Re: FAILED: patch "[PATCH] firmware: Always initialize the fw_priv list object" failed to apply to 4.14-stable tree

[Bjorn Andersson <bjorn.andersson@linaro.org>]

On Mon 08 Oct 10:43 PDT 2018, gregkh@linuxfoundation.org wrote:

> 
> The patch below does not apply to the 4.14-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@vger.kernel.org>.
> 

Hi Greg,

If/when you pick 422b3db2a503 ("firmware: Fix security issue with
request_firmware_into_buf()") for stable you need this patch as well.

Is there any particular way you would like me to annotate the Fixes/Cc
tags in the future to make this clear?

Regards,
Bjorn

> thanks,
> 
> greg k-h
> 
> ------------------ original commit in Linus's tree ------------------
> 
> From 7012040576c6ae25a47035659ee48673612c2c27 Mon Sep 17 00:00:00 2001
> From: Bjorn Andersson <bjorn.andersson@linaro.org>
> Date: Wed, 19 Sep 2018 18:09:38 -0700
> Subject: [PATCH] firmware: Always initialize the fw_priv list object
> 
> When freeing the fw_priv the item is taken off the list. This causes an
> oops in the FW_OPT_NOCACHE case as the list object is not initialized.
> 
> Make sure to initialize the list object regardless of this flag.
> 
> Fixes: 422b3db2a503 ("firmware: Fix security issue with request_firmware_into_buf()")
> Cc: stable@vger.kernel.org
> Cc: Rishabh Bhatnagar <rishabhb@codeaurora.org>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> 
> diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c
> index b3c0498ee433..8e9213b36e31 100644
> --- a/drivers/base/firmware_loader/main.c
> +++ b/drivers/base/firmware_loader/main.c
> @@ -226,8 +226,11 @@ static int alloc_lookup_fw_priv(const char *fw_name,
>  	}
>  
>  	tmp = __allocate_fw_priv(fw_name, fwc, dbuf, size);
> -	if (tmp && !(opt_flags & FW_OPT_NOCACHE))
> -		list_add(&tmp->list, &fwc->head);
> +	if (tmp) {
> +		INIT_LIST_HEAD(&tmp->list);
> +		if (!(opt_flags & FW_OPT_NOCACHE))
> +			list_add(&tmp->list, &fwc->head);
> +	}
>  	spin_unlock(&fwc->lock);
>  
>  	*fw_priv = tmp;
>