Thread (174 messages) 174 messages, 11 authors, 2021-11-25
STALE1685d

[PATCH 5.10 098/154] net: dpaa2-eth: fix use-after-free in dpaa2_eth_remove

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-11-24 14:14:15
Also in: lkml
Subsystem: dpaa2 ethernet driver, networking drivers, the rest · Maintainers: Ioana Ciornei, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds

From: Pavel Skripkin <redacted>

[ 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 <redacted>
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 f91c67489e629..a4ef35216e2f7 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -4432,10 +4432,10 @@ 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


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