linux-kernel - Re: [PATCH 4.14 05/40] efi/libstub: Disable Shadow Call Stack

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Date:   Mon, 26 Sep 2022 17:56:38 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Pavel Machek <pavel@...x.de>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        James Morse <james.morse@....com>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Will Deacon <will@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 4.14 05/40] efi/libstub: Disable Shadow Call Stack

On Mon, Sep 26, 2022 at 01:14:08PM +0200, Pavel Machek wrote:
> Hi!
> 
> > From: Sami Tolvanen <samitolvanen@...gle.com>
> > 
> > [ Upstream commit cc49c71d2abe99c1c2c9bedf0693ad2d3ee4a067 ]
> > 
> > Shadow stacks are not available in the EFI stub, filter out SCS
> > flags.
> 
> AFAICT, SCS is not available in 4.19, CC_FLAGS_SCS is not defined
> there, and we should apply this patch.

Now dropped from everywhere, thanks.

greg k-h