linux-kernel - Re: BUG: KASAN: use-after-free in __list_add

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Message-ID: <CABXGCsMY5eEefYLvnqtws8MRAqHOaDW9JwfsCPnLZydLDQqyuA@mail.gmail.com>
Date:   Sun, 24 Jan 2021 23:23:31 +0500
From:   Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
To:     Hillf Danton <hdanton@...a.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Kees Cook <keescook@...omium.org>, paulmck@...ux.vnet.ibm.com
Subject: Re: BUG: KASAN: use-after-free in __list_add_valid+0x81/0xa0 (5.11-rc4)

On Sun, 24 Jan 2021 at 16:11, Hillf Danton <hdanton@...a.com> wrote:
>
> If it is supposed due to the race between pool->stale_lock and
> pool->lock that are both protecting the buddy list_head then adding
> another one can be a cure.  The diff below is not for any test.

Thanks for looking at the issue.
Why the proposed patch not intended for testing?
It is not the final (optimal) variant?


-- 
Best Regards,
Mike Gavrilov.