From 8b706884eac958ec16518315053f77e052627084 Mon Sep 17 00:00:00 2001 From: Christophe Ricard Date: Fri, 14 Aug 2015 22:33:36 +0200 Subject: [PATCH] nfc: st-nci: Free data with irrelevant NDLC PCB_SYNC value PCB_SYNC different than PCB_TYPE_SUPERVISOR or PCB_TYPE_DATAFRAME should be discarded. Irrelevant data may be forwarded up to the ndlc state machine by phys like spi to prevent missing potential data during "write" transactions. Cc: stable@vger.kernel.org Signed-off-by: Christophe Ricard Signed-off-by: Samuel Ortiz --- drivers/nfc/st-nci/ndlc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/nfc/st-nci/ndlc.c b/drivers/nfc/st-nci/ndlc.c index bb08b16f45cf..4f51649d0e75 100644 --- a/drivers/nfc/st-nci/ndlc.c +++ b/drivers/nfc/st-nci/ndlc.c @@ -198,8 +198,10 @@ static void llt_ndlc_rcv_queue(struct llt_ndlc *ndlc) kfree_skb(skb); break; } - } else { + } else if ((pcb & PCB_TYPE_MASK) == PCB_TYPE_DATAFRAME) { nci_recv_frame(ndlc->ndev, skb); + } else { + kfree_skb(skb); } } } -- 2.39.5