linux-kernel - Re: [PATCH v1] devres: Fix devm_krealloc() allocating memory with wrong size

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Message-ID: <2024061634-stack-plop-6aff@gregkh>
Date: Sun, 16 Jun 2024 11:58:43 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Zijun Hu <quic_zijuhu@...cinc.com>
Cc: rafael@...nel.org, andriy.shevchenko@...ux.intel.com, brgl@...ev.pl,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] devres: Fix devm_krealloc() allocating memory with
 wrong size

On Sun, Jun 16, 2024 at 05:54:15PM +0800, Zijun Hu wrote:
> Kernel API devm_krealloc() calls alloc_dr() with wrong argument
> @total_new_size, and it will cause more memory to be allocated
> than required, fixed by using @new_size as alloc_dr()'s argument.
> 
> Fixes: f82485722e5d ("devres: provide devm_krealloc()")
> Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
> ---
>  drivers/base/devres.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/base/devres.c b/drivers/base/devres.c
> index 3df0025d12aa..1cf87ddf1f55 100644
> --- a/drivers/base/devres.c
> +++ b/drivers/base/devres.c
> @@ -898,7 +898,7 @@ void *devm_krealloc(struct device *dev, void *ptr, size_t new_size, gfp_t gfp)
>  	 * taking the lock as most probably the caller uses GFP_KERNEL.
>  	 */
>  	new_dr = alloc_dr(devm_kmalloc_release,
> -			  total_new_size, gfp, dev_to_node(dev));
> +			  new_size, gfp, dev_to_node(dev));
>  	if (!new_dr)
>  		return NULL;
>  
> -- 
> 2.7.4
> 

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

You are receiving this message because of the following common error(s)
as indicated below:

- You have marked a patch with a "Fixes:" tag for a commit that is in an
  older released kernel, yet you do not have a cc: stable line in the
  signed-off-by area at all, which means that the patch will not be
  applied to any older kernel releases.  To properly fix this, please
  follow the documented rules in the
  Documentation/process/stable-kernel-rules.rst file for how to resolve
  this.

If you wish to discuss this problem further, or you have questions about
how to resolve this issue, please feel free to respond to this email and
Greg will reply once he has dug out from the pending patches received
from other developers.

thanks,

greg k-h's patch email bot