertions, 1 deletions

diff --git a/net/bluetooth/cmtp/core.c b/net/bluetooth/cmtp/core.c
index 521baa4fe835..7d00ddf9e9dc 100644
--- a/net/bluetooth/cmtp/core.c
+++ b/net/bluetooth/cmtp/core.c
@@ -302,7 +302,10 @@ static int cmtp_session(void *arg)
 
                 while ((skb = skb_dequeue(&sk->sk_receive_queue))) {
                         skb_orphan(skb);
-                        cmtp_recv_frame(session, skb);
+                        if (!skb_linearize(skb))
+                                cmtp_recv_frame(session, skb);
+                        else
+                                kfree_skb(skb);
                 }
 
                 cmtp_process_transmit(session);