linux-kernel - Re: vmlinux.o: warning: objtool: noist_exc_machine_check()+0x93: call to __sanitizer_cov_trace

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Date:   Fri, 3 Sep 2021 19:22:25 +0200
From:   Borislav Petkov <bp@...e.de>
To:     kernel test robot <lkp@...el.com>
Cc:     Peter Zijlstra <peterz@...radead.org>, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Miroslav Benes <mbenes@...e.cz>
Subject: Re: vmlinux.o: warning: objtool: noist_exc_machine_check()+0x93:
 call to __sanitizer_cov_trace_pc() leaves .noinstr.text section

On Sun, Aug 22, 2021 at 04:54:06PM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   9ff50bf2f2ff5fab01cac26d8eed21a89308e6ef
> commit: bcb1b6ff39da7e8a6a986eb08126fba2b5e13c32 objtool: Correctly handle retpoline thunk calls
> date:   5 months ago
> config: x86_64-buildonly-randconfig-r003-20210822 (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce (this is a W=1 build):
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bcb1b6ff39da7e8a6a986eb08126fba2b5e13c32
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout bcb1b6ff39da7e8a6a986eb08126fba2b5e13c32
>         # save the attached .config to linux build tree
>         mkdir build_dir
>         make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> All warnings (new ones prefixed by >>):
> 
>    vmlinux.o: warning: objtool: mce_wrmsrl.constprop.0()+0x6b: call to __sanitizer_cov_trace_pc() leaves .noinstr.text section
>    vmlinux.o: warning: objtool: do_machine_check()+0xb14: call to queue_task_work() leaves .noinstr.text section
>    vmlinux.o: warning: objtool: exc_machine_check()+0xdb: call to __sanitizer_cov_trace_pc() leaves .noinstr.text section
> >> vmlinux.o: warning: objtool: noist_exc_machine_check()+0x93: call to __sanitizer_cov_trace_pc() leaves .noinstr.text section
>    vmlinux.o: warning: objtool: __context_tracking_enter()+0x95: call to __sanitizer_cov_trace_pc() leaves .noinstr.text section
>    vmlinux.o: warning: objtool: __context_tracking_exit()+0x42: call to __sanitizer_cov_trace_pc() leaves .noinstr.text section
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

https://lkml.kernel.org/r/YTHpmGmlo9N%2B1Rs7@hirez.programming.kicks-ass.net

-- 
Regards/Gruss,
    Boris.

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