diff options
| author | Zheng Wang <zyytlz.wz@163.com> | 2023-03-18 16:16:35 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-30 12:57:49 +0100 |
| commit | 697f92f8317e538d8409a0c95d6370eb40b34c05 (patch) | |
| tree | 53c54f7b3a3868a482a1d3985268d35536880c75 /drivers/message | |
| parent | f748e15253833b771acbede14ea98f50831ac289 (diff) | |
scsi: message: mptlan: Fix use after free bug in mptlan_remove() due to race condition
[ Upstream commit f486893288f3e9b171b836f43853a6426515d800 ]
mptlan_probe() calls mpt_register_lan_device() which initializes the
&priv->post_buckets_task workqueue. A call to
mpt_lan_wake_post_buckets_task() will subsequently start the work.
During driver unload in mptlan_remove() the following race may occur:
CPU0 CPU1
|mpt_lan_post_receive_buckets_work()
mptlan_remove() |
free_netdev() |
kfree(dev); |
|
| dev->mtu
| //use
Fix this by finishing the work prior to cleaning up in mptlan_remove().
[mkp: we really should remove mptlan instead of attempting to fix it]
Signed-off-by: Zheng Wang <zyytlz.wz@163.com>
Link: https://lore.kernel.org/r/20230318081635.796479-1-zyytlz.wz@163.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/message')
| -rw-r--r-- | drivers/message/fusion/mptlan.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/message/fusion/mptlan.c b/drivers/message/fusion/mptlan.c index 7d3784aa20e5..90cc3cd49a5e 100644 --- a/drivers/message/fusion/mptlan.c +++ b/drivers/message/fusion/mptlan.c @@ -1430,7 +1430,9 @@ mptlan_remove(struct pci_dev *pdev) { MPT_ADAPTER *ioc = pci_get_drvdata(pdev); struct net_device *dev = ioc->netdev; + struct mpt_lan_priv *priv = netdev_priv(dev); + cancel_delayed_work_sync(&priv->post_buckets_task); if(dev != NULL) { unregister_netdev(dev); free_netdev(dev); |