staging: vt6655: device_rx_srv check sk_buff is NULL

commit b5eeed8cb6097c8ea660b6598d36fdbb94065a22 upstream.

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 <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c
index 9e0278ee003ffad1b6d3b964c4e4f5c912a4ea73..15baacb126ad1284fb14de83c60c2138ca2878f1 100644 (file)
--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -807,6 +807,10 @@ 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,