linux-kernel - Re: [PATCH 016/190] Revert "drm/nouveau: fix reference count leak in nouveau_debugfs_strap

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Message-ID: <YIg6zHrrywU+6K7q@kroah.com>
Date:   Tue, 27 Apr 2021 18:24:44 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Aditya Pakki <pakki001@....edu>, Ben Skeggs <bskeggs@...hat.com>
Subject: Re: [PATCH 016/190] Revert "drm/nouveau: fix reference count leak in
 nouveau_debugfs_strap_peek"

On Wed, Apr 21, 2021 at 02:58:11PM +0200, Greg Kroah-Hartman wrote:
> This reverts commit 8f29432417b11039ef960ab18987c7d61b2b5396.
> 
> 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: Ben Skeggs <bskeggs@...hat.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
>  drivers/gpu/drm/nouveau/nouveau_debugfs.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
> index c2bc05eb2e54..c8da70e06006 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_debugfs.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
> @@ -54,10 +54,8 @@ nouveau_debugfs_strap_peek(struct seq_file *m, void *data)
>  	int ret;
>  
>  	ret = pm_runtime_get_sync(drm->dev->dev);
> -	if (ret < 0 && ret != -EACCES) {
> -		pm_runtime_put_autosuspend(drm->dev->dev);
> +	if (ret < 0 && ret != -EACCES)
>  		return ret;
> -	}
>  
>  	seq_printf(m, "0x%08x\n",
>  		   nvif_rd32(&drm->client.device.object, 0x101000));
> -- 
> 2.31.1
> 

Looks correct, dropping this.

greg k-h