This is a note to let you know that I've just added the patch titled
RDMA/siw: Remove namespace check from siw_netdev_event()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rdma-siw-remove-namespace-check-from-siw_netdev_even.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6ac8f6d27ea75628077684596318a35098947d24
Author: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Date: Sun Apr 2 14:10:13 2023 +0900
RDMA/siw: Remove namespace check from siw_netdev_event()
[ Upstream commit 266e9b3475ba82212062771fdbc40be0e3c06ec8 ]
syzbot is reporting that siw_netdev_event(NETDEV_UNREGISTER) cannot destroy
siw_device created after unshare(CLONE_NEWNET) due to net namespace check.
It seems that this check was by error there and should be removed.
Reported-by: syzbot <syzbot+5e70d01ee8985ae62a3b@xxxxxxxxxxxxxxxxxxxxxxxxx>
Link: https://syzkaller.appspot.com/bug?extid=5e70d01ee8985ae62a3b
Suggested-by: Jason Gunthorpe <jgg@xxxxxxxx>
Suggested-by: Leon Romanovsky <leon@xxxxxxxxxx>
Fixes: bdcf26bf9b3a ("rdma/siw: network and RDMA core interface")
Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/a44e9ac5-44e2-d575-9e30-02483cc7ffd1@xxxxxxxxxxxxxxxxxxx
Reviewed-by: Bernard Metzler <bmt@xxxxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/infiniband/sw/siw/siw_main.c b/drivers/infiniband/sw/siw/siw_main.c
index dbbf8c6c16d38..a462c2fc6f311 100644
--- a/drivers/infiniband/sw/siw/siw_main.c
+++ b/drivers/infiniband/sw/siw/siw_main.c
@@ -472,9 +472,6 @@ static int siw_netdev_event(struct notifier_block *nb, unsigned long event,
dev_dbg(&netdev->dev, "siw: event %lu\n", event);
- if (dev_net(netdev) != &init_net)
- return NOTIFY_OK;
-
base_dev = ib_device_get_by_netdev(netdev, RDMA_DRIVER_SIW);
if (!base_dev)
return NOTIFY_OK;
