linux-kernel - Re: [PATCH] kexec_core: fix the assignment to kimage->control

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Message-Id: <20231221141258.7113f9b2599ea6d3b6638e08@linux-foundation.org>
Date: Thu, 21 Dec 2023 14:12:58 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Yuntao Wang <ytcoode@...il.com>
Cc: linux-kernel@...r.kernel.org, kexec@...ts.infradead.org, Baoquan He
 <bhe@...hat.com>, Eric Biederman <ebiederm@...ssion.com>
Subject: Re: [PATCH] kexec_core: fix the assignment to kimage->control_page

On Thu, 21 Dec 2023 12:23:08 +0800 Yuntao Wang <ytcoode@...il.com> wrote:

> image->control_page represents the starting address for allocating the next
> control page, while hole_end represents the address of the last valid byte
> of the currently allocated control page.
> 
> Therefore, after successfully allocating a control page, image->control_page
> should be updated to `hole_end + 1`, rather than hole_end.

Thanks.  Again, please include a description of the userspace-visible effects of the bug.