linux-kernel - Re: [PATCH] cpufreq: apple-soc: Fix null-ptr-deref in apple_soc_cpufreq_get

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Message-ID: <e23e7566-fc04-46bf-9d77-317d8a23c146@web.de>
Date: Mon, 7 Apr 2025 11:17:19 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: Henry Martin <bsdhenrymartin@...il.com>, asahi@...ts.linux.dev,
 linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc: LKML <linux-kernel@...r.kernel.org>,
 Alyssa Rosenzweig <alyssa@...enzweig.io>, Janne Grunau <j@...nau.net>,
 Neal Gompa <neal@...pa.dev>, "Rafael J. Wysocki" <rafael@...nel.org>,
 Sven Peter <sven@...npeter.dev>, Viresh Kumar <viresh.kumar@...aro.org>
Subject: Re: [PATCH] cpufreq: apple-soc: Fix null-ptr-deref in
 apple_soc_cpufreq_get_rate()

> cpufreq_cpu_get_raw() can return NULL when the target CPU is not present
> in the policy->cpus mask. apple_soc_cpufreq_get_rate() does not check
> for this case, which results in a NULL pointer dereference.

See also once more:
https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.15-rc1#n94

Can any other summary phrase variant become more desirable accordingly?

Regards,
Markus