linux-kernel - Re: [PATCH v8 14/21] mm/mmap: Avoid zeroing vma tree in mmap

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Message-ID: <68150802-eea8-4d3c-9904-43c02d3e3fa4@lucifer.local>
Date: Wed, 2 Oct 2024 21:44:42 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Bert Karwatzki <spasswolf@....de>
Cc: "Liam R . Howlett" <Liam.Howlett@...cle.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 14/21] mm/mmap: Avoid zeroing vma tree in mmap_region()

On Wed, Oct 02, 2024 at 10:39:06PM GMT, Bert Karwatzki wrote:

[snip]

> I just figured out what was wrong for me in "Ruins of Tasos", I didn't have the
> 32bit vulkan drivers installed, so perhaps if you remove your 32bit vulkan
> driver package you can get the crash, too.

Thanks, unfortunately I use arch and it has a hard dependency on that. I might
try to force it uninstalled anyway.

Sorry to have to keep asking you to repro but for now the only way sadly :(

Hopefully this final patch that I set should give us the final bits of
information we need, can't be sure though.

This is certainly a very strange thing! I wonder whether a driver is
relying on old mmap() MAP_FIXED behaviour...