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 AB9D2C04A95 for ; Wed, 28 Sep 2022 07:49:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233876AbiI1HtV (ORCPT ); Wed, 28 Sep 2022 03:49:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35670 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233740AbiI1HtE (ORCPT ); Wed, 28 Sep 2022 03:49:04 -0400 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 635AE13EEB8 for ; Wed, 28 Sep 2022 00:45:46 -0700 (PDT) Received: by mail-io1-f70.google.com with SMTP id a15-20020a6b660f000000b006a0d0794ad1so7206998ioc.6 for ; Wed, 28 Sep 2022 00:45:46 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date; bh=9XycJCXCOZILN8/LxOH1n0Rwv2oa94xAGmUtD5INdg4=; b=TCL8GgIWbZL707369feevChh37EJDXbXe57pkI7DYcBuon39yMAzetZlaOF2HlR3// obsutPuYRn2i4TfgqUtpE+1nAqDmqsq4tk+CSGXkD7QRWTbPsw+/9PAR90QmCWrpS+wI S0EU2GRlZTqFaTGkQLCnHFGKmKmsyL8MaN1vn9AhQs6QaXECMrv6pY7WuQSuFCSl7PQt S8oggzk/cVu1m34nZlTjahJjoBlmxXHuagtL1W7acvM/yw1IWVFTKO3HsWQgeXTJ6Ri2 hVVJAO0Mk6gbUEbDkG5oWq1HEjpuGJAQhLZ24RPnc80zZ/BEwDCEKPYKRMeMlBFm7yAw Ti9g== X-Gm-Message-State: ACrzQf1eFZyVzUpKeBN93nYF4yk9EAOXMWIyZULqjSacc9YCsyaaIK7A +wN5lUb04NWUXEMV24d8r6U1OXBhsWA+0WRprL8cetqK7CE4 X-Google-Smtp-Source: AMsMyM4+Hv8XfRgc3zhWDDPsJxH8ZzeRYrktZwjUP0Shtynt8fj6RnIIja+syYy15NpbhNMYqtSCF/ou9dKsiNp/TrioFcXbqM9L MIME-Version: 1.0 X-Received: by 2002:a92:c24e:0:b0:2f8:13b3:9f3 with SMTP id k14-20020a92c24e000000b002f813b309f3mr9792458ilo.189.1664351143245; Wed, 28 Sep 2022 00:45:43 -0700 (PDT) Date: Wed, 28 Sep 2022 00:45:43 -0700 In-Reply-To: <00000000000014512a05e9047a38@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000acbcd605e9b7f261@google.com> Subject: Re: [syzbot] WARNING: suspicious RCU usage in evict From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: 46452d3786a8 Merge tag 'sound-6.0-rc8' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15305c35080000 kernel config: https://syzkaller.appspot.com/x/.config?x=755695d26ad09807 dashboard link: https://syzkaller.appspot.com/bug?extid=45df7ccc8b5bade4f745 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=147e7ddf080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15a10538880000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+45df7ccc8b5bade4f745@syzkaller.appspotmail.com loop0: detected capacity change from 0 to 4096 ntfs3: loop0: Different NTFS' sector size (1024) and media sector size (512) ============================= WARNING: suspicious RCU usage 6.0.0-rc7-syzkaller-00042-g46452d3786a8 #0 Not tainted ----------------------------- include/trace/events/lock.h:69 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by syz-executor344/5141: #0: ffff88807aef40e0 (&type->s_umount_key#41/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228 #1: ffff88807aef49d8 (&s->s_inode_list_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline] #1: ffff88807aef49d8 (&s->s_inode_list_lock){+.+.}-{2:2}, at: inode_sb_list_del fs/inode.c:503 [inline] #1: ffff88807aef49d8 (&s->s_inode_list_lock){+.+.}-{2:2}, at: evict+0x179/0x6b0 fs/inode.c:654 stack backtrace: CPU: 1 PID: 5141 Comm: syz-executor344 Not tainted 6.0.0-rc7-syzkaller-00042-g46452d3786a8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 trace_lock_release include/trace/events/lock.h:69 [inline] lock_release.cold+0x1f/0x4e kernel/locking/lockdep.c:5677 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline] _raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:389 [inline] inode_sb_list_del fs/inode.c:505 [inline] evict+0x2aa/0x6b0 fs/inode.c:654 iput_final fs/inode.c:1748 [inline] iput.part.0+0x55d/0x810 fs/inode.c:1774 iput+0x58/0x70 fs/inode.c:1764 ntfs_fill_super+0x2e89/0x37f0 fs/ntfs3/super.c:1190 get_tree_bdev+0x440/0x760 fs/super.c:1323 vfs_get_tree+0x89/0x2f0 fs/super.c:1530 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1326/0x1e20 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f7d2f811a8a Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffca7746c38 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f7d2f811a8a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffca7746c50 RBP: 00007ffca7746c50 R08: 00007ffca7746c90 R09: 00007ffca7746c90 R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004 R13: 00007ffca7746c90 R14: 000000000000010e R15: 0000000020001b50 ntfs3: loop0: Mark volume as dirty due to NTFS errors