target/linux/generic/patches-4.4/070-v4.5-0001-bgmac-fix-a-missing-check-for-build_skb.patch

   1 From f1640c3ddeec12804bc9a21feee85fc15aca95f6 Mon Sep 17 00:00:00 2001
   2 From: wangweidong <wangweidong1@huawei.com>
   3 Date: Wed, 13 Jan 2016 11:06:41 +0800
   4 Subject: [PATCH] bgmac: fix a missing check for build_skb
   5
   6 when build_skb failed, it may occure a NULL pointer.
   7 So add a 'NULL check' for it.
   8
   9 Signed-off-by: Weidong Wang <wangweidong1@huawei.com>
  10 Signed-off-by: David S. Miller <davem@davemloft.net>
  11 ---
  12  drivers/net/ethernet/broadcom/bgmac.c | 5 +++++
  13  1 file changed, 5 insertions(+)
  14
  15 --- a/drivers/net/ethernet/broadcom/bgmac.c
  16 +++ b/drivers/net/ethernet/broadcom/bgmac.c
  17 @@ -469,6 +469,11 @@ static int bgmac_dma_rx_read(struct bgma
  18                         len -= ETH_FCS_LEN;
  19
  20                         skb = build_skb(buf, BGMAC_RX_ALLOC_SIZE);
  21 +                       if (unlikely(skb)) {
  22 +                               bgmac_err(bgmac, "build_skb failed\n");
  23 +                               put_page(virt_to_head_page(buf));
  24 +                               break;
  25 +                       }
  26                         skb_put(skb, BGMAC_RX_FRAME_OFFSET +
  27                                 BGMAC_RX_BUF_OFFSET + len);
  28                         skb_pull(skb, BGMAC_RX_FRAME_OFFSET +