linux-kernel - Re: [PATCH] [v2] ALSA: hdsp: fix some memleaks in snd_hdsp_hwdep

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Sun, 7 Jan 2024 16:25:12 +0800 (GMT+08:00)
From: alexious@....edu.cn
To: "Takashi Iwai" <tiwai@...e.de>
Cc: "Jaroslav Kysela" <perex@...ex.cz>, "Takashi Iwai" <tiwai@...e.com>, 
	linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [v2] ALSA: hdsp: fix some memleaks in
 snd_hdsp_hwdep_ioctl

 
> On Wed, 27 Dec 2023 07:03:20 +0100,
> Zhipeng Lu wrote:
> > 
> > When snd_hdsp_load_firmware_from_cache and snd_hdsp_enable_io fails,
> > the hdsp->fw_uploaded needs to be free.Or there could be memleaks in
> > snd_hdsp_hwdep_ioctl.
> > 
> > Fixes: 90caaef6a1ce ("ALSA: hdsp: improve firmware caching")
> > Signed-off-by: Zhipeng Lu <alexious@....edu.cn>
> 
> Thanks for the patch, but the patch description is misleading.
> The allocated object isn't really "leaked"; it's released at the
> removal of the driver.

It is a little confused to me that I can't find a clear "removal" operation for 
hdsp->fw_uploaded. Could you please give a more detailed explaination, 
such as call chain, why hdsp->fw_uploaded is not leaked?

Thanks,

Zhipeng


> We may apply some optimization like you did, but then it should have a
> different description.
> 
> thanks,
> 
> Takashi