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 6F48E21257E; Wed, 19 Nov 2025 05:52:04 +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=1763531532; cv=none; b=ZFb7NGX9hNmRv1n1JIPgUKwogK0hB3FxyijDacJ26ErXHl9GOe5Cr0RQ8E1hhpoF0ZDll0b4/mVbaaz73XX/3RdbwqvBbD1MOBImqoanB+Iem+JkXFFLdXiQFk6SGbMnt3IK8EkHST341jj86UB0BBJn2o/VyR5qoEtFQQjKnpo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763531532; c=relaxed/simple; bh=I8I1AprjDBUOj7jue2dl3t9Iqf4Cwq10RSkL95tBmzw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=QPFTSr/g9GCHgV6Cu9eLPec5Af951i/DcbeEwOHokcwqCeTwhWIkBp0akLFPMTNinR/+DI3F4oJoPwY2HvNroueZnsdgloBSOIBxCjoxykHzu1br+J4O82ugGLZ5ZZlZSdMxNhWnPF7p8PxECDkS+510qY84vCQnp1DX2Mn5BbU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (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=DCDGMOIt; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (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="DCDGMOIt" 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=I8I1AprjDBUOj7jue2dl3t9Iqf4Cwq10RSkL95tBmzw=; b=DCDGMOItsmmDvLY2JYHYouj2Xc OMO73rZ6noq0tsz/j4b9DcP9NFeBYTfCbxfUML6nP9c2GxYLjlRYa787wx5GKEyAsMLJgZNRbOfd9 NAAe/QcIO5vwHMXsvm0u7IRRN+j5fetrVEXgu/rAqG9m4KGIs7BTr0t3S8mqm43c2TH+k6j+erJwd OuF+otZTirQnwvM+rCvPmSCSsRzaKg6eCV7DFxxX99OsbSnkmCR6v8VEOjtDAH8m3zFTkL9VENnRX ISVNVDCFed/qMXULXTivoZJDh+55W0Pa5NmvrW8V9YxisnUpjpQsyv1w2o63rKf3sSBpF4l8wUhKe SxK9wpqg==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vLb6p-00000002Rs3-1eOi; Wed, 19 Nov 2025 05:52:03 +0000 Date: Tue, 18 Nov 2025 21:52:03 -0800 From: Christoph Hellwig To: Andrii Nakryiko Cc: "Darrick J. Wong" , Matthew Wilcox , Christoph Hellwig , SHAURYA RANE , akpm@linux-foundation.org, shakeel.butt@linux.dev, eddyz87@gmail.com, andrii@kernel.org, ast@kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linux.dev, skhan@linuxfoundation.org, david.hunter.linux@gmail.com, khalid@kernel.org, syzbot+09b7d050e4806540153d@syzkaller.appspotmail.com, bpf Subject: Re: [PATCH] mm/filemap: fix NULL pointer dereference in do_read_cache_folio() Message-ID: References: <20251117164155.GB196362@frogsfrogsfrogs> <20251118161220.GE196362@frogsfrogsfrogs> Precedence: bulk X-Mailing-List: linux-fsdevel@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: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Tue, Nov 18, 2025 at 11:38:36AM -0800, Andrii Nakryiko wrote: > We have plenty of build ID tests in BPF selftest that validate this > functionality: And none of them is run on a wide variety of file systems, presumably because they are only run by BFP developers. IFF we allow for magic file access methods it needs to be part of regular file system testing.