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

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Message-ID: <e4ca4197-0e3d-4d28-961d-7d5b5d6a9753@lucifer.local>
Date: Fri, 4 Oct 2024 10:58:43 +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 Fri, Oct 04, 2024 at 11:35:44AM +0200, Bert Karwatzki wrote:
> Here's the log procduced by this kernel:
>
> c9e7f76815d3 (HEAD -> maple_tree_debug_4) hack: set of info stuff v5
> 7e3bb072761a mm: correct error handling in mmap_region()
> 77df9e4bb222 (tag: next-20241001, origin/master, origin/HEAD, master) Add linux-next specific files for 20241001
>
> Again it took two attempts to trigger the bug.
>
> Bert Karwatzki
>

Thanks very much, it _looks_ like I have just repro'd the bug in userland
testing :))

HOPEFULLY unless I've made a mistake with that (after all this, hey I'm
cautious right?) this should be a straight line to me figuring out the bug
and coming up with a patch.

You are the reason this was even possible so thank you so much!