From 1edd4c2623a0b84b603ea6c8d345a90100c53e43 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 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 Signed-off-by: Greg Kroah-Hartman [bwh: Backported to 3.2: adjust context, indentation] Signed-off-by: Ben Hutchings (cherry picked from commit 35ee488df7402c0549f8329dc20690cf7fe22492) Signed-off-by: Willy Tarreau --- 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 269d1e2382b75..1680bed059b10 100644 --- a/drivers/staging/vt6655/device_main.c +++ b/drivers/staging/vt6655/device_main.c @@ -1605,6 +1605,10 @@ static int device_rx_srv(PSDevice pDevice, UINT uIdx) { // DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "pDevice->pCurrRD = %x, works = %d\n", pRD, works); if (works++>15) break; + + if (!pRD->pRDInfo->skb) + break; + if (device_receive_frame(pDevice, pRD)) { if (!device_alloc_rx_buf(pDevice,pRD)) { DBG_PRT(MSG_LEVEL_ERR, KERN_ERR -- 2.47.2