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Commit bb8e6a1e authored by Amitkumar Karwar's avatar Amitkumar Karwar Committed by John W. Linville
Browse files

mwifiex: add NULL check for PCIe Rx skb 



We may get a NULL pointer here if skb allocation for Rx packet
was failed earlier.

Cc: <stable@vger.kernel.org> # 3.9+
Signed-off-by: default avatarAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: default avatarBing Zhao <bzhao@marvell.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 4f7ba432

drivers/net/wireless/mwifiex/pcie.c

+6 −0
Original line number Diff line number Diff line
@@ -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);