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[2604:1380:4601:e00::3]) by mx.google.com with ESMTPS id a640c23a62f3a-a626c800fb8si565479866b.169.2024.05.28.19.02.33 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 May 2024 19:02:33 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-193324-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3; Authentication-Results: mx.google.com; dkim=pass header.i=@linux.org.uk header.s=zeniv-20220401 header.b=QPRIznJ4; arc=pass (i=1 dkim=pass dkdomain=linux.org.uk dmarc=pass fromdomain=zeniv.linux.org.uk); spf=pass (google.com: domain of linux-kernel+bounces-193324-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) smtp.mailfrom="linux-kernel+bounces-193324-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=zeniv.linux.org.uk Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by am.mirrors.kernel.org (Postfix) with ESMTPS id 591EB1F2B252 for ; Wed, 29 May 2024 02:02:33 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id F24E915B125; Wed, 29 May 2024 02:01:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b="QPRIznJ4" Received: from zeniv.linux.org.uk (zeniv.linux.org.uk [62.89.141.173]) (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 A0AD715A856; Wed, 29 May 2024 02:01:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.89.141.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716948096; cv=none; b=MD7eYoUq6JKOpL3k7E5MzsrGDLrhkoZHICk7WvfE6hM6PY7kakoObIljnPvLEimV9cP9aKSVUVKQNQcXOFNNvGhENuobiHM9JkMWrjKLd/hvZyy1avK7rtvAuRfEe9HDhUQkPChwpzKSlOwzi2fQxjtCCa8bX4IXTr5j1u+Y7Z8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716948096; c=relaxed/simple; bh=cjm0d7iJq0ZZy8NXDanN6QOQ8yyu7l9oVdu/MkVpRNY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=iDdjpKuv8o+K6onjgpSc+cEMx2ghOMctnXIo7N2f0B/0sQKw2nk1l7t/mDqSKSKis+kNwf7Smuiz0WIS0ELs/WpBr9jEiMMKIuTHq7oWSYS9rRxI1mwUgkYXp4VWw055/lMn5qwDNSkHXCytJNmJQB6f+o9BEiUcAEGIqI2V7fg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk; spf=none smtp.mailfrom=ftp.linux.org.uk; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b=QPRIznJ4; arc=none smtp.client-ip=62.89.141.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ftp.linux.org.uk DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=linux.org.uk; s=zeniv-20220401; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=W7VynibdGQv1JFv2RbWXbyZjg4WNXsABmpDa7JG50io=; b=QPRIznJ4SQbjdTZHwCXUdxD3wi iguHnEQ10cLXK9n/V6VJZhgX2zIqnZfMPHSXksRjo2pwj/EI6Gr2ohFokkT9uVfDKXI/4opg/e+ff L89UVW0ZOu/7ryKAyEOv4+McyGolM1uCZP+a8PmBKup3+qq+HOiFeFvJ7/jVLB6ANTsUpgMOg+bcG mJYr014oSDEnektFQWy3cpt2WploE0IkkcJgSY4UmzrGrLJhGeGjVuiZ3dlAqQYjWKMldPejk0SaF oJSyXY1v8bKlSJ/eCTHoJEqI0Fdg/D/rgLROJ10rBi9ka7KI/2GcrIewzP48CA+9wXbxyJ8p0IJOW JsA82X1Q==; Received: from viro by zeniv.linux.org.uk with local (Exim 4.96 #2 (Red Hat Linux)) id 1sC8d8-001pva-22; Wed, 29 May 2024 02:01:30 +0000 Date: Wed, 29 May 2024 03:01:30 +0100 From: Al Viro To: Edward Adam Davis Cc: syzbot+fe42a669c87e4a980051@syzkaller.appspotmail.com, adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Subject: Re: [PATCH] fs/dcache: fix warning in ext4_xattr_inode_lookup_create Message-ID: <20240529020130.GK2118490@ZenIV> References: <0000000000002b03350619853096@google.com> <20240529015652.GJ2118490@ZenIV> 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: <20240529015652.GJ2118490@ZenIV> Sender: Al Viro On Wed, May 29, 2024 at 02:56:52AM +0100, Al Viro wrote: > On Wed, May 29, 2024 at 09:15:02AM +0800, Edward Adam Davis wrote: > > ext4_xattr_inode_lookup_create() will use s_root, so set it to NULL > > after do_one_tree(). > > Why, in the name of everything unholy, would eviction of dentries need > to set any kind of xattrs? IOW, that might make the testcase STFU, but something odd is happening there and I would really like to understand the details before we go that way.