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 471B6CDB474 for ; Tue, 17 Oct 2023 19:49:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344421AbjJQTtY (ORCPT ); Tue, 17 Oct 2023 15:49:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43016 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235083AbjJQTtW (ORCPT ); Tue, 17 Oct 2023 15:49:22 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4EFE09E; Tue, 17 Oct 2023 12:49:20 -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-out2.suse.de (Postfix) with ESMTPS id 6FA251F8B0; Tue, 17 Oct 2023 19:49:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1697572158; 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=+bNd8tVs25f+1D5Zk82Lm7dC1cpiHULfm19EiFqzHTo=; b=a7kton5ZFsANcHtkX1el0nXOmudqTq92A0HFIbrXpZ7nCMc2JlZOV+k1pvfs29Y0fwiB36 JhMMHEGEfdrLLf5+7jFesN2bgN1iB+uLYyngMfMwB1QPqQbXzyATyxNFrk77AezY0cUvPS OkTDRtcB4XXb58b2FwlzuQ9PpNCSMLw= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1697572158; 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=+bNd8tVs25f+1D5Zk82Lm7dC1cpiHULfm19EiFqzHTo=; b=+IFQe0MzS362qW/vzwqW0JpZsv4YqZ1iFpgH3Iu2bImTy0Vq47aDOMg0eVscQeJBIHTw8l VQWexSULkODfh+DQ== 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 2E99113597; Tue, 17 Oct 2023 19:49:18 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id fMOYCj7lLmXcOwAAMHmgww (envelope-from ); Tue, 17 Oct 2023 19:49:18 +0000 Date: Tue, 17 Oct 2023 21:42:28 +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! (3) Message-ID: <20231017194228.GD2211@twin.jikos.cz> Reply-To: dsterba@suse.cz References: <00000000000019171d0607eb8786@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00000000000019171d0607eb8786@google.com> User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12) Authentication-Results: smtp-out2.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)[6aa88a2d31fbec170f8b]; REPLYTO_ADDR_EQ_FROM(0.00)[]; NEURAL_HAM_LONG(-3.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; BAYES_HAM(-0.00)[31.66%]; 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 Tue, Oct 17, 2023 at 08:53:45AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: c295ba49917a 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=135804fe680000 > kernel config: https://syzkaller.appspot.com/x/.config?x=f27cd6e68911e026 > dashboard link: https://syzkaller.appspot.com/bug?extid=6aa88a2d31fbec170f8b > 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=17d48d09680000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13498275680000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/045554f2bee6/disk-c295ba49.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/ba2705f8a872/vmlinux-c295ba49.xz > kernel image: https://storage.googleapis.com/syzbot-assets/e36242e95b79/Image-c295ba49.gz.xz > mounted in repro #1: https://storage.googleapis.com/syzbot-assets/39a4eecc45c3/mount_0.gz > mounted in repro #2: https://storage.googleapis.com/syzbot-assets/3a9106a526c9/mount_1.gz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+6aa88a2d31fbec170f8b@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).