linux-kernel - Re: [RESEND PATCH v8 00/11] Fix BUG_ON in vfio_iommu_group

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Message-ID: <20220504115135.GA49344@nvidia.com>
Date:   Wed, 4 May 2022 08:51:35 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Joerg Roedel <joro@...tes.org>
Cc:     Qian Cai <quic_qiancai@...cinc.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Liu Yi L <yi.l.liu@...el.com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH v8 00/11] Fix BUG_ON in vfio_iommu_group_notifier()

On Wed, May 04, 2022 at 10:42:07AM +0200, Joerg Roedel wrote:
> On Mon, May 02, 2022 at 12:12:04PM -0400, Qian Cai wrote:
> > Reverting this series fixed an user-after-free while doing SR-IOV.
> > 
> >  BUG: KASAN: use-after-free in __lock_acquire
>
> Hrm, okay. I am going exclude this series from my next branch for now
> until this has been sorted out.

This is going to blow up everything going on in vfio right now, let's
not do something so drastic please.

There is already a patch to fix it, lets wait for it to get sorted
out.

Nicolin and Eric have been testing with this series on ARM for a long
time now, it is not like it is completely broken.

Thanks,
Jason