[for-4.4,12/16] bgmac: fix a missing check for build_skb

Message ID 1498801600-20896-13-git-send-email-amit.pundir@linaro.org
State New
Headers show
Series
  • Stable commits picked up from lede project
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Commit Message

Amit Pundir June 30, 2017, 5:46 a.m.
From: wangweidong <wangweidong1@huawei.com>


commit f1640c3ddeec12804bc9a21feee85fc15aca95f6 upstream.

when build_skb failed, it may occure a NULL pointer.
So add a 'NULL check' for it.

Signed-off-by: Weidong Wang <wangweidong1@huawei.com>

Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>

---
 drivers/net/ethernet/broadcom/bgmac.c | 5 +++++
 1 file changed, 5 insertions(+)

-- 
2.7.4

Patch

diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
index b56c9c581359..b7e10e1b9131 100644
--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -469,6 +469,11 @@  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 +