[PATCH 3.2 017/110] staging: vt6655: device_rx_srv check sk_buff is NULL

From: Ben Hutchings
Date: Mon Aug 10 2015 - 06:41:39 EST

3.2.71-rc1 review patch. If anyone has any objections, please let me know.


From: Malcolm Priestley <tvboxspy@xxxxxxxxx>

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@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
[bwh: Backported to 3.2: adjust context, indentation]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
drivers/staging/vt6655/device_main.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -1602,6 +1602,10 @@ static int device_rx_srv(PSDevice pDevic
// DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "pDevice->pCurrRD = %x, works = %d\n", pRD, works);
if (works++>15)
+ if (!pRD->pRDInfo->skb)
+ break;
if (device_receive_frame(pDevice, pRD)) {
if (!device_alloc_rx_buf(pDevice,pRD)) {

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