From 873725cfa035a170cbdf7ecc80f6ec72850950a1 Mon Sep 17 00:00:00 2001
From: Pavel Skripkin <paskripkin@gmail.com>
Date: Fri, 18 Jun 2021 19:14:31 +0300
Subject: [PATCH 19/19] net: ethernet: ezchip: fix UAF in nps_enet_remove
Git-commit: e4b8700e07a86e8eab6916aa5c5ba99042c34089
Patch-mainline: v5.14-rc1
References: git-fixes
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: 0dd077093636 ("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: Denis Kirjanov <denis.kirjanov@suse.com>
---
drivers/net/ethernet/ezchip/nps_enet.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/ezchip/nps_enet.c b/drivers/net/ethernet/ezchip/nps_enet.c
index 659f1ad37e96..fbadf08b7c5d 100644
--- a/drivers/net/ethernet/ezchip/nps_enet.c
+++ b/drivers/net/ethernet/ezchip/nps_enet.c
@@ -658,8 +658,8 @@ 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;
}
--
2.16.4