From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Pavel Andrianov <andrianov@ispras.ru>,
"David S. Miller" <davem@davemloft.net>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.4 01/20] net: pxa168_eth: Fix a potential data race in pxa168_eth_remove
Date: Fri, 9 Apr 2021 11:53:07 +0200 [thread overview]
Message-ID: <20210409095300.004646193@linuxfoundation.org> (raw)
In-Reply-To: <20210409095259.957388690@linuxfoundation.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 7ace07dad6a3..9986f88618bd 100644
--- a/drivers/net/ethernet/marvell/pxa168_eth.c
+++ b/drivers/net/ethernet/marvell/pxa168_eth.c
@@ -1577,8 +1577,8 @@ 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;
}
--
2.30.2
next prev parent reply other threads:[~2021-04-09 9:54 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-09 9:53 [PATCH 4.4 00/20] 4.4.266-rc1 review Greg Kroah-Hartman
2021-04-09 9:53 ` Greg Kroah-Hartman [this message]
2021-04-09 9:53 ` [PATCH 4.4 02/20] mISDN: fix crash in fritzpci Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 03/20] mac80211: choose first enabled channel for monitor Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 04/20] x86/build: Turn off -fcf-protection for realmode targets Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 05/20] ia64: mca: allocate early mca with GFP_ATOMIC Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 06/20] cifs: revalidate mapping when we open files for SMB1 POSIX Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 07/20] cifs: Silently ignore unknown oplock break handle Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 08/20] bpf, x86: Validate computation of branch displacements for x86-64 Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 09/20] ALSA: hda/realtek - Fix pincfg for Dell XPS 13 9370 Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 10/20] mtd: rawnand: tmio: Fix the probe error path Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 11/20] mtd: rawnand: socrates: " Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 12/20] mtd: rawnand: sharpsl: " Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 13/20] mtd: rawnand: plat_nand: " Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 14/20] mtd: rawnand: pasemi: " Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 15/20] mtd: rawnand: orion: " Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 16/20] mtd: rawnand: diskonchip: " Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 17/20] tracing: Add a vmalloc_sync_mappings() for safe measure Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 18/20] init/Kconfig: make COMPILE_TEST depend on !UML Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 19/20] init/Kconfig: make COMPILE_TEST depend on !S390 Greg Kroah-Hartman
2021-04-09 9:53 ` [PATCH 4.4 20/20] init/Kconfig: make COMPILE_TEST depend on HAS_IOMEM Greg Kroah-Hartman
2021-04-09 20:08 ` [PATCH 4.4 00/20] 4.4.266-rc1 review Guenter Roeck
2021-04-10 9:42 ` Naresh Kamboju
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