Commit a407aa13 authored by Liu Jian's avatar Liu Jian
Browse files

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

stable inclusion
from stable-v4.19.269
commit 3a4eddd1cb023a71df4152fcc76092953e6fe95a
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAYRDH
CVE: CVE-2022-48960

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3a4eddd1cb023a71df4152fcc76092953e6fe95a



-------------------------------------------------

[ Upstream commit 433c07a1 ]

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

Fixes: 57c5bc9a ("net: hisilicon: add hix5hd2 mac driver")
Signed-off-by: default avatarLiu Jian <liujian56@huawei.com>
Link: https://lore.kernel.org/r/20221203094240.1240211-2-liujian56@huawei.com


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarLiu Jian <liujian56@huawei.com>
parent c6de47cf

drivers/net/ethernet/hisilicon/hix5hd2_gmac.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

	}