linux-kernel - Re: [PATCH v2] amba: Fix use-after-free in amba_read

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Message-ID: <0d2875d6-280f-c901-a7b4-92ea6a84e966@gmail.com>
Date:   Tue, 6 Sep 2022 22:58:55 +0200
From:   Gabriel Francisco <frc.gabriel@...il.com>
To:     Isaac Manjarres <isaacmanjarres@...gle.com>
Cc:     Russell King <linux@...linux.org.uk>,
        Saravana Kannan <saravanak@...gle.com>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        patches@...linux.org.uk, Guenter Roeck <linux@...ck-us.net>,
        kernel-team@...roid.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] amba: Fix use-after-free in amba_read_periphid()

On 06/09/2022 19:54, Isaac Manjarres wrote:
> On Sun, Sep 4, 2022 at 4:15 AM Gabriel Francisco <frc.gabriel@...il.com> wrote:
>> This patch alone on top of v6.0-rc2 still gives me the null pointer.
>>
>> But combining it with Zhen Lei's patch (from
>> https://lkml.org/lkml/2022/8/27/164) my device boots successfully.
> Hi Gabriel,
>
> Thanks for your e-mail. I think my AMBA bus patch and
> https://lore.kernel.org/all/20220817184026.3468620-1-isaacmanjarres@google.com/
> (merged in 6.0-rc4), instead of Zhen Lei's patch, should fix the
> problem entirely.
>
> Thanks,
> Isaac

I'm afraid the issue is still showing up (looks similar when I tested 
with 6.0-rc2 + your patch and it went away when combining with Zhen 
Lei's one).

I added the dmesg log at 
https://bugzilla.kernel.org/attachment.cgi?id=301756

Thank you,

Gabriel Francisco