linux-kernel - Re: [PATCH 034/190] Revert "efi/esrt: Fix reference count leak in esre_create_sysfs

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Date:   Tue, 27 Apr 2021 18:39:29 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Qiushi Wu <wu000273@....edu>, Ard Biesheuvel <ardb@...nel.org>
Subject: Re: [PATCH 034/190] Revert "efi/esrt: Fix reference count leak in
 esre_create_sysfs_entry."

On Wed, Apr 21, 2021 at 02:58:29PM +0200, Greg Kroah-Hartman wrote:
> This reverts commit 4ddf4739be6e375116c375f0a68bf3893ffcee21.
> 
> 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: Qiushi Wu <wu000273@....edu>
> Cc: https
> Cc: Ard Biesheuvel <ardb@...nel.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
>  drivers/firmware/efi/esrt.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/firmware/efi/esrt.c b/drivers/firmware/efi/esrt.c
> index d5915272141f..e3d692696583 100644
> --- a/drivers/firmware/efi/esrt.c
> +++ b/drivers/firmware/efi/esrt.c
> @@ -181,7 +181,7 @@ static int esre_create_sysfs_entry(void *esre, int entry_num)
>  		rc = kobject_init_and_add(&entry->kobj, &esre1_ktype, NULL,
>  					  "entry%d", entry_num);
>  		if (rc) {
> -			kobject_put(&entry->kobj);
> +			kfree(entry);
>  			return rc;
>  		}
>  	}
> -- 
> 2.31.1
> 

Looks correct so I'm dropping the revert.

greg k-h