linux-kernel - Re: [PATCH] ALSA: line6: Improve poor error handling in line6_init_cap

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Message-ID: <20210525080033.GA13895@hyeyoo>
Date:   Tue, 25 May 2021 17:00:33 +0900
From:   Hyeonggon Yoo <42.hyeyoo@...il.com>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Oliver Neukum <oneukum@...e.com>,
        Vasily Khoruzhick <anarsoul@...il.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ALSA: line6: Improve poor error handling in
 line6_init_cap_control

On Tue, May 25, 2021 at 09:05:13AM +0200, Takashi Iwai wrote:
> Those resources are freed in the common destructor of the card
> instance, line6_destruct(),

Oh my god, I missed line6_destruct.

> at disconnect callback, so it's redundant
> to release them here; even worse, since you haven't re-initialize with
> NULL, this change would lead to double-free.

Yes then it can cause double-free..

>
>
> thanks,
>
> Takashi

I made a mistake, I'm so sorry to take your time...

Thanks,
Hyeonggon