From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 5F26A239E63; Mon, 29 Sep 2025 06:40:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759128043; cv=none; b=Al/Xruw/JYsXFw+GnjfEhOi4mdmCJ9M1DAQX9h8zxGrxb/REyxaXh8kQJAZ/Iu7jBCQTFKQcOUYmm5GqS4B+vdCllsF8As9zgX8N3+qG+ygWTe2ObVatibBdMLcqEIBHLzaO0JTcuIu2MbzqZy9U9G/AkbyN3dx6XAiKFv2oJao= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759128043; c=relaxed/simple; bh=YacQbj1YmkiJVhrtk3+KVfBFzhjCzjCVTO6GT84rzec=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=QaMQdJHoXJzvEy3qBG7zJEAmjZrZzU8RF9JBJO8cDVyhaa1emDOBJciCFR36JnQFqNpStdkqKc2VJWrNoEWZ8HROaMFVAob262MPMscc2AVgfb4VEfNED9pDMalA/stjG+HQSrB5UH8ldAkpkLZvvMY0Dn8bo7RNyPok3Or+c1c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=b4e8nJQX; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="b4e8nJQX" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; 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=YacQbj1YmkiJVhrtk3+KVfBFzhjCzjCVTO6GT84rzec=; b=b4e8nJQXOeW+6CokvZQpUpX5YN v1Xa/jLEtCpGBcZrEmKuTYpfa+RbISQjDEfwwqwBYXMIMkBKLLrt1iRfrbd5pCYHSEOUqa2YLpSFN Hxf+spZ0GkJ2MGJmyjpaiaLmdwHGDRd8QdE0Rqv5h25j26GBq4yl8OkbTtsCxhuUhDzZUbZFNwZyS /3c/ZVOfu/u1Kl2L4Mpr2s+HqR9Y47zTpV7V5WAnNRjenrA89Pa/WHgimhsqwF6WRCq8pXQex6DUA dsm9aZFA0BFVAYTSx3MokPjZjAGRjDmi0ZW9b6Q+Unt7n0vh24/+DqS/3Mnt3Xd+VgKzzPLvWnBoe A+ndfkZA==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1v37Yn-00000001VVX-0STq; Mon, 29 Sep 2025 06:40:33 +0000 Date: Sun, 28 Sep 2025 23:40:33 -0700 From: Christoph Hellwig To: syzbot Cc: akpm@linux-foundation.org, apopple@nvidia.com, baohua@kernel.org, byungchul@sk.com, cem@kernel.org, david@fromorbit.com, david@redhat.com, gourry@gourry.net, harry.yoo@oracle.com, joshua.hahnjy@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-xfs@vger.kernel.org, matthew.brost@intel.com, mhocko@suse.com, penguin-kernel@i-love.sakura.ne.jp, rakie.kim@sk.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, willy@infradead.org, ying.huang@linux.alibaba.com, ziy@nvidia.com Subject: Re: [syzbot] [mm?] WARNING in xfs_init_fs_context Message-ID: References: <6861c281.a70a0220.3b7e22.0ab8.GAE@google.com> <68d973fc.a00a0220.102ee.002b.GAE@google.com> Precedence: bulk X-Mailing-List: linux-xfs@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: <68d973fc.a00a0220.102ee.002b.GAE@google.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html This looks like slub turning a < PAGE_SIZE allocation into a order > 0 folio allocation, which the page allocator then complains about. We'll either need to make slab not propagate < PAGE_SIZE allocations to order > 0 page allocation, or make the page allocator handle the latter. And XFS shouldn't need the NOFAIL allocation here, but this will break things elsewhere as well.