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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 181BCC433F5 for ; Fri, 18 Mar 2022 16:39:33 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KKqVC4BPFz30hl for ; Sat, 19 Mar 2022 03:39:31 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com (client-ip=209.85.166.198; helo=mail-il1-f198.google.com; envelope-from=3ulu0ygkbaa87dezp00t6p44xs.v33v0t97t6r328t28.r31@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com; receiver=) Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4KKqV35gHyz30Kq for ; Sat, 19 Mar 2022 03:39:23 +1100 (AEDT) Received: by mail-il1-f198.google.com with SMTP id v11-20020a92c80b000000b002c7e3b707caso3140894iln.15 for ; Fri, 18 Mar 2022 09:39:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=A0PKiBGd+xqMYlJRDbW4r7jmAFaIon/xTP2ACrQ8MXA=; b=eWoksPRioXEdD0kN6pzwNpPVYlC77TS4exoiCHsshri2y5VD0VPDs5+6ODwRXobKOX RMRPmjXCBjbQpIp/GAyoEmSd/ANXhndDYliCXkn4JtXSrn7X8U/pNDV98B0KBpOlSQb9 AZO97Y3s/mWDabo5+NVjiJoDJnPHXxMu1ENtNiswn7wBsctdrDeu0CxCCVluETxted9Y Jws8vCSh26rDwo3o//+KgcX6sFW6w7JAUWGfxZckoJ0I9vMBZZ6Wuzv7qq5t779rMOoG v6/FmkGQulwBjzvvIDWQFZsEkMj+YhkZQPE7cj86mXhVNbZJ+//ygqdzKoPoU3ZVW+7V 0h8w== X-Gm-Message-State: AOAM530Bo9rAFYQKbSE7y2MFz5NXCSlo4FJt4uqf//j0mSyzXV555myz HaG9ySbSrAe4jZYyoyhy9ddvbSAud5SrdXMucPWTqHUp9L6W X-Google-Smtp-Source: ABdhPJyC6gYZ9Y93i4A4FhPNXoiQvz3JsiCnqMFuUY15iFLSwcseFr3ELOyXfIHXROwGznyLd54okj4K0QY8i1dbJhqJLVpL9sAV MIME-Version: 1.0 X-Received: by 2002:a05:6e02:12ec:b0:2c7:e74b:14ba with SMTP id l12-20020a056e0212ec00b002c7e74b14bamr3635593iln.215.1647621560965; Fri, 18 Mar 2022 09:39:20 -0700 (PDT) Date: Fri, 18 Mar 2022 09:39:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000dda2f905da80c934@google.com> Subject: [syzbot] WARNING: kobject bug in erofs_unregister_sysfs From: syzbot To: chao@kernel.org, linux-erofs@lists.ozlabs.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, xiang@kernel.org Content-Type: text/plain; charset="UTF-8" X-BeenThere: linux-erofs@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development of Linux EROFS file system List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-erofs-bounces+linux-erofs=archiver.kernel.org@lists.ozlabs.org Sender: "Linux-erofs" Hello, syzbot found the following issue on: HEAD commit: 91265a6da44d Add linux-next specific files for 20220303 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11007413700000 kernel config: https://syzkaller.appspot.com/x/.config?x=617f79440a35673a dashboard link: https://syzkaller.appspot.com/bug?extid=f05ba4652c0471416eaf 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=137f17d9700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=114ebabd700000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f05ba4652c0471416eaf@syzkaller.appspotmail.com RBP: 00007fff8eeb06e0 R08: 00007fff8eeb0720 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200000b0 R13: 0000000000000004 R14: 0000000000000005 R15: 0000000000000002 ------------[ cut here ]------------ kobject: '(null)' (ffff888077324190): is not initialized, yet kobject_put() is being called. WARNING: CPU: 0 PID: 3610 at lib/kobject.c:750 kobject_put+0x22b/0x540 lib/kobject.c:750 Modules linked in: CPU: 0 PID: 3610 Comm: syz-executor471 Not tainted 5.17.0-rc6-next-20220303-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kobject_put+0x22b/0x540 lib/kobject.c:750 Code: e8 6a 83 67 fd 48 89 e8 48 c1 e8 03 42 80 3c 20 00 0f 85 94 02 00 00 48 8b 75 00 48 89 ea 48 c7 c7 c0 0d 2a 8a e8 c1 5b 07 05 <0f> 0b e9 32 fe ff ff e8 39 83 67 fd 4d 89 f9 48 89 e9 4c 89 f2 49 RSP: 0018:ffffc90003b9fc48 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88801c67ba80 RSI: ffffffff81602878 RDI: fffff52000773f7b RBP: ffff888077324190 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815fd23e R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880773241cc R14: ffff888073799cf8 R15: ffff8880207dc068 FS: 0000555556165300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff8eeb1000 CR3: 000000001ac3f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: erofs_unregister_sysfs+0x46/0x60 fs/erofs/sysfs.c:225 erofs_put_super+0x37/0xb0 fs/erofs/super.c:771 generic_shutdown_super+0x14c/0x400 fs/super.c:462 kill_block_super+0x97/0xf0 fs/super.c:1394 erofs_kill_sb+0x60/0x190 fs/erofs/super.c:752 deactivate_locked_super+0x94/0x160 fs/super.c:332 get_tree_bdev+0x573/0x760 fs/super.c:1294 vfs_get_tree+0x89/0x2f0 fs/super.c:1497 do_new_mount fs/namespace.c:3025 [inline] path_mount+0x1320/0x1fa0 fs/namespace.c:3355 do_mount fs/namespace.c:3368 [inline] __do_sys_mount fs/namespace.c:3576 [inline] __se_sys_mount fs/namespace.c:3553 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3553 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+0x44/0xae RIP: 0033:0x7fa80fa1344a 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:00007fff8eeb06c8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fff8eeb0720 RCX: 00007fa80fa1344a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff8eeb06e0 RBP: 00007fff8eeb06e0 R08: 00007fff8eeb0720 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200000b0 R13: 0000000000000004 R14: 0000000000000005 R15: 0000000000000002 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches