From: Jason Gunthorpe <jgg@nvidia.com>
To: Trond Myklebust <trondmy@hammerspace.com>
Cc: "linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
"trondmy@kernel.org" <trondmy@kernel.org>
Subject: Re: [PATCH] RDMA: null pointer in __ib_umem_release causes kernel panic
Date: Wed, 5 Jan 2022 13:43:55 -0400 [thread overview]
Message-ID: <20220105174355.GU2328285@nvidia.com> (raw)
In-Reply-To: <f6480329a7d86e5eb10f11b5bc5049868981dd3d.camel@hammerspace.com>
On Wed, Jan 05, 2022 at 05:16:06PM +0000, Trond Myklebust wrote:
> > I'm confused, RPC/RDMA should never touch a umem at all.
> >
> > Is this really the other bug where user and kernel MR are getting
> > confused?
> >
>
> As far as I know, RPC/RDMA is just using the RDMA api to register and
> unregister chunks of memory, so it is definitely not directly touching
> the umem.
I mean, RPC/RDMA doesn't have a umem at all, so seeing it any stack
trace says something is corrupted
I suppose it is this:
https://lore.kernel.org/r/20211222101312.1358616-1-maorg@nvidia.com
Jason
next prev parent reply other threads:[~2022-01-05 17:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-05 14:18 [PATCH] RDMA: null pointer in __ib_umem_release causes kernel panic trondmy
2022-01-05 14:37 ` Jason Gunthorpe
2022-01-05 15:02 ` Trond Myklebust
2022-01-05 16:09 ` Jason Gunthorpe
2022-01-05 17:16 ` Trond Myklebust
2022-01-05 17:43 ` Jason Gunthorpe [this message]
2022-01-05 17:49 ` Trond Myklebust
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