From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9E07AC433EF for ; Thu, 16 Jun 2022 06:35:15 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 1BB936B0072; Thu, 16 Jun 2022 02:35:15 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 16B6A6B0073; Thu, 16 Jun 2022 02:35:15 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 05A8B6B0074; Thu, 16 Jun 2022 02:35:15 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id EE9A26B0072 for ; Thu, 16 Jun 2022 02:35:14 -0400 (EDT) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay11.hostedemail.com (Postfix) with ESMTP id C244081344 for ; Thu, 16 Jun 2022 06:35:14 +0000 (UTC) X-FDA: 79583136948.17.84F37B0 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by imf05.hostedemail.com (Postfix) with ESMTP id 52053100078 for ; Thu, 16 Jun 2022 06:35:14 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id CDB3E68AA6; Thu, 16 Jun 2022 08:35:10 +0200 (CEST) Date: Thu, 16 Jun 2022 08:35:10 +0200 From: Christoph Hellwig To: Qu Wenruo Cc: Christoph Hellwig , dsterba@suse.cz, syzbot , akpm@linux-foundation.org, clm@fb.com, dsterba@suse.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, willy@infradead.org Subject: Re: [syzbot] KASAN: use-after-free Read in copy_page_from_iter_atomic (2) Message-ID: <20220616063510.GA5608@lst.de> References: <0000000000003ce9d105e0db53c8@google.com> <00000000000085068105e112a117@google.com> <20220613193912.GI20633@twin.jikos.cz> <20220614071757.GA1207@lst.de> <2cc67037-cf90-cca2-1655-46b92b43eba8@gmx.com> <20220615132147.GA18252@lst.de> <00bbda63-dc00-05c0-4244-343352591d98@gmx.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00bbda63-dc00-05c0-4244-343352591d98@gmx.com> User-Agent: Mutt/1.5.17 (2007-11-01) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1655361314; a=rsa-sha256; cv=none; b=7m6t2l4VlkbcLN2PFAseHgRUPXgwL5hdOG0RX7Gh9CO3LmxBF42wcUvKLzwkVWRs5VXPlk zeveHrW3sz0hA4/QmFRG5d0BLDkrWfrjzgS36x1Jz+v31CDmH4u89xMpC+OGQSWBe8aBMJ aTkmohYydRkQMHc1mXMGitAvvIRPh3E= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=none; spf=none (imf05.hostedemail.com: domain of hch@lst.de has no SPF policy when checking 213.95.11.211) smtp.mailfrom=hch@lst.de; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1655361314; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UkEQpl9oG4UAiReXpKpQ12WPSYk8VOykHiANRLYFLkM=; b=AQm13GE2x4An62dpViRhiaWgg5VRpyc1JlSfnNpOSWC6dG+yODC99Yd/pV3SPJ6ktr5u/7 l+hbcIFjBYNwQzoLGN9h5ON/EmWn8gwIMaE1pdqS0isH+NkuWu/RWuu1CX0kftS/9C2E2F 9i2rKR4um6dzLQorPTng+mt1/hG0YvI= Authentication-Results: imf05.hostedemail.com; dkim=none; spf=none (imf05.hostedemail.com: domain of hch@lst.de has no SPF policy when checking 213.95.11.211) smtp.mailfrom=hch@lst.de; dmarc=none X-Rspam-User: X-Stat-Signature: jgi65c816n5q7czcss6mshotsdo9hxk6 X-Rspamd-Queue-Id: 52053100078 X-Rspamd-Server: rspam08 X-HE-Tag: 1655361314-206169 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Jun 16, 2022 at 05:27:04AM +0800, Qu Wenruo wrote: >> And how do I find out the logic address of the tree root? > > For tree root, "btrfs ins dump-super | grep '^root\s'. > > For other tree blocks, "btrfs ins dump-tree " then with other other > keywords to grab. Thanks a lot !