linux-kernel - Re: [PATCH 144/190] Revert "misc/ics932s401: Add a missing check to i2c_smbus_read_word

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Date:   Tue, 27 Apr 2021 20:17:00 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Aditya Pakki <pakki001@....edu>
Subject: Re: [PATCH 144/190] Revert "misc/ics932s401: Add a missing check to
 i2c_smbus_read_word_data"

On Wed, Apr 21, 2021 at 03:00:19PM +0200, Greg Kroah-Hartman wrote:
> This reverts commit b05ae01fdb8966afff5b153e7a7ee24684745e2d.
> 
> 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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
>  drivers/misc/ics932s401.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/misc/ics932s401.c b/drivers/misc/ics932s401.c
> index 2bdf560ee681..733e5c2b57ce 100644
> --- a/drivers/misc/ics932s401.c
> +++ b/drivers/misc/ics932s401.c
> @@ -133,8 +133,6 @@ static struct ics932s401_data *ics932s401_update_device(struct device *dev)
>  	 */
>  	for (i = 0; i < NUM_MIRRORED_REGS; i++) {
>  		temp = i2c_smbus_read_word_data(client, regs_to_copy[i]);
> -		if (temp < 0)
> -			data->regs[regs_to_copy[i]] = 0;
>  		data->regs[regs_to_copy[i]] = temp >> 8;
>  	}
>  
> -- 
> 2.31.1
> 

While ackward, the original looks good enough for now, so I'll drop this
revert.

greg k-h