linux-kernel - Re: [PATCH AUTOSEL 5.10 05/25] x86/bugs: Report AMD retbleed vulnerability

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Message-ID: <YtezSJQfqZNQtmRa@kroah.com>
Date:   Wed, 20 Jul 2022 09:48:24 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Alexandre Chartre <alexandre.chartre@...cle.com>,
        Kim Phillips <kim.phillips@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...e.de>,
        Josh Poimboeuf <jpoimboe@...nel.org>, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        x86@...nel.org, pbonzini@...hat.com, chang.seok.bae@...el.com,
        pawan.kumar.gupta@...ux.intel.com, babu.moger@....com,
        jmattson@...gle.com, jing2.liu@...el.com, sandipan.das@....com,
        sblbir@...zon.com, keescook@...omium.org, tony.luck@...el.com,
        jane.malalane@...rix.com, bigeasy@...utronix.de
Subject: Re: [PATCH AUTOSEL 5.10 05/25] x86/bugs: Report AMD retbleed
 vulnerability

On Tue, Jul 19, 2022 at 09:15:56PM -0400, Sasha Levin wrote:
> From: Alexandre Chartre <alexandre.chartre@...cle.com>
> 
> [ Upstream commit 6b80b59b3555706508008f1f127b5412c89c7fd8 ]
> 
> Report that AMD x86 CPUs are vulnerable to the RETBleed (Arbitrary
> Speculative Code Execution with Return Instructions) attack.
> 
>   [peterz: add hygon]
>   [kim: invert parity; fam15h]
> 
> Co-developed-by: Kim Phillips <kim.phillips@....com>
> Signed-off-by: Kim Phillips <kim.phillips@....com>
> Signed-off-by: Alexandre Chartre <alexandre.chartre@...cle.com>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> Signed-off-by: Borislav Petkov <bp@...e.de>
> Reviewed-by: Josh Poimboeuf <jpoimboe@...nel.org>
> Signed-off-by: Borislav Petkov <bp@...e.de>
> Signed-off-by: Sasha Levin <sashal@...nel.org>
> ---
>  arch/x86/include/asm/cpufeatures.h |  1 +
>  arch/x86/kernel/cpu/bugs.c         | 13 +++++++++++++
>  arch/x86/kernel/cpu/common.c       | 19 +++++++++++++++++++
>  drivers/base/cpu.c                 |  8 ++++++++
>  include/linux/cpu.h                |  2 ++
>  5 files changed, 43 insertions(+)

This part of the larger retbleed series already queued up, so no need to
add it again.

thanks,

greg k-h