Commit b4f12e24 authored Apr 02, 2023 by Tetsuo Handa Committed by Greg Kroah-Hartman May 17, 2023

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@syzkaller.appspotmail.com>
Link: https://syzkaller.appspot.com/bug?extid=5e70d01ee8985ae62a3b


Suggested-by: Jason Gunthorpe <jgg@ziepe.ca>
Suggested-by: Leon Romanovsky <leon@kernel.org>
Fixes: bdcf26bf ("rdma/siw: network and RDMA core interface")
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Link: https://lore.kernel.org/r/a44e9ac5-44e2-d575-9e30-02483cc7ffd1@I-love.SAKURA.ne.jp


Reviewed-by: Bernard Metzler <bmt@zurich.ibm.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 795d11e8

drivers/infiniband/sw/siw/siw_main.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -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;