linux-kernel - Re: [linux-stable-rc:linux-5.10.y 7114/7120] arch/x86/kernel/kvm.o: warning: objtool: __raw_callee_save___kvm_vcpu_is_preempted()+0x12: 'naked' return found in RETHUNK build

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Message-ID: <d76cd438d325e874ededc4f58818f7edae6edd68.camel@kernel.org>
Date:   Thu, 14 Jul 2022 00:31:03 +0200
From:   Ben Hutchings <bwh@...nel.org>
To:     kernel test robot <lkp@...el.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Borislav Petkov <bp@...e.de>,
        Thadeu Lima de Souza Cascardo <cascardo@...onical.com>,
        stable <stable@...r.kernel.org>
Subject: Re: [linux-stable-rc:linux-5.10.y 7114/7120] arch/x86/kernel/kvm.o:
 warning: objtool: __raw_callee_save___kvm_vcpu_is_preempted()+0x12: 'naked'
 return found in RETHUNK build

On Wed, 2022-07-13 at 06:39 +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.10.y
> head:   53b881e19526bcc3e51d9668cab955c80dcf584c
> commit: 892f1f2b8631df5bdd0baba6e1ee3fa6eff396d0 [7114/7120] x86/retbleed: Add fine grained Kconfig knobs
> config: x86_64-rhel-8.3-syz (https://download.01.org/0day-ci/archive/20220713/202207130605.fX0cfbtW-lkp@intel.com/config)
> compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
> reproduce (this is a W=1 build):
>         # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=892f1f2b8631df5bdd0baba6e1ee3fa6eff396d0
>         git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
>         git fetch --no-tags linux-stable-rc linux-5.10.y
>         git checkout 892f1f2b8631df5bdd0baba6e1ee3fa6eff396d0
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/
> 
> If you fix the issue, kindly add following tag where applicable
> Reported-by: kernel test robot <lkp@...el.com>
> 
> All warnings (new ones prefixed by >>):
> 
> > > arch/x86/kernel/kvm.o: warning: objtool: __raw_callee_save___kvm_vcpu_is_preempted()+0x12: 'naked' return found in RETHUNK build
> 

5.10-stable will need this fix that was already included in 5.15-
stable:

commit edbaf6e5e93acda96aae23ba134ef3c1466da3b5
Author: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Date:   Thu Jun 30 12:19:47 2022 +0200
 
    x86, kvm: use proper ASM macros for kvm_vcpu_is_preempted

Ben.


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