netdev - [PATCH v2 net] net/smc: cancel event worker during device removal

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Date:   Tue, 10 Mar 2020 09:33:30 +0100
From:   Karsten Graul <kgraul@...ux.ibm.com>
To:     davem@...emloft.net
Cc:     leon@...nel.org, netdev@...r.kernel.org,
        linux-s390@...r.kernel.org, heiko.carstens@...ibm.com,
        raspl@...ux.ibm.com, ubraun@...ux.ibm.com
Subject: [PATCH v2 net] net/smc: cancel event worker during device removal

During IB device removal, cancel the event worker before the device
structure is freed.

Fixes: a4cf0443c414 ("smc: introduce SMC as an IB-client")
Reported-by: syzbot+b297c6825752e7a07272@...kaller.appspotmail.com
Signed-off-by: Karsten Graul <kgraul@...ux.ibm.com>
Reviewed-by: Ursula Braun <ubraun@...ux.ibm.com>
---
 net/smc/smc_ib.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c
index d6ba186f67e2..05b825b3cfa4 100644
--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@ -582,6 +582,7 @@ static void smc_ib_remove_dev(struct ib_device *ibdev, void *client_data)
 	smc_smcr_terminate_all(smcibdev);
 	smc_ib_cleanup_per_ibdev(smcibdev);
 	ib_unregister_event_handler(&smcibdev->event_handler);
+	cancel_work_sync(&smcibdev->port_event_work);
 	kfree(smcibdev);
 }
 
-- 
2.17.1