From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f78.google.com (mail-io1-f78.google.com [209.85.166.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 20D2E2AD11 for ; Sat, 2 Aug 2025 03:33:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754105610; cv=none; b=CMLCrP6Yo76fC6xaP554erlCnNFosxr7acUgpwzEUw5XHy6NCxfpMlS7X0YyDdz4m80dgen73hDFgY77hQvsllRjopbjyOItYgAEVtLCBSTl6NMNt1kbmRh+sTAE0mzuvCm1Y7vSuFvwIkX9V2fvojZWv2J0RbBrxBvK0+U2S0c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754105610; c=relaxed/simple; bh=5Cq1exZhWFLjrp8oBDKR6trzjHvPpLCE/AAS8QfIBUg=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=H8sKG2do13GP+FMW0dAaStUd6+UypTpGCV2OxbOIo2m8jvQZWnRzCCdDdeOKuFRuezh/LKEZ4OweTtn+Lf6ym7GsTHrEtiVl9svoFZ9F6iF9wdGQDB4V7QIiRJOFEQEIG+XsFHqN787cLMIrAVmYRCfnsMlEv1iGF5SNN5P8UB0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.78 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f78.google.com with SMTP id ca18e2360f4ac-8760733a107so229804539f.3 for ; Fri, 01 Aug 2025 20:33:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754105608; x=1754710408; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=laegd8mbnk5HeXrbQDy+tFC7eBnbymZo13VgtL9j0PE=; b=MNI0ZP45IgTMlt0bp95LeuPIl9HbFn4itY78aR1qaYdutt1lghNp/sU363MYgr1fDn agH3r8vehWRSXRzSzG8eP9CFe1LAJGyWXikwEo2WMOYTm109x6eWpPdJZDvG0E9Xr7rO YS/MEQiexUAVrA13PzoE6gE+Vxa9Df02k3SICtPMGdOS3q/v5Cstk2dfx70nE8qTXmka hlFM2yLT4OqTwXbWnHxhIyhvkGO95AF8QNRVlVv9x6FrJgKkIy1NsNdq5rEoNtPpcUAF pfc4fV8RRB3ctp8OvxBgyUsn1Eo6l9jAX9hmXoT1Cw1hAUFvFFBTcngisXy0RNhmBYt3 NnbQ== X-Forwarded-Encrypted: i=1; AJvYcCUduigqipPimNZSvsUsXO9U2SdY/wo11EOtBcV1SrZ1PBuMOY6rmLMhWnw7aJxswrgJ18BFmlGpA/UW0w==@vger.kernel.org X-Gm-Message-State: AOJu0YxsFbK4K5WNo5xcJq9sbhzYIibPSK1kQQlRP9GIX+kn0NLGHvNf 45ZBns0+ABbDaEXQ38mfzSp8SPhf06eghTkJNNo7U8zXXcCZfC6UFDu3ReCVlfKkQA1Zp3bgT2z j19itdijNVT3BWacp7FtHwOb0LeXdeTeptUEtxcBo31IX8J9CT7X1PNgjW1g= X-Google-Smtp-Source: AGHT+IGTWEHqJnWLhSs5jk10Y04IZkkIsyVJt1jogy6UoXblzZ+sfoCsOAYRbhrqvpGCj1bBjLDhbJnZ8JD27EAtuv9+c45Jos20 Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3f0d:b0:3e3:fdd9:8972 with SMTP id e9e14a558f8ab-3e41615d9c0mr38318945ab.11.1754105608292; Fri, 01 Aug 2025 20:33:28 -0700 (PDT) Date: Fri, 01 Aug 2025 20:33:28 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <688d8708.050a0220.f0410.0135.GAE@google.com> Subject: [syzbot] [block?] WARNING: ODEBUG bug in disk_release From: syzbot To: axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 89748acdf226 Merge tag 'drm-next-2025-08-01' of https://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=151c12a2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ff858d5d4508232d dashboard link: https://syzkaller.appspot.com/bug?extid=1fe2f3ddc7f8f83fb196 compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4f34b67c9cfc/disk-89748acd.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2f11bb9a095b/vmlinux-89748acd.xz kernel image: https://storage.googleapis.com/syzbot-assets/3e15dbd303fb/bzImage-89748acd.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1fe2f3ddc7f8f83fb196@syzkaller.appspotmail.com md: md2 stopped. ------------[ cut here ]------------ ODEBUG: free active (active state 0) object: ffff88801f3b4448 object type: work_struct hint: mddev_delayed_delete+0x0/0x20 drivers/md/md.c:721 WARNING: CPU: 0 PID: 11789 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612 Modules linked in: CPU: 0 UID: 0 PID: 11789 Comm: syz.5.1495 Not tainted 6.16.0-syzkaller-10499-g89748acdf226 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612 Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 41 56 48 8b 14 dd e0 0a 16 8c 4c 89 e6 48 c7 c7 60 ff 15 8c e8 bf 92 90 fc 90 <0f> 0b 90 90 58 83 05 b6 a5 bf 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d RSP: 0018:ffffc90004a6f928 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffc9001b884000 RDX: 0000000000080000 RSI: ffffffff817a2815 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8c160600 R13: ffffffff8bac16a0 R14: ffffffff8856a0a0 R15: ffffc90004a6fa28 FS: 00007f777160f6c0(0000) GS:ffff8881246fb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000011a000 CR3: 000000005441a000 CR4: 00000000003526f0 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline] debug_check_no_obj_freed+0x4b7/0x600 lib/debugobjects.c:1129 slab_free_hook mm/slub.c:2348 [inline] slab_free mm/slub.c:4680 [inline] kfree+0x28f/0x4d0 mm/slub.c:4879 disk_release+0x2a1/0x410 block/genhd.c:1310 device_release+0xa4/0x240 drivers/base/core.c:2565 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1e7/0x5a0 lib/kobject.c:737 put_device+0x1f/0x30 drivers/base/core.c:3797 blkdev_release+0x15/0x20 block/fops.c:699 __fput+0x3ff/0xb70 fs/file_table.c:468 task_work_run+0x14d/0x240 kernel/task_work.c:227 get_signal+0x1d1/0x26d0 kernel/signal.c:2807 arch_do_signal_or_restart+0x8f/0x7d0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:224 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f777078eb69 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f777160f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007f77709b6160 RCX: 00007f777078eb69 RDX: 0000000000000007 RSI: 0000000000000932 RDI: 0000000000000007 RBP: 00007f7770811df1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f77709b6160 R15: 00007ffcb194e248 --- 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. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup