linux-kernel - Re: [PATCH] firmware: Always initialize the fw

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Message-ID: <20180920052204.GA15695@kroah.com>
Date:   Thu, 20 Sep 2018 07:22:04 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     "Luis R. Rodriguez" <mcgrof@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        stable@...r.kernel.org, Rishabh Bhatnagar <rishabhb@...eaurora.org>
Subject: Re: [PATCH] firmware: Always initialize the fw_priv list object

On Wed, Sep 19, 2018 at 06:09:38PM -0700, Bjorn Andersson wrote:
> 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@...r.kernel.org
> Cc: Rishabh Bhatnagar <rishabhb@...eaurora.org>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>  drivers/base/firmware_loader/main.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)

Is this being triggered by some hardware somewhere today?  Or is this
just a fix found by code inspection?

thanks,

greg k-h