linux-kernel - Re: [syzbot] Monthly rdma report (Nov 2024)

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Message-ID: <20241202144612.GE773835@ziepe.ca>
Date: Mon, 2 Dec 2024 10:46:12 -0400
From: Jason Gunthorpe <jgg@...pe.ca>
To: Zhu Yanjun <yanjun.zhu@...ux.dev>
Cc: syzbot <syzbot+list61c5ef3632c5b9ec2d7d@...kaller.appspotmail.com>,
	linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
	netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] Monthly rdma report (Nov 2024)

On Fri, Nov 29, 2024 at 12:30:37PM +0100, Zhu Yanjun wrote:

> When pd pool is not empty, it seems that at least one pd is not removed when
> rdma link is removed. The caller should check the application to remove this
> pd before a rdma link is removed.

The bug is that this somehow happened, I think. There should be
refcounts preventing removal of an ib device while a client is
attached

Or, perhaps more likely, it is a pd leak on an error path.

Jason