From: Borislav Petkov <bp@suse.de>
To: kernel test robot <lkp@intel.com>
Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org,
x86-ml <x86@kernel.org>
Subject: Re: vmlinux.o: warning: objtool: mce_wrmsrl.constprop.0()+0x6b: call to __sanitizer_cov_trace_pc() leaves .noinstr.text section
Date: Thu, 2 Sep 2021 21:35:12 +0200 [thread overview]
Message-ID: <YTEncGj84Sj/IdDb@zn.tnic> (raw)
In-Reply-To: <202108221334.TiXxFSTZ-lkp@intel.com>
On Sun, Aug 22, 2021 at 01:39:40PM +0800, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 9ff50bf2f2ff5fab01cac26d8eed21a89308e6ef
> commit: e100777016fdf6ec3a9d7c1773b15a2b5eca6c55 x86/mce: Annotate mce_rd/wrmsrl() with noinstr
> date: 11 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=e100777016fdf6ec3a9d7c1773b15a2b5eca6c55
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git fetch --no-tags linus master
> git checkout e100777016fdf6ec3a9d7c1773b15a2b5eca6c55
> # 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@intel.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()+0xe1a: call to mce_panic.isra.0() leaves .noinstr.text section
> vmlinux.o: warning: objtool: exc_machine_check()+0x1af: call to __sanitizer_cov_trace_pc() leaves .noinstr.text section
> vmlinux.o: warning: objtool: lock_is_held_type()+0x3c: call to check_flags() leaves .noinstr.text section
> vmlinux.o: warning: objtool: __context_tracking_enter()+0x9d: 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
The sanitizer stuff is being NOPed out with newer compilers, says
peterz. And I can confirm after testing with your .config and with
gcc-11.
The mce_panic() thing I'm working on.
--
Regards/Gruss,
Boris.
SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg
next prev parent reply other threads:[~2021-09-02 19:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-22 5:39 vmlinux.o: warning: objtool: mce_wrmsrl.constprop.0()+0x6b: call to __sanitizer_cov_trace_pc() leaves .noinstr.text section kernel test robot
2021-09-02 19:35 ` Borislav Petkov [this message]
2021-09-03 9:23 ` Peter Zijlstra
2021-09-03 9:54 ` Borislav Petkov
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