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Subject: Re: [PATCH 084/190] Revert "net: ieee802154: fix missing checks for
 regmap_update_bits"
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-kernel@vger.kernel.org
Cc:     Kangjie Lu <kjlu@umn.edu>, Mukesh Ojha <mojha@codeaurora.org>
References: <20210421130105.1226686-1-gregkh@linuxfoundation.org>
 <20210421130105.1226686-85-gregkh@linuxfoundation.org>
From:   Stefan Schmidt <stefan@datenfreihafen.org>
Message-ID: <4e9dad99-8a88-a617-33be-0cb17824bc62@datenfreihafen.org>
Date:   Wed, 21 Apr 2021 15:23:06 +0200
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Hello.

On 21.04.21 14:59, Greg Kroah-Hartman wrote:
> This reverts commit 22e8860cf8f777fbf6a83f2fb7127f682a8e9de4.
> 
> 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: Kangjie Lu <kjlu@umn.edu>
> Cc: Mukesh Ojha <mojha@codeaurora.org>
> Cc: Stefan Schmidt <stefan@datenfreihafen.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
>   drivers/net/ieee802154/mcr20a.c | 6 ------
>   1 file changed, 6 deletions(-)
> 
> diff --git a/drivers/net/ieee802154/mcr20a.c b/drivers/net/ieee802154/mcr20a.c
> index 8dc04e2590b1..2ce5b41983f8 100644
> --- a/drivers/net/ieee802154/mcr20a.c
> +++ b/drivers/net/ieee802154/mcr20a.c
> @@ -524,8 +524,6 @@ mcr20a_start(struct ieee802154_hw *hw)
>   	dev_dbg(printdev(lp), "no slotted operation\n");
>   	ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL1,
>   				 DAR_PHY_CTRL1_SLOTTED, 0x0);
> -	if (ret < 0)
> -		return ret;
>   
>   	/* enable irq */
>   	enable_irq(lp->spi->irq);
> @@ -533,15 +531,11 @@ mcr20a_start(struct ieee802154_hw *hw)
>   	/* Unmask SEQ interrupt */
>   	ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL2,
>   				 DAR_PHY_CTRL2_SEQMSK, 0x0);
> -	if (ret < 0)
> -		return ret;
>   
>   	/* Start the RX sequence */
>   	dev_dbg(printdev(lp), "start the RX sequence\n");
>   	ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL1,
>   				 DAR_PHY_CTRL1_XCVSEQ_MASK, MCR20A_XCVSEQ_RX);
> -	if (ret < 0)
> -		return ret;
>   
>   	return 0;
>   }
> 


Acked-by: Stefan Schmidt <stefan@datenfreihafen.org>

regards
Stefan Schmidt