Re: [tip:ras/core] BUILD SUCCESS de768416b203ac84e02a757b782a32efb388476f

[Chen, Rong A]

On 12/29/2021 5:34 PM, Borislav Petkov wrote:
> On Wed, Dec 29, 2021 at 08:13:09AM +0800, kernel test robot wrote:
> > tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git ras/core
> > branch HEAD: de768416b203ac84e02a757b782a32efb388476f  x86/mce/inject: Avoid out-of-bounds write when setting flags
> >
> > possible Warning in current branch (please contact us if interested):
> >
> > vmlinux.o: warning: objtool: do_machine_check()+0x59a: call to test_bit() leaves .noinstr.text section
> >
> > Warning ids grouped by kconfigs:
> >
> > gcc_recent_errors
> > `-- x86_64-buildonly-randconfig-r006-20211228
> >      `-- vmlinux.o:warning:objtool:do_machine_check():call-to-test_bit()-leaves-.noinstr.text-section
>
> Yes, I'm interested. Please send me reproduction instructions.
>
> Thx.


Hi Borislav,

Below is the report:

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git ras/core
head:   de768416b203ac84e02a757b782a32efb388476f
commit: b4813539d37fa31fed62cdfab7bd2dd8929c5b2e [15/23] x86/mce: Mark 
mce_end() noinstr
config: x86_64-buildonly-randconfig-r006-20211228 (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/tip/tip.git/commit/?id=b4813539d37fa31fed62cdfab7bd2dd8929c5b2e
        git remote add tip 
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
        git fetch --no-tags tip ras/core
        git checkout b4813539d37fa31fed62cdfab7bd2dd8929c5b2e
        # save the config file 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@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> vmlinux.o: warning: objtool: do_machine_check()+0x59a: call to 
test_bit() leaves .noinstr.text section

---
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Attachment: config.gz
Description: GNU Zip compressed data