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Date: Wed, 13 Jan 2016 11:06:41 +0800 From: Weidong Wang <wangweidong1@...wei.com> To: David Miller <davem@...emloft.net>, <nbd@...nwrt.org>, <zajec5@...il.com>, <hauke@...ke-m.de>, Joe Perches <joe@...ches.com>, <peter.senna@...il.com> CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org> Subject: bgmac: fix a missing check for build_skb when build_skb failed, it may occure a NULL pointer. So add a 'NULL check' for it. Signed-off-by: Weidong Wang <wangweidong1@...wei.com> --- drivers/net/ethernet/broadcom/bgmac.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c index 21e3c38..d75180a 100644 --- a/drivers/net/ethernet/broadcom/bgmac.c +++ b/drivers/net/ethernet/broadcom/bgmac.c @@ -466,6 +466,11 @@ static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring, len -= ETH_FCS_LEN; skb = build_skb(buf, BGMAC_RX_ALLOC_SIZE); + if (unlikely(skb)) { + bgmac_err(bgmac, "build_skb failed\n"); + put_page(virt_to_head_page(buf)); + break; + } skb_put(skb, BGMAC_RX_FRAME_OFFSET + BGMAC_RX_BUF_OFFSET + len); skb_pull(skb, BGMAC_RX_FRAME_OFFSET + -- 1.9.0
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