linux-kernel - Re: [PATCH] firmware: arm_scmi: fix slab-use-after-free in scmi_bus

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Message-ID: <Zw5k2clQgGPQfRau@pluto>
Date: Tue, 15 Oct 2024 13:49:29 +0100
From: Cristian Marussi <cristian.marussi@....com>
To: Xinqi Zhang <quic_xinqzhan@...cinc.com>
Cc: Sudeep Holla <sudeep.holla@....com>,
	Cristian Marussi <cristian.marussi@....com>,
	linux-arm-msm@...r.kernel.org, arm-scmi@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] firmware: arm_scmi: fix slab-use-after-free in
 scmi_bus_notifier

On Tue, Oct 15, 2024 at 06:48:25PM +0800, Xinqi Zhang wrote:
> Move release of scmi_dev->name into scmi_device_release to
> avoid slab-use-after-free.
> 

Hi,

Thanks for reporting this.

Can you add a bit more of conetxt in the commit message on when this
happens ? From the stacktrace seems related to an early chan_setup failure
and the subsequent complete shutdown of the SCMI stack.

And also a Fixes tag would be useful.

Thanks,
Cristian