linux-kernel - Re: [PATCH] cpufreq: Fixed kernel crash caused by cpufreq issues

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, 12 Apr 2024 12:03:50 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Lizhe <sensor1010@....com>
Cc: rafael@...nel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cpufreq: Fixed kernel crash caused by cpufreq issues

On 11-04-24, 16:18, Lizhe wrote:
> When the cpufreq_driver does not provide an exit() function.
> cpufreq offline operations can result in a kernel crash.
> 
> Signed-off-by: Lizhe <sensor1010@....com>
> ---
>  drivers/cpufreq/cpufreq.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> index 04d349372de3..e8660bc7d232 100644
> --- a/drivers/cpufreq/cpufreq.c
> +++ b/drivers/cpufreq/cpufreq.c
> @@ -1739,7 +1739,7 @@ static void cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif)
>  	}
>  
>  	/* We did light-weight exit earlier, do full tear down now */
> -	if (cpufreq_driver->offline)
> +	if (cpufreq_driver->offline && cpufreq_driver->exit)
>  		cpufreq_driver->exit(policy);
>  
>  	up_write(&policy->rwsem);

Hmm, saw this just now.

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh