linux-kernel - Re: [PATCH v4 1/1] exec: seal system mappings

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Message-ID: <ocstrhpyoyxzurvvxbrbnlzfqzo6hiqt7dxj7vu45ipj4min6z@ffnpao72slda>
Date: Fri, 17 Jan 2025 17:08:23 -0500
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
To: enh <enh@...gle.com>
Cc: Jeff Xu <jeffxu@...omium.org>, Pedro Falcato <pedro.falcato@...il.com>,
        Benjamin Berg <benjamin@...solutions.net>,
        Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
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        Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>
Subject: Re: [PATCH v4 1/1] exec: seal system mappings

* enh <enh@...gle.com> [250117 14:35]:
...

> 
> as a maintainer of a different linux libc, i've long wanted a "tell me
> everything there is to know about this vma" syscall rather than having
> to parse /proc/maps...
> 

You mean an ioctl()-based API to query VMAs from /proc/<pid>/maps?

Andrii had something like that [1], check out ed5d583a88a92 ("fs/procfs:
implement efficient VMA querying API for /proc/<pid>/maps")

Regards,
Liam

[1]. https://lore.kernel.org/linux-mm/20240627170900.1672542-1-andrii@kernel.org/