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net: ethernet: ezchip: fix UAF in nps_enet_remove

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[ Upstream commit e4b8700e07 ]

priv is netdev private data, but it is used
after free_netdev(). It can cause use-after-free when accessing priv
pointer. So, fix it by moving free_netdev() after netif_napi_del()
call.

Fixes: 0dd0770936 ("NET: Add ezchip ethernet driver")
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pavel Skripkin 2021-06-18 19:14:31 +03:00 • committed by Greg Kroah-Hartman
commit 161f8b73da
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/ezchip/nps_enet.c
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@ -645,8 +645,8 @@ static s32 nps_enet_remove(struct platform_device *pdev)
struct nps_enet_priv *priv = netdev_priv(ndev);
unregister_netdev(ndev);
free_netdev(ndev);
netif_napi_del(&priv->napi);
free_netdev(ndev);
return 0;
}