Re: [PATCH v3 00/15] IOMMUFD Generic interface

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On Fri, Nov 04, 2022 at 04:03:48PM -0600, Alex Williamson wrote:
> On Fri, 4 Nov 2022 15:27:13 -0600
> Alex Williamson <alex.williamson@xxxxxxxxxx> wrote:
> 
> > On Tue, 25 Oct 2022 15:12:09 -0300
> > Jason Gunthorpe <jgg@xxxxxxxxxx> wrote:
> > 
> > > [
> > > At this point everything is done and I will start putting this work into a
> > > git tree and into linux-next with the intention of sending it during the
> > > next merge window.
> > > 
> > > I intend to focus the next several weeks on more intensive QA to look at
> > > error flows and other things. Hopefully including syzkaller if I'm lucky
> > > ]  
> > 
> > In case this one hasn't been reported yet (with IOMMUFD_VFIO_CONTAINER):
> 
> And...
> 
> ------------[ cut here ]------------
> WARNING: CPU: 4 PID: 1736 at drivers/iommu/iommufd/io_pagetable.c:660 iopt_destroy_table+0x91/0xc0 [iommufd]

This is a generic splat that says accounting has gone wrong

syzkaller hit splats like this and they are fixed, so I'm guessing it
is sorted out now. Most likely:

https://lore.kernel.org/all/Y2QfqAWxqT5cCfmN@xxxxxxxxxx/
https://lore.kernel.org/all/Y2U9LiwXxPO7G6YW@xxxxxxxxxx/

I hope to post v4 by the end of the day (the fixes on are on the
github already), so please re-test this

Jason



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