linux-kernel - Re: [PATCH v5 1/1] selftests/mm/uffd: Refactor non-composite global vars into struct

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Message-ID: <DAPKLM86IC4F.1MCOR35P2D9VV@google.com>
Date: Wed, 18 Jun 2025 10:00:49 +0000
From: Brendan Jackman <jackmanb@...gle.com>
To: Peter Xu <peterx@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>
Cc: Ujwal Kundur <ujwal.kundur@...il.com>, <shuah@...nel.org>, 
	<linux-kernel@...r.kernel.org>, <linux-kselftest@...r.kernel.org>, 
	<linux-mm@...ck.org>
Subject: Re: [PATCH v5 1/1] selftests/mm/uffd: Refactor non-composite global
 vars into struct

On Tue Jun 17, 2025 at 5:22 PM UTC, Peter Xu wrote:
> ERROR: munmap (errno=22, @uffd-common.c:277)

Looks the same as what I reported here:

https://lore.kernel.org/all/DAITJKYRQMFD.OLOUWS7UPGVD@google.com/

> Ujwal, can you reproduce these issues and have a look?

The script I mentioned in that other mail should help with this:

https://github.com/bjackman/linux/blob/github-base/.github/scripts/run_local.sh

That's my hacky attempt at a "hermetic" runner for these tests, it
ought to let you get the exact Kconfig, userspace, and QEMU command
that I used when I hit the issue. 

The GitHub workflow definition shows how to get its dependencies
installed on a Debian-alike:

https://github.com/bjackman/linux/blob/github-base/.github/workflows/test.yaml