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 6722251E429 for ; Tue, 8 Sep 2026 09:32:21 +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=1788859943; cv=none; b=m4r1zdGUYe89B5jA9JCk4K6sHHhtA5lu05r7NZ1REd1RbdJTLhRgTozDQeQtTAVMDn1Cg7TbVqZMFNmPErM1ATgPcI/86FLHIgiffTexXHTe48JKPmbpHQhPnv/bOapqOZ2YlesyhFr7cUqAqXT2i9TqjntHmjrMOOyD/j8qscY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788859943; c=relaxed/simple; bh=BqbMqlm4FDsGzMYuRIEmsBVHqYZ0z3pDff8KoOkJopM=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=fjSdDUcg3CwxpgwaGpTGS0QqXTkqlCpV+wQB5lqZ2ek1e4MmcxpFWQwtzeeUKufnUwaphqZur3xk8tnZ9EZhN35RZVQmScx+r7EwVtcaWyAxVp5l53JVp3krdPjRgfEISwOu8V5/UgcGxFf2Cp8sn5HbSlSxn2ZIMMXrg03CkEA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=is6KQl01; 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="is6KQl01" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 17C3E1F00A3A; Tue, 8 Sep 2026 09:32:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788859941; bh=idOnIsbF4aqGbbwgFi07xd+2BwFsQcBoIJ7fhbX7sIA=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=is6KQl01jgWMql6FMQr1xk4ZLTp10tUIpdaw1BuP5Rf1d3EdS7dMLKaiPRZThwuqD Zz3wcM39/XWli/MFxs5l2NuNPSjlU8qMWXqNptPFuT4CFfVUNdkDthAFS1YK6zQLS1 nmtpMdpWmBqCCe2wIfrgXYPvi8EvGSNXfa7xlVQe2pGyMROlgXFPsY+GF1r/q/OwTB p+s5pjSRGKJFXbW5tWnRNXxcQRntY9B3rZ83+pI7dTryfPaOjIWD6J8mfxP/35Wwg4 NCNXkDMfDYhL3azEtB6DmMI4zns9IM5YqZaboMTZZIo95XbBv3wHc3xcP0mVoCNIyl 60gxvEX45F9Tw== Message-ID: <90cd8ace-b135-45d6-815b-bf7329cbfa4d@kernel.org> Date: Tue, 8 Sep 2026 11:32:18 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [mm?] WARNING in vma_add_pgoff Content-Language: en-US To: "Lorenzo Stoakes (ARM)" , syzbot Cc: 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 References: <20260907192517.564ea15aa8c9d47669b3a81f@linux-foundation.org> <6a9f8bc6.f614420e.2bf292.0005.GAE@google.com> From: "Vlastimil Babka (SUSE)" Autocrypt: addr=vbabka@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit 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. 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. > >> >> 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