linux-kernel - Re: [PATCH] mm/migrate: fix do_pages

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Message-Id: <20231003094912.08cf57998135446ef475dd19@linux-foundation.org>
Date:   Tue, 3 Oct 2023 09:49:12 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Gregory Price <gourry.memverge@...il.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org, arnd@...db.de,
        Gregory Price <gregory.price@...verge.com>
Subject: Re: [PATCH] mm/migrate: fix do_pages_move for compat pointers

On Tue,  3 Oct 2023 10:48:56 -0400 Gregory Price <gourry.memverge@...il.com> wrote:

> do_pages_move does not handle compat pointers for the page list.
> correctly.  Add in_compat_syscall check and appropriate get_user
> fetch when iterating the page list.

What are the userspace visible effects of this change?