From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0AEE83749E5; Tue, 21 Jul 2026 14:03:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784642641; cv=none; b=IkDUMvDCIi9i0lJWlTvWuimqub0vM63ywyYkfa1zg1AIAys6Z9X0OmTI9M4FhI7KsnoPXXKRnK/Dl8yQIR6zMSZJGpJ7ICjFVOaMqaklL/pTK97kPUOENTChev03LLbdmkIF8VLFse+qvY7HMHSQaBMq2YEVkSMsPsQEjgrKlG4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784642641; c=relaxed/simple; bh=6nZsczli4p7abvIoJRfHqGza9jvFGRUey0MKu3w09fY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=CE8Hfrda8a+Pq3e85tRZqlBO2xEhxwriWv+5FwncUVtNzit2enG3j++B49brrDKpwiTPwAV4xVguThwzVoqn1JiDG87p+0BeQKJH9VXE9ZcwEtBM/LwxRZUkcpUPMfrTiq1BLbTnWmi8V3z5tnmcY5/PxV1GBXopezKws3t3V50= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Rz5npCop; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Rz5npCop" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 35E451F00A3A; Tue, 21 Jul 2026 14:03:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784642639; bh=76v2widEs4BgjKivyhUtC90KrnKgRTssA2kps1ekDLs=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=Rz5npCoppyyM90Wciu+ATlgKhsGgI4dr48/aL4O7viDIdpeYaE6ZysIpxu7XbYRHw OistUPRbqoF/+O1Ype3J5XexA2DFfKbXunLZozojrKa3ZzA+MfK3KYlCSmibpbXj7o tbAWwsedXaUbVYxL7ansToqCuTL4ZBLSzu5VwiVarwTl+IiP1qxTbw2gOpqTg2302V MMpr8DpoDhriki1zfoMN5IkaXb4YG0fBJ2bYCfmkVYotOFDqZO0HBY3N3Ftfm4CpEH gYGrmI5s5VIyWrakm3jSmTLBGqs2+RxdcqLF0WYDB0wLfwj6g+FNvPTAeRsJNdXNdR t1Ry8V3VfXgXg== Date: Tue, 21 Jul 2026 15:03:41 +0100 From: "Lorenzo Stoakes (ARM)" To: Borislav Petkov Cc: Mike Rapoport , syzbot , "Denis V. Lunev" , Vishal Moola , dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, linux-next@vger.kernel.org, luto@kernel.org, mingo@redhat.com, peterz@infradead.org, sfr@canb.auug.org.au, syzkaller-bugs@googlegroups.com, tglx@kernel.org, x86@kernel.org Subject: Re: [syzbot] [kernel?] linux-next test error: WARNING: locking bug in change_page_attr_set_clr Message-ID: References: <6a5e53ed.f1649fcc.2a4208.0574.GAE@google.com> <20260721022448.GDal7YcN_64rndpnHI@fat_crate.local> <20260721135323.GAal9504VvxYHpcPtd@fat_crate.local> Precedence: bulk X-Mailing-List: linux-next@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260721135323.GAal9504VvxYHpcPtd@fat_crate.local> On Tue, Jul 21, 2026 at 06:53:23AM -0700, Borislav Petkov wrote: > On Tue, Jul 21, 2026 at 01:39:45PM +0100, Lorenzo Stoakes (ARM) wrote: > > OK so this is a screw up with merging. > > > > Two fixes are applied at once here and they are NOT compatible :) > > > > Denis's ([0]) holds a spin lock over the operation during which an older > > revision of mine ([1] - current, probable next revision [2]) tries to take a > > sleeping mmap lock, hence the report. > > Lemme guess: if those were merged by the same tree - tip - where arch/x86/ > changes belong, we would've caught it, right? > > Pff. You mean the series that changes core mm and has strict dependencies on core mm changes and solves issues elsewhere than x86 CPA, that one should have gone through the x86 tree? > > -- > Regards/Gruss, > Boris. > > https://people.kernel.org/tglx/notes-about-netiquette Thanks, Lorenzo