linux-kernel - Re: [PATCH 6.1 00/15] 6.1.48-rc1 review

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Message-ID: <20230825-radish-gong-b42f53b3e6ad@wendy>
Date:   Fri, 25 Aug 2023 13:16:07 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     <stable@...r.kernel.org>, <patches@...ts.linux.dev>,
        <linux-kernel@...r.kernel.org>, <torvalds@...ux-foundation.org>,
        <akpm@...ux-foundation.org>, <linux@...ck-us.net>,
        <shuah@...nel.org>, <patches@...nelci.org>,
        <lkft-triage@...ts.linaro.org>, <pavel@...x.de>,
        <jonathanh@...dia.com>, <f.fainelli@...il.com>,
        <sudipm.mukherjee@...il.com>, <srw@...dewatkins.net>,
        <rwarsow@....de>, <conor@...nel.org>
Subject: Re: [PATCH 6.1 00/15] 6.1.48-rc1 review

On Thu, Aug 24, 2023 at 04:14:56PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.1.48 release.
> There are 15 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

SRSO mitigations are probably not in the slightest bit relevant for me,
but I didn't get a chance to retest the previous stable release after
the build got unbricked for RISC-V, so:
Tested-by: Conor Dooley <conor.dooley@...rochip.com>

Fix for the build issue I saw should be on it's way to Linus today, so
I guess the original fix you were backporting & its fix should end up
back in your queue soonTM.

Thanks,
Conor.

> 
> Responses should be made by Sat, 26 Aug 2023 14:14:28 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.1.48-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.1.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 
> -------------
> Pseudo-Shortlog of commits:
> 
> Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>     Linux 6.1.48-rc1
> 
> Borislav Petkov (AMD) <bp@...en8.de>
>     x86/srso: Correct the mitigation status when SMT is disabled
> 
> Peter Zijlstra <peterz@...radead.org>
>     objtool/x86: Fixup frame-pointer vs rethunk
> 
> Petr Pavlu <petr.pavlu@...e.com>
>     x86/retpoline,kprobes: Fix position of thunk sections with CONFIG_LTO_CLANG
> 
> Borislav Petkov (AMD) <bp@...en8.de>
>     x86/srso: Disable the mitigation on unaffected configurations
> 
> Borislav Petkov (AMD) <bp@...en8.de>
>     x86/CPU/AMD: Fix the DIV(0) initial fix attempt
> 
> Sean Christopherson <seanjc@...gle.com>
>     x86/retpoline: Don't clobber RFLAGS during srso_safe_ret()
> 
> Peter Zijlstra <peterz@...radead.org>
>     x86/static_call: Fix __static_call_fixup()
> 
> Borislav Petkov (AMD) <bp@...en8.de>
>     x86/srso: Explain the untraining sequences a bit more
> 
> Peter Zijlstra <peterz@...radead.org>
>     x86/cpu: Cleanup the untrain mess
> 
> Peter Zijlstra <peterz@...radead.org>
>     x86/cpu: Rename srso_(.*)_alias to srso_alias_\1
> 
> Peter Zijlstra <peterz@...radead.org>
>     x86/cpu: Rename original retbleed methods
> 
> Peter Zijlstra <peterz@...radead.org>
>     x86/cpu: Clean up SRSO return thunk mess
> 
> Peter Zijlstra <peterz@...radead.org>
>     x86/alternative: Make custom return thunk unconditional
> 
> Peter Zijlstra <peterz@...radead.org>
>     x86/cpu: Fix up srso_safe_ret() and __x86_return_thunk()
> 
> Peter Zijlstra <peterz@...radead.org>
>     x86/cpu: Fix __x86_return_thunk symbol type
> 
> 
> -------------
> 
> Diffstat:
> 
>  Documentation/admin-guide/hw-vuln/srso.rst |   4 +-
>  Makefile                                   |   4 +-
>  arch/x86/include/asm/entry-common.h        |   1 +
>  arch/x86/include/asm/nospec-branch.h       |  28 +++---
>  arch/x86/kernel/cpu/amd.c                  |   1 +
>  arch/x86/kernel/cpu/bugs.c                 |  28 +++++-
>  arch/x86/kernel/static_call.c              |  13 +++
>  arch/x86/kernel/traps.c                    |   2 -
>  arch/x86/kernel/vmlinux.lds.S              |  20 ++--
>  arch/x86/kvm/svm/svm.c                     |   2 +
>  arch/x86/lib/retpoline.S                   | 141 ++++++++++++++++++++---------
>  tools/objtool/arch/x86/decode.c            |   2 +-
>  tools/objtool/check.c                      |  21 +++--
>  13 files changed, 182 insertions(+), 85 deletions(-)
> 
> 

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