linux-kernel - Re: [PATCH 2/7] Revert "rtc: mc13xxx: fix a double-unlock issue"

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Date:   Thu, 29 Apr 2021 15:52:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Qiushi Wu <wu000273@....edu>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: Re: [PATCH 2/7] Revert "rtc: mc13xxx: fix a double-unlock issue"

On Thu, Apr 29, 2021 at 03:08:06PM +0200, Greg Kroah-Hartman wrote:
> This reverts commit 8816cd726a4fee197af2d851cbe25991ae19ea14.
> 
> Commits from @umn.edu addresses have been found to be submitted in "bad
> faith" to try to test the kernel community's ability to review "known
> malicious" changes.  The result of these submissions can be found in a
> paper submitted to the 42nd IEEE Symposium on Security and Privacy
> entitled, "Open Source Insecurity: Stealthily Introducing
> Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
> of Minnesota) and Kangjie Lu (University of Minnesota) but later
> withdrawn.
> 
> Because of this, all submissions from this group must be reverted from
> the kernel tree and will need to be re-reviewed again to determine if
> they actually are a valid fix.  Until that work is complete, remove this
> change to ensure that no problems are being introduced into the
> codebase.
> 
> Cc: Qiushi Wu <wu000273@....edu>
> Cc: Alexandre Belloni <alexandre.belloni@...tlin.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
>  drivers/rtc/rtc-mc13xxx.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/rtc/rtc-mc13xxx.c b/drivers/rtc/rtc-mc13xxx.c
> index d4234e78497e..0921ca792847 100644
> --- a/drivers/rtc/rtc-mc13xxx.c
> +++ b/drivers/rtc/rtc-mc13xxx.c
> @@ -308,10 +308,8 @@ static int __init mc13xxx_rtc_probe(struct platform_device *pdev)
>  	mc13xxx_unlock(mc13xxx);
>  
>  	ret = devm_rtc_register_device(priv->rtc);
> -	if (ret) {
> -		mc13xxx_lock(mc13xxx);
> +	if (ret)
>  		goto err_irq_request;
> -	}
>  
>  	return 0;
>  
> -- 
> 2.31.1
> 

The original change here looks correct to me, I'll drop this revert from
my tree.

thanks,

greg k-h