From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on gnuweeb.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) by gnuweeb.org (Postfix) with ESMTPS id 702277F612 for ; Thu, 12 May 2022 08:17:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=dYzfOK1yyq8AEwmqxkCqMkqbjmK+8XEL4Qwke3UqJ2o=; b=Ec/RIDgryQPhFMN3vweDGXRhKN XeDfPljFrMb+oilFqohni3pvhModRg38PYSjWhU1LOPwP28l20voa9XFPeXDE9ds60yxtIvItZTh2 N1lt26tm/8paLVJ7NvoHMYxzSRvzUMo3IRITyQ69o18PkM6p68qBV5m6bfDgdim1fVuf4MwNVfd6c degtJFQGauGYZy7PHEEy6Tdz4aaqrPb3gEuQRW4aVv6AQPFhrZxYHIVaPZXe6aUZ4gDuGe+ZTytgZ 2B8sLtT4eMcsge4gm/ofxKLXP2255dMjWG5+8OIGTBGlJ9rLTD07+FSm0txdca2Ur3+70ZJ/ojVGj 7IbUdVGQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=worktop.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1np40W-00DSDK-47; Thu, 12 May 2022 08:17:13 +0000 Received: by worktop.programming.kicks-ass.net (Postfix, from userid 1000) id AD5F198100A; Thu, 12 May 2022 10:17:09 +0200 (CEST) Date: Thu, 12 May 2022 10:17:09 +0200 From: Peter Zijlstra To: kernel test robot Cc: kbuild-all@lists.01.org, GNU/Weeb Mailing List , linux-kernel@vger.kernel.org, Sasha Levin , Borislav Petkov Subject: Re: [ammarfaizi2-block:stable/linux-stable-rc/queue/5.15 146/150] kernel/futex.o: warning: objtool: futex_atomic_op_inuser()+0xb8: unreachable instruction Message-ID: <20220512081709.GD76023@worktop.programming.kicks-ass.net> References: <202205120956.qLpGQurX-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202205120956.qLpGQurX-lkp@intel.com> List-Id: On Thu, May 12, 2022 at 10:00:33AM +0800, kernel test robot wrote: > tree: https://github.com/ammarfaizi2/linux-block stable/linux-stable-rc/queue/5.15 > head: 305e905f70311e1b49cc730931a19c3e364f4d8c > commit: 45dc9d706619a6814e4063d5431483f94badb5a1 [146/150] x86: Add straight-line-speculation mitigation > config: x86_64-randconfig-m001-20220509 (https://download.01.org/0day-ci/archive/20220512/202205120956.qLpGQurX-lkp@intel.com/config) > compiler: gcc-11 (Debian 11.2.0-20) 11.2.0 > reproduce (this is a W=1 build): > # https://github.com/ammarfaizi2/linux-block/commit/45dc9d706619a6814e4063d5431483f94badb5a1 > git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block > git fetch --no-tags ammarfaizi2-block stable/linux-stable-rc/queue/5.15 > git checkout 45dc9d706619a6814e4063d5431483f94badb5a1 > # save the config file > mkdir build_dir && cp config build_dir/.config > 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 > > All warnings (new ones prefixed by >>): > > >> kernel/futex.o: warning: objtool: futex_atomic_op_inuser()+0xb8: unreachable instruction > -- > >> mm/madvise.o: warning: objtool: madvise_behavior()+0x69: unreachable instruction > -- > >> kernel/bpf/btf.o: warning: objtool: __btf_resolve_size()+0x72: unreachable instruction Would it be possible for the robot to include the output of this script: https://lkml.kernel.org/r/3eb3f091fd6bd9caba50392ceab98ce756804f3b.1650578171.git.jpoimboe@redhat.com for each objtool warning it gives (as run on vmlinux.o): $ ./scripts/objdump-func build-output/vmlinux.o futex_atomic_op_inuser $ ./scripts/objdump-func build-output/vmlinux.o madvise_behavior $ ./scripts/objdump-func build-output/vmlinux.o __btf_resolve_size etc.. that would make it easier to see what the problem is without having to reproduce the build. A super wild guess; but try this commit: 1ffbe4e935f9 ("objtool: Default ignore INT3 for unreachable")