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Date:   Thu, 13 Oct 2022 07:55:36 +0200
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     Sasha Levin <sashal@kernel.org>
Cc:     linux-kernel@vger.kernel.org, stable@vger.kernel.org,
        GUO Zihua <guozihua@huawei.com>, Larry.Finger@lwfinger.net,
        florian.c.schilhabel@googlemail.com, fmdefrancesco@gmail.com,
        skumark1902@gmail.com, asif.kgauri@gmail.com,
        linux-staging@lists.linux.dev
Subject: Re: [PATCH AUTOSEL 5.4 06/27] staging: rtl8712: Fix return type for
 implementation of ndo_start_xmit
Message-ID: <Y0eoWDmylWzZjcNA@kroah.com>
References: <20221013002501.1895204-1-sashal@kernel.org>
 <20221013002501.1895204-6-sashal@kernel.org>
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On Wed, Oct 12, 2022 at 08:24:38PM -0400, Sasha Levin wrote:
> From: GUO Zihua <guozihua@huawei.com>
> 
> [ Upstream commit 307d343620e1fc7a6a2b7a1cdadb705532c9b6a5 ]
> 
> CFI (Control Flow Integrity) is a safety feature allowing the system to
> detect and react should a potential control flow hijacking occurs. In
> particular, the Forward-Edge CFI protects indirect function calls by
> ensuring the prototype of function that is actually called matches the
> definition of the function hook.
> 
> Since Linux now supports CFI, it will be a good idea to fix mismatched
> return type for implementation of hooks. Otherwise this would get
> cought out by CFI and cause a panic.

And another that should be dropped from all stable branches, thanks.

greg k-h