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net: hisilicon: Fix potential use-after-free in hix5hd2_rx()

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[ Upstream commit 433c07a13f ]

The skb is delivered to napi_gro_receive() which may free it, after
calling this, dereferencing skb may trigger use-after-free.

Fixes: 57c5bc9ad7 ("net: hisilicon: add hix5hd2 mac driver")
Signed-off-by: Liu Jian <liujian56@huawei.com>
Link: https://lore.kernel.org/r/20221203094240.1240211-2-liujian56@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Liu Jian 2022-12-03 17:42:40 +08:00 • committed by Greg Kroah-Hartman
commit 93aaa4bb72
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
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@ -550,7 +550,7 @@ static int hix5hd2_rx(struct net_device *dev, int limit)
skb->protocol = eth_type_trans(skb, dev);
napi_gro_receive(&priv->napi, skb);
dev->stats.rx_packets++;
dev->stats.rx_bytes += skb->len;
dev->stats.rx_bytes += len;
next:
pos = dma_ring_incr(pos, RX_DESC_NUM);
}