From: Stephen Rothwell <sfr@canb•auug.org.au>
To: Peter Zijlstra <peterz@infradead•org>
Cc: Josh Poimboeuf <jpoimboe@kernel•org>,
Linux Next Mailing List <linux-next@vger•kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger•kernel.org>
Subject: Re: linux-next: new objtool warnings
Date: Mon, 3 Nov 2025 20:32:56 +1100 [thread overview]
Message-ID: <20251103203256.5ac39302@canb.auug.org.au> (raw)
In-Reply-To: <20251103091006.GV3245006@noisy.programming.kicks-ass.net>
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Hi Peter,
On Mon, 3 Nov 2025 10:10:06 +0100 Peter Zijlstra <peterz@infradead•org> wrote:
>
> On Fri, Oct 31, 2025 at 11:15:15AM +1100, Stephen Rothwell wrote:
> >
> > My x86_64 allmodconfig builds started producing these warnings today:
> >
> > vmlinux.o: warning: objtool: user_exc_vmm_communication+0x15a: call to __kasan_check_read() leaves .noinstr.text section
> > vmlinux.o: warning: objtool: exc_debug_user+0x182: call to __kasan_check_read() leaves .noinstr.text section
> > vmlinux.o: warning: objtool: exc_int3+0x123: call to __kasan_check_read() leaves .noinstr.text section
> > vmlinux.o: warning: objtool: noist_exc_machine_check+0x17a: call to __kasan_check_read() leaves .noinstr.text section
> > vmlinux.o: warning: objtool: fred_exc_machine_check+0x17e: call to __kasan_check_read() leaves .noinstr.text section
> >
> > I can't easily tell what caused this change, sorry.
>
> What compiler? This smells like a broken compiler, these are all
> noinstr and that very much has __no_sanitize_address.
And today I didn't get them. So who knows? I did *not* change compiler
since Friday.
$ /usr/bin/x86_64-linux-gnu-gcc --version
x86_64-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0
Cross compiler hosted on ppc64 le.
--
Cheers,
Stephen Rothwell
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next prev parent reply other threads:[~2025-11-03 9:33 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-31 0:15 linux-next: new objtool warnings Stephen Rothwell
2025-11-03 9:10 ` Peter Zijlstra
2025-11-03 9:32 ` Stephen Rothwell [this message]
2025-11-03 9:38 ` Peter Zijlstra
2025-11-05 3:30 ` Stephen Rothwell
2025-11-05 8:56 ` Peter Zijlstra
2025-11-05 10:00 ` Peter Zijlstra
2025-11-05 10:02 ` Peter Zijlstra
2025-11-05 10:10 ` Peter Zijlstra
2025-11-05 17:07 ` Nathan Chancellor
2025-11-05 19:16 ` Peter Zijlstra
2025-11-05 20:09 ` Nathan Chancellor
2025-11-06 11:48 ` Peter Zijlstra
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