stable inclusion from stable-v5.10.159 commit 296a50aa8b2982117520713edc1375777a9f8506 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAYRFL CVE: CVE-2022-48962 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... ------------------------------------------------- [ Upstream commit 4640177049549de1a43e9bc49265f0cdfce08cfd ] The skb is delivered to napi_gro_receive() which may free it, after calling this, dereferencing skb may trigger use-after-free. Fixes: 542ae60af24f ("net: hisilicon: Add Fast Ethernet MAC driver") Signed-off-by: Liu Jian <liujian56@huawei.com> Link: https://lore.kernel.org/r/20221203094240.1240211-1-liujian56@huawei.com Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Liu Jian <liujian56@huawei.com> --- drivers/net/ethernet/hisilicon/hisi_femac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/hisilicon/hisi_femac.c b/drivers/net/ethernet/hisilicon/hisi_femac.c index 57c3bc4f7089..c16dfd869363 100644 --- a/drivers/net/ethernet/hisilicon/hisi_femac.c +++ b/drivers/net/ethernet/hisilicon/hisi_femac.c @@ -283,7 +283,7 @@ static int hisi_femac_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 = (pos + 1) % rxq->num; if (rx_pkts_num >= limit) -- 2.34.1