linux-kernel - Re: [PATCH] [RFC PATCH] ALSA: usb-audio: endpoint: Prevent NULL pointer deference in snd_usb_endpoint

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: Fri, 26 Apr 2024 14:43:46 +0200
From: Takashi Iwai <tiwai@...e.de>
To: Rajashekar kuruva <quic_kuruva@...cinc.com>
Cc: <srinivas.kandagatla@...aro.org>,
	<mathias.nyman@...el.com>,
	<perex@...ex.cz>,
	<conor+dt@...nel.org>,
	<corbet@....net>,
	<lgirdwood@...il.com>,
	<andersson@...nel.org>,
	<krzysztof.kozlowski+dt@...aro.org>,
	<gregkh@...uxfoundation.org>,
	<Thinh.Nguyen@...opsys.com>,
	<broonie@...nel.org>,
	<bgoswami@...cinc.com>,
	<tiwai@...e.com>,
	<robh@...nel.org>,
	<konrad.dybcio@...aro.org>,
	<linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>,
	<linux-sound@...r.kernel.org>,
	<linux-usb@...r.kernel.org>,
	<linux-arm-msm@...r.kernel.org>,
	<linux-doc@...r.kernel.org>,
	<alsa-devel@...a-project.org>
Subject: Re: [PATCH] [RFC PATCH] ALSA: usb-audio: endpoint: Prevent NULL pointer deference in snd_usb_endpoint_close

On Fri, 26 Apr 2024 14:25:11 +0200,
Rajashekar kuruva wrote:
> 
> When multiple plug-in and plug-out events occur,
> there is a risk of encountering a NULL pointer dereference
> leading to a kernel panic during a headset use-case.
> this issue arises in the snd_usb_endpoint_close function

Such a scenario can't happen: ep->iface_ref is changed only in
chip->mutex lock, hence it can't be NULL there.


thanks,

Takashi