linux-kernel - Re: [PATCH 103/190] Revert "thunderbolt: property: Fix a missing check of kzalloc"

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Message-ID: <20210422112500.GS3511397@lahna.fi.intel.com>
Date:   Thu, 22 Apr 2021 14:25:00 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, Kangjie Lu <kjlu@....edu>,
        Mukesh Ojha <mojha@...eaurora.org>
Subject: Re: [PATCH 103/190] Revert "thunderbolt: property: Fix a missing
 check of kzalloc"

On Wed, Apr 21, 2021 at 02:59:38PM +0200, Greg Kroah-Hartman wrote:
> This reverts commit 6183d5a51866f3acdeeb66b75e87d44025b01a55.
> 
> 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.

This one is a valid, although minor, fix.

> Cc: Kangjie Lu <kjlu@....edu>
> Cc: Mukesh Ojha <mojha@...eaurora.org>
> Cc: Mika Westerberg <mika.westerberg@...ux.intel.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
>  drivers/thunderbolt/property.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
> 
> diff --git a/drivers/thunderbolt/property.c b/drivers/thunderbolt/property.c
> index d5b0cdb8f0b1..841314deb446 100644
> --- a/drivers/thunderbolt/property.c
> +++ b/drivers/thunderbolt/property.c
> @@ -587,12 +587,7 @@ int tb_property_add_text(struct tb_property_dir *parent, const char *key,
>  		return -ENOMEM;
>  
>  	property->length = size / 4;
> -	property->value.text = kzalloc(size, GFP_KERNEL);
> -	if (!property->value.text) {
> -		kfree(property);
> -		return -ENOMEM;
> -	}
> -
> +	property->value.data = kzalloc(size, GFP_KERNEL);
>  	strcpy(property->value.text, text);
>  
>  	list_add_tail(&property->list, &parent->properties);
> -- 
> 2.31.1