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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 485D1C004C0 for ; Mon, 23 Oct 2023 13:15:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229959AbjJWNPb (ORCPT ); Mon, 23 Oct 2023 09:15:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48902 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229615AbjJWNP3 (ORCPT ); Mon, 23 Oct 2023 09:15:29 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 62FC5C4; Mon, 23 Oct 2023 06:15:26 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 7CE9621AE4; Mon, 23 Oct 2023 13:15:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1698066924; h=from:from:reply-to:reply-to:date:date:message-id:message-id:to:to: cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=uOQPaskcC7n4iiCUTkQQkbtJLmrXJj+rmIAUgG5duTQ=; b=G/1YfaHh+O+GXrvxNXvsWZJGiPHD7LEKz4R0zZuyKeQVwnMikP+nYk0istXhqzsMVJLQHF I5mSRnQL6vtnt4a5vnWW5Q0SXxU0it1MBlQGzIFB+thH7GtksN9EktPLiF7iUJhwLOln4i d5jVFWO3ttZgUVJWVeBeSpnGP0uZbys= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1698066924; h=from:from:reply-to:reply-to:date:date:message-id:message-id:to:to: cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=uOQPaskcC7n4iiCUTkQQkbtJLmrXJj+rmIAUgG5duTQ=; b=zoQ1NDUKbAvGBaiZD7n5ud/5Nsbt8eafK4Mdy9UQiNJTn21MdQ4mJpXw6tB+yb+D5/wG3L XKt9Dw/x65sGe9CQ== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 33DEF132FD; Mon, 23 Oct 2023 13:15:24 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id +4XNC+xxNmUsRwAAMHmgww (envelope-from ); Mon, 23 Oct 2023 13:15:24 +0000 Date: Mon, 23 Oct 2023 15:08:30 +0200 From: David Sterba To: syzbot Cc: clm@fb.com, dsterba@suse.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [btrfs?] BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! (4) Message-ID: <20231023130830.GG26353@twin.jikos.cz> Reply-To: dsterba@suse.cz References: <000000000000d005440608450810@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000d005440608450810@google.com> User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12) Authentication-Results: smtp-out1.suse.de; none X-Spamd-Result: default: False [-1.30 / 50.00]; ARC_NA(0.00)[]; HAS_REPLYTO(0.30)[dsterba@suse.cz]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; URI_HIDDEN_PATH(1.00)[https://syzkaller.appspot.com/x/.config?x=f27cd6e68911e026]; TAGGED_RCPT(0.00)[b2869947e0c9467a41b6]; REPLYTO_ADDR_EQ_FROM(0.00)[]; NEURAL_HAM_LONG(-3.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; BAYES_HAM(-0.00)[22.52%]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; SUBJECT_HAS_EXCLAIM(0.00)[]; NEURAL_HAM_SHORT(-1.00)[-1.000]; RCPT_COUNT_SEVEN(0.00)[8]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; SUSPICIOUS_RECIPS(1.50)[]; SUBJECT_HAS_QUESTION(0.00)[] Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Oct 21, 2023 at 07:40:53PM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 78124b0c1d10 Merge branch 'for-next/core' into for-kernelci > git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci > console output: https://syzkaller.appspot.com/x/log.txt?x=1557da89680000 > kernel config: https://syzkaller.appspot.com/x/.config?x=f27cd6e68911e026 > dashboard link: https://syzkaller.appspot.com/bug?extid=b2869947e0c9467a41b6 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > userspace arch: arm64 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=137ac45d680000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16e4640b680000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/bd512de820ae/disk-78124b0c.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/a47a437b1d4f/vmlinux-78124b0c.xz > kernel image: https://storage.googleapis.com/syzbot-assets/3ae8b966bcd7/Image-78124b0c.gz.xz > mounted in repro: https://storage.googleapis.com/syzbot-assets/d5d514495f15/mount_0.gz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+b2869947e0c9467a41b6@syzkaller.appspotmail.com > > BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! #syz invalid This is a frequent warning, can be worked around by increasing CONFIG_LOCKDEP_CHAINS_BITS in config (18 could be a good value but may still not be enough).