From 2bfadc170480d3bb9314eb17bab68f6d65377097 Mon Sep 17 00:00:00 2001 From: Amitkumar Karwar Date: Tue, 18 Feb 2014 15:41:55 -0800 Subject: [PATCH] mwifiex: add NULL check for PCIe Rx skb commit bb8e6a1ee881d131e404f0f1f5e8dc9281002771 upstream. We may get a NULL pointer here if skb allocation for Rx packet was failed earlier. Signed-off-by: Amitkumar Karwar Signed-off-by: Bing Zhao Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/mwifiex/pcie.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c index 03688aa14e8ad..28029b7522c21 100644 --- a/drivers/net/wireless/mwifiex/pcie.c +++ b/drivers/net/wireless/mwifiex/pcie.c @@ -1211,6 +1211,12 @@ static int mwifiex_pcie_process_recv_data(struct mwifiex_adapter *adapter) rd_index = card->rxbd_rdptr & reg->rx_mask; skb_data = card->rx_buf_list[rd_index]; + /* If skb allocation was failed earlier for Rx packet, + * rx_buf_list[rd_index] would have been left with a NULL. + */ + if (!skb_data) + return -ENOMEM; + MWIFIEX_SKB_PACB(skb_data, &buf_pa); pci_unmap_single(card->dev, buf_pa, MWIFIEX_RX_DATA_BUF_SIZE, PCI_DMA_FROMDEVICE); -- 2.47.2