linux-kernel - Re: [PATCH 091/190] Revert "pinctrl: axp209: Fix NULL pointer dereference after allocation"

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Date:   Wed, 28 Apr 2021 16:32:56 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Aditya Pakki <pakki001@....edu>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH 091/190] Revert "pinctrl: axp209: Fix NULL pointer
 dereference after allocation"

On Wed, Apr 21, 2021 at 02:59:26PM +0200, Greg Kroah-Hartman wrote:
> This reverts commit 1adc90c7395742827d754a5f02f446818a77c379.
> 
> 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 published at 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).
> 
> 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: Aditya Pakki <pakki001@....edu>
> Cc: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
>  drivers/pinctrl/pinctrl-axp209.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/pinctrl/pinctrl-axp209.c b/drivers/pinctrl/pinctrl-axp209.c
> index 207cbae3a7bf..58f7149dd39b 100644
> --- a/drivers/pinctrl/pinctrl-axp209.c
> +++ b/drivers/pinctrl/pinctrl-axp209.c
> @@ -365,8 +365,6 @@ static int axp20x_build_funcs_groups(struct platform_device *pdev)
>  		pctl->funcs[i].groups = devm_kcalloc(&pdev->dev,
>  						     npins, sizeof(char *),
>  						     GFP_KERNEL);
> -		if (!pctl->funcs[i].groups)
> -			return -ENOMEM;
>  		for (pin = 0; pin < npins; pin++)
>  			pctl->funcs[i].groups[pin] = pctl->desc->pins[pin].name;
>  	}
> -- 
> 2.31.1
> 

This change looks correct, dropping the revert from my tree.

greg k-h