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Message-ID: <20250626150434.GM167785@nvidia.com>
Date: Thu, 26 Jun 2025 12:04:34 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Nicolin Chen <nicolinc@...dia.com>
Cc: kevin.tian@...el.com, shuah@...nel.org, joao.m.martins@...cle.com,
	steven.sistare@...cle.com, iommu@...ts.linux.dev,
	linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
	thomas.weissschuh@...utronix.de
Subject: Re: [PATCH rc v2 0/4] Fix iommufd selftest FAIL and warnings with
 v6.16

On Tue, Jun 24, 2025 at 11:00:44AM -0700, Nicolin Chen wrote:
> A few selftest harness changes being merged to v6.16, which exposed some
> bugs and vulnerabilities in the iommufd selftest code. Fix them properly.
> 
> Note that the patch fixing the build warnings at mfd is not ideal, as it
> has possibly hit some corner case in the gcc:
> https://lore.kernel.org/all/aEi8DV+ReF3v3Rlf@nvidia.com/
> 
> This is on github:
> https://github.com/nicolinc/iommufd/commits/iommufd_selftest_fixes-v6.16
> 
> Changelog:
> v2
>  * Add "Reviewed-by" from Jason
>  * Only use kfree() in the teardown()
>  * Add an mmap_buffer_size for readability
> v1
>  https://lore.kernel.org/all/cover.1750049883.git.nicolinc@nvidia.com/
> 
> Thanks
> Nicolin
> 
> Nicolin Chen (4):
>   iommufd/selftest: Fix iommufd_dirty_tracking with large hugepage sizes
>   iommufd/selftest: Add missing close(mfd) in memfd_mmap()
>   iommufd/selftest: Add asserts testing global mfd
>   iommufd/selftest: Fix build warnings due to uninitialized mfd

Applied to for-rc, thanks

Jason

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