From b5eeed8cb6097c8ea660b6598d36fdbb94065a22 Mon Sep 17 00:00:00 2001 From: Malcolm Priestley Date: Sun, 31 May 2015 10:35:28 +0100 Subject: [PATCH] staging: vt6655: device_rx_srv check sk_buff is NULL There is a small chance that pRD->pRDInfo->skb could go NULL while the interrupt is processing. Put NULL check on loop to break out. Signed-off-by: Malcolm Priestley Cc: Signed-off-by: Greg Kroah-Hartman --- drivers/staging/vt6655/device_main.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c index aec3ccec2231..8dbde24eb154 100644 --- a/drivers/staging/vt6655/device_main.c +++ b/drivers/staging/vt6655/device_main.c @@ -805,6 +805,10 @@ static int device_rx_srv(struct vnt_private *pDevice, unsigned int uIdx) pRD = pRD->next) { if (works++ > 15) break; + + if (!pRD->pRDInfo->skb) + break; + if (vnt_receive_frame(pDevice, pRD)) { if (!device_alloc_rx_buf(pDevice, pRD)) { dev_err(&pDevice->pcid->dev, -- 2.30.2