[PATCH 5.4 060/100] net: dpaa2-eth: fix use-after-free in dpaa2_eth_remove

Greg Kroah-Hartman
2021-11-24T13:26:07Z

From: Pavel Skripkin <paskripkin@gmail.com>

[ Upstream commit 9b5a333272a48c2f8b30add7a874e46e8b26129c ]

Access to netdev after free_netdev() will cause use-after-free bug.
Move debug log before free_netdev() call to avoid it.

Fixes: 7472dd9f6499 ("staging: fsl-dpaa2/eth: Move print message")
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>
---
drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index 7af7cc7c8669a..34540e604f748 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -3616,10 +3616,10 @@ static int dpaa2_eth_remove(struct fsl_mc_device *ls_dev)

fsl_mc_portal_free(priv->mc_io);

- free_netdev(net_dev);
-
dev_dbg(net_dev->dev.parent, "Removed interface %s\n", net_dev->name);

+ free_netdev(net_dev);
+
return 0;
}

--
2.33.0