4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: wangweidong <[email protected]> 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 <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Amit Pundir <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/net/ethernet/broadcom/bgmac.c | 5 +++++ 1 file changed, 5 insertions(+) --- 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 bgma 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 +
