net/smc: cancel event worker during device removal

commit ece0d7bd74615773268475b6b64d6f1ebbd4b4c6 upstream.

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@syzkaller.appspotmail.com
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c
index ca505ff..c974d7d 100644 (file)
--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@ -561,6 +561,7 @@ static void smc_ib_remove_dev(struct ib_device *ibdev, void *client_data)
        smc_pnet_remove_by_ibdev(smcibdev);
        smc_ib_cleanup_per_ibdev(smcibdev);
        ib_unregister_event_handler(&smcibdev->event_handler);
+       cancel_work_sync(&smcibdev->port_event_work);
        kfree(smcibdev);
 }