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 4.19 04/15] net: pxa168_eth: Fix a potential data race in pxa168_eth_remove
Date: Mon, 29 Mar 2021 18:23:15 -0400 [thread overview]
Message-ID: <20210329222327.2383533-4-sashal@kernel.org> (raw)
In-Reply-To: <20210329222327.2383533-1-sashal@kernel.org>
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 ff2fea0f8b75..0d6a4e47e7a5 100644
--- a/drivers/net/ethernet/marvell/pxa168_eth.c
+++ b/drivers/net/ethernet/marvell/pxa168_eth.c
@@ -1564,8 +1564,8 @@ 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 prev parent reply other threads:[~2021-03-29 22:29 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 22:23 [PATCH AUTOSEL 4.19 01/15] ARM: dts: am33xx: add aliases for mmc interfaces Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 02/15] bus: ti-sysc: Fix warning on unbind if reset is not deasserted Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 03/15] platform/x86: intel-hid: Support Lenovo ThinkPad X1 Tablet Gen 2 Sasha Levin
2021-03-29 22:23 ` Sasha Levin [this message]
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 05/15] mISDN: fix crash in fritzpci Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 06/15] mac80211: fix double free in ibss_leave Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 07/15] mac80211: choose first enabled channel for monitor Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 08/15] drm/msm: Ratelimit invalid-fence message Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 09/15] platform/x86: thinkpad_acpi: Allow the FnLock LED to change state Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 10/15] x86/build: Turn off -fcf-protection for realmode targets Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 11/15] scsi: target: pscsi: Clean up after failure in pscsi_map_sg() Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 12/15] ia64: mca: allocate early mca with GFP_ATOMIC Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 13/15] ia64: fix format strings for err_inject Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 14/15] cifs: revalidate mapping when we open files for SMB1 POSIX Sasha Levin
2021-03-29 22:23 ` [PATCH AUTOSEL 4.19 15/15] cifs: Silently ignore unknown oplock break handle Sasha Levin
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