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 C6EA64A341A for ; Tue, 8 Sep 2026 10:24:42 +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=1788863083; cv=none; b=sgozJZK9Vj5OBqqW+n3uiWrwWUhNgzOFtKYatgMVJfH64TbyevfxCren7dqwZ5MXRCE8kdDt97taFKsrySMrw1vhbkJBSFXhi1miHCIR4QGORpQCNDp7GiEL8f5reFzV5kln7clTAISED3Pds+yhb6oa4x8195hK0RNkeKKFUW4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788863083; c=relaxed/simple; bh=sOdgDm5hYXAMz1Fk0hZ7+eStPTAB4DxUtZSperEet60=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=grIOoAUUpy1ra57rA+XGk7BrdMyKn9Hr6YkwL3v6KDCqjNuwEuVmtrqaxIvWnrwTqeO34PEgbUoyMPH7zGC+Y+3BHLY1vuTVaS0E0pTz09wpkEidYENb0ertA/pmCejbucxRhWYkYzWfMhMir7KwP2NmJjSXXWhw0Tt/Blggpfc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=M2GZ3Pvd; 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="M2GZ3Pvd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5D2FB1F00A3A; Tue, 8 Sep 2026 10:24:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788863082; bh=lIUkCbJ7shfPROFJxtTfla+/4+rlDGuo3hAIW5bFyFM=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=M2GZ3PvdvIIc3QHnujmylrLk0OTC1XZmWij350Oprx7fKaDYxIML4dZLSBUQmGXEi l1zk0PNDiYHX53ePOujhKOKM6ffB8QEQ8grv+Lh5FnKCZDboK8BKZQDmQnFLDQkXeM RVpQXS1AQ+3izISLfVaZ7nhOaJVFlKqSc8qi9D4Z6vfzQdoMUnYLqmrhwQkyRfBUop jxZSASGal/6kgi0HY15mZisXXRp2g6FiruA3KjIOac/TwCF39Bu2BfPiwSA6tkZ9aI SOU9epFApm7zgV/JtqvniUyoRmE0Db2JrBLsjAU518E9R9bZS+LvLrfH47moyQ0vVt RM8fTACARSHkw== Date: Tue, 8 Sep 2026 11:24:37 +0100 From: "Lorenzo Stoakes (ARM)" To: "Vlastimil Babka (SUSE)" Cc: syzbot , akpm@linux-foundation.org, jannh@google.com, liam@infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, pfalcato@suse.de, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [mm?] WARNING in vma_add_pgoff Message-ID: References: <20260907192517.564ea15aa8c9d47669b3a81f@linux-foundation.org> <6a9f8bc6.f614420e.2bf292.0005.GAE@google.com> <90cd8ace-b135-45d6-815b-bf7329cbfa4d@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@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: <90cd8ace-b135-45d6-815b-bf7329cbfa4d@kernel.org> On Tue, Sep 08, 2026 at 11:32:18AM +0200, Vlastimil Babka (SUSE) wrote: > On 9/8/26 11:25, Lorenzo Stoakes (ARM) wrote: > > On Mon, Sep 07, 2026 at 09:15:02PM -0700, syzbot wrote: > >> Hello, > >> > >> syzbot has tested the proposed patch and the reproducer did not trigger any issue: > >> > >> Reported-by: syzbot+c6879dc677a017f0a21b@syzkaller.appspotmail.com > >> Tested-by: syzbot+c6879dc677a017f0a21b@syzkaller.appspotmail.com > > > > Yup there we are :) > > > > Why is this constantly duplicating I wonder... > > Going back to the first mail: > > syzbot found the following issue on: > > HEAD commit: 5445d6419962 arm64: Don't read GMID_EL1 when MTE is disabled > git tree: > git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci > > We can see it's based from 7.3-rc1: > > https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-kernelci > > And since the problem was introduced there, all kinds of development trees > for 7.4 (or even pending hotfixes for 7.3) based on 7.3-rc1 will now have it. Yeah but I marked this #syz dupe? I guess that's cleared maybe for a new job? > > I guess syzbot has to learn to recognize it's a known problem and ignore it, > or have some repo of known important fixes merged after rc1 it applies on > top of such development trees, as they generaly won't be rebased to later rcs. Yeah, be nice if 'hey check this upstream commit does it fix it?' *syzbot confirms yes* could -> mark reports redundant. But maybe harder to actually do than that? > > > > >> > >> Tested on: > >> > >> commit: 35b0fb39 mm/mremap: reset unfaulted VMA page offset fo.. > >> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > >> console output: https://syzkaller.appspot.com/x/log.txt?x=15e13af9580000 > >> kernel config: https://syzkaller.appspot.com/x/.config?x=56ed23170c168d4c > >> dashboard link: https://syzkaller.appspot.com/bug?extid=c6879dc677a017f0a21b > >> compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 > >> userspace arch: arm64 > >> > >> Note: no patches were applied. > >> Note: testing is done by a robot and is best-effort only. > > > > -- > > Cheers, Lorenzo > -- Cheers, Lorenzo