linux-kernel - Re: [tip:master 11/25] vmlinux.o: warning: objtool: fred_exc_machine_check+0x185: call to __kasan_check

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Message-ID: <20251106112539.GR3245006@noisy.programming.kicks-ass.net>
Date: Thu, 6 Nov 2025 12:25:39 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: kernel test robot <lkp@...el.com>
Cc: Ingo Molnar <mingo@...nel.org>, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [tip:master 11/25] vmlinux.o: warning: objtool:
 fred_exc_machine_check+0x185: call to __kasan_check_read() leaves
 .noinstr.text section

On Thu, Nov 06, 2025 at 12:16:10PM +0100, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git master
> head:   8411fdb92360d0b4d3337492a25ee2de7fb6c425
> commit: 8375dadb8d4c6de0dc916ea50b376d9d946ce544 [11/25] Merge branch into tip/master: 'perf/core'
> config: x86_64-randconfig-2005-20250721 (https://download.01.org/0day-ci/archive/20251106/202511061245.gdMzEtVA-lkp@intel.com/config)
> compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251106/202511061245.gdMzEtVA-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202511061245.gdMzEtVA-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
>    vmlinux.o: warning: objtool: exc_debug_user+0x1c9: call to __kasan_check_read() leaves .noinstr.text section
>    vmlinux.o: warning: objtool: exc_int3+0x15e: call to __kasan_check_read() leaves .noinstr.text section
>    vmlinux.o: warning: objtool: noist_exc_machine_check+0x179: call to __kasan_check_read() leaves .noinstr.text section
> >> vmlinux.o: warning: objtool: fred_exc_machine_check+0x185: call to __kasan_check_read() leaves .noinstr.text section

Right, this is a tree that does not yet include:

 cf76553aaa36 ("entry,unwind/deferred: Fix unwind_reset_info() placement")

which should fix this report.