From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Pavel Andrianov <andrianov@ispras.ru>,
"David S . Miller" <davem@davemloft.net>,
Sasha Levin <sashal@kernel.org>,
netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.9 01/10] net: pxa168_eth: Fix a potential data race in pxa168_eth_remove
Date: Mon, 29 Mar 2021 18:23:52 -0400 [thread overview]
Message-ID: <20210329222401.2383930-1-sashal@kernel.org> (raw)
From: Pavel Andrianov <andrianov@ispras.ru>
[ Upstream commit 0571a753cb07982cc82f4a5115e0b321da89e1f3 ]
pxa168_eth_remove() firstly calls unregister_netdev(),
then cancels a timeout work. unregister_netdev() shuts down a device
interface and removes it from the kernel tables. If the timeout occurs
in parallel, the timeout work (pxa168_eth_tx_timeout_task) performs stop
and open of the device. It may lead to an inconsistent state and memory
leaks.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Pavel Andrianov <andrianov@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/marvell/pxa168_eth.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/marvell/pxa168_eth.c b/drivers/net/ethernet/marvell/pxa168_eth.c
index 5d5000c8edf1..09cb0ac701e1 100644
--- a/drivers/net/ethernet/marvell/pxa168_eth.c
+++ b/drivers/net/ethernet/marvell/pxa168_eth.c
@@ -1571,8 +1571,8 @@ static int pxa168_eth_remove(struct platform_device *pdev)
mdiobus_unregister(pep->smi_bus);
mdiobus_free(pep->smi_bus);
- unregister_netdev(dev);
cancel_work_sync(&pep->tx_timeout_task);
+ unregister_netdev(dev);
free_netdev(dev);
return 0;
}
--
2.30.1
next reply other threads:[~2021-03-29 22:31 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 22:23 Sasha Levin [this message]
2021-03-29 22:23 ` [PATCH AUTOSEL 4.9 02/10] mISDN: fix crash in fritzpci Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.9 03/10] mac80211: fix double free in ibss_leave Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.9 04/10] mac80211: choose first enabled channel for monitor Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.9 05/10] drm/msm: Ratelimit invalid-fence message Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.9 06/10] x86/build: Turn off -fcf-protection for realmode targets Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.9 07/10] scsi: target: pscsi: Clean up after failure in pscsi_map_sg() Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.9 08/10] ia64: mca: allocate early mca with GFP_ATOMIC Sasha Levin
2021-03-29 22:24 ` [PATCH AUTOSEL 4.9 09/10] cifs: revalidate mapping when we open files for SMB1 POSIX Sasha Levin
2021-03-29 22:24 ` [PATCH AUTOSEL 4.9 10/10] cifs: Silently ignore unknown oplock break handle Sasha Levin
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