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From: Takashi Iwai <tiwai@suse.de>
To: Rajashekar kuruva <quic_kuruva@quicinc.com>
Cc: <srinivas.kandagatla@linaro.org>, <mathias.nyman@intel.com>,
	<perex@perex.cz>, <conor+dt@kernel.org>, <corbet@lwn.net>,
	<lgirdwood@gmail.com>, <andersson@kernel.org>,
	<krzysztof.kozlowski+dt@linaro.org>, <gregkh@linuxfoundation.org>,
	<Thinh.Nguyen@synopsys.com>, <broonie@kernel.org>,
	<bgoswami@quicinc.com>, <tiwai@suse.com>, <robh@kernel.org>,
	<konrad.dybcio@linaro.org>, <linux-kernel@vger.kernel.org>,
	<devicetree@vger.kernel.org>, <linux-sound@vger.kernel.org>,
	<linux-usb@vger.kernel.org>, <linux-arm-msm@vger.kernel.org>,
	<linux-doc@vger.kernel.org>, <alsa-devel@alsa-project.org>
Subject: Re: [PATCH] [RFC PATCH] ALSA: usb-audio: endpoint: Prevent NULL pointer deference in snd_usb_endpoint_close
Date: Fri, 26 Apr 2024 14:43:46 +0200	[thread overview]
Message-ID: <877cgks399.wl-tiwai@suse.de> (raw)
In-Reply-To: <20240426122511.547755-1-quic_kuruva@quicinc.com>

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

  reply	other threads:[~2024-04-26 12:44 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-26 12:25 [PATCH] [RFC PATCH] ALSA: usb-audio: endpoint: Prevent NULL pointer deference in snd_usb_endpoint_close Rajashekar kuruva
2024-04-26 12:43 ` Takashi Iwai [this message]
2024-04-29  6:23   ` Rajashekar Kuruva (Temp)
2024-04-29  6:57     ` Takashi Iwai
2024-05-03  9:20       ` Rajashekar Kuruva (Temp)
2024-05-07  5:16       ` Rajashekar Kuruva (Temp)
2024-05-07  6:21       ` Rajashekar Kuruva (Temp)
2024-05-07  6:26       ` Rajashekar Kuruva (Temp)
2024-05-07  6:35       ` Rajashekar Kuruva (Temp)
2024-05-07  6:44       ` Rajashekar Kuruva (Temp)

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