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 4AFF62C08C0 for ; Thu, 27 Nov 2025 07:44:28 +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=1764229470; cv=none; b=ImJzUwuRZ+BtodNnCcMxAugFqC20Z682UIqHaVVj0bOXRc+4I70FjJsjkHmR39SWD8PxZXZ5Z/oT4hDkfVJnwxq0egVVRrpth+evBS9eUX05/0VuvVwLRotjxYa83/GaebK2LnqYlFSMCtERHhzczwxcHlL90KRwtg16fZ7eERQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764229470; c=relaxed/simple; bh=fsMszkeGTcVYN3sFDJPPTtTMk4ajKNVBnjLW4AB0Ie4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=tl/AANq2FKCI9Mng9rgN2DIl8dyZaqCkwFpc1l4tVBuK1cASGHzUcjdX6NKgvESe9g3xI1XXAy8F9fqi8e+Ayq5TgQ0WmnC0tHxKkJIGCMFxPQSehOe+1loLsUttGtzluugQBMrwmWKF0ncOIRGn05c5feD6XfZupjAS0NeZerU= 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-948bf83a707so35336239f.1 for ; Wed, 26 Nov 2025 23:44:28 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764229468; x=1764834268; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=jrPDslZXE/+C296ALo4Sd1air3PJyRjJahHyvz0O+Ww=; b=QcyLqhceRnM6f3CUMqs1HvgE4n/o/GSkG73smKAbujzosTpuwGBo4XxsYicpjAeH0K dwDJrmEfrfNM5wpISXYwCLdVJ0dmeeF0hugShMDvSwVTRacVdF7FLfjfU8DE1DibuFUK R5TOJd6HTWOEJYnV2zVdcsBVI1OOc9efb3wm3r4uVTK+01uifHaF6gSWkwykyhwUV2gW rpt4DgpqH5D5EWoo5eEDPAiKLHwzi4x+ZS0X0pk52F2tSAoV/TaWdYJ8egAI6PwkWKTt yZm3VquQ+O9jI7mg6tpoMtSwmhS8XQmhu0q9pUTKHtExN0CvvZqlzd3lZl3HyN8y5gLd znWA== X-Forwarded-Encrypted: i=1; AJvYcCXSPplFW8weHow9TpX/o3znmGMCJZrXwU1JKxbPZ3cXozEyOInxtrh4Gpzt5tUC3zo3NJjM/Q2ufGFPT4U=@vger.kernel.org X-Gm-Message-State: AOJu0YzB+uObS7lJC3VENOmAh7CJgb0XYMiPUh7LOMssajgYihGCIfDx VD7Kamm/RkZlAlLVMpRDlb/Z4gyXvbEfrdz23c1dqSzy4o5Xj5+y+ZzwC2WZk+jJbBx4FaxL39T cl+dZwiXU1CiRYqHlIPfu2Zl8zMh4yU/3EsrO9n52/T7Amn2uqog1yE+20MI= X-Google-Smtp-Source: AGHT+IH8+IWl0g+9x3PurPJEqckR3tAsZekqZehr98fUW6xeZvww32cq3wKsdH6wmXa5ycgN/ojnjRcQpH+9S98fieR1Vbm7oy8x Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:48c7:b0:572:4e49:7216 with SMTP id 8926c6da1cb9f-5b967a8ab47mr14665952173.19.1764229468286; Wed, 26 Nov 2025 23:44:28 -0800 (PST) Date: Wed, 26 Nov 2025 23:44:28 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6928015c.a70a0220.d98e3.00f3.GAE@google.com> Subject: [syzbot] [i2c?] WARNING: ODEBUG bug in i2c_device_remove From: syzbot To: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, wsa+renesas@sang-engineering.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: fd95357fd8c6 Merge tag 'sched_ext-for-6.18-rc6-fixes-2' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=174c5742580000 kernel config: https://syzkaller.appspot.com/x/.config?x=38a0c4cddc846161 dashboard link: https://syzkaller.appspot.com/bug?extid=7e6ce34763ef58212c4a compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c3725d56dc16/disk-fd95357f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5ae11d958530/vmlinux-fd95357f.xz kernel image: https://storage.googleapis.com/syzbot-assets/b484995bf333/bzImage-fd95357f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7e6ce34763ef58212c4a@syzkaller.appspotmail.com ------------[ cut here ]------------ ODEBUG: free active (active state 0) object: ffff88805d740690 object type: work_struct hint: rtl2832_i2c_gate_work+0x0/0xd0 drivers/media/dvb-frontends/rtl2832.c:-1 WARNING: CPU: 1 PID: 1232 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612 Modules linked in: CPU: 1 UID: 0 PID: 1232 Comm: kworker/1:2 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: usb_hub_wq hub_event RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612 Code: 4c 89 ff e8 07 ad 9d fd 4d 8b 0f 48 c7 c7 80 e9 3d 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 2a 35 00 fd 48 83 c4 08 90 <0f> 0b 90 90 ff 05 27 93 53 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 RSP: 0018:ffffc90004eae760 EFLAGS: 00010296 RAX: 9a1ddaa657264c00 RBX: dffffc0000000000 RCX: 0000000000100000 RDX: ffffc9001b1c7000 RSI: 000000000002da78 RDI: 000000000002da79 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed101712487b R12: ffffffff8709b290 R13: ffffffff8b3deb00 R14: ffff88805d740690 R15: ffffffff8ae9e880 FS: 0000000000000000(0000) GS:ffff888126ef6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000001f4030 CR3: 000000003179c000 CR4: 00000000003526f0 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline] debug_check_no_obj_freed+0x3a2/0x470 lib/debugobjects.c:1129 slab_free_hook mm/slub.c:2474 [inline] slab_free mm/slub.c:6642 [inline] kfree+0x114/0x950 mm/slub.c:6849 i2c_device_remove+0x88/0x200 drivers/i2c/i2c-core-base.c:631 device_remove drivers/base/dd.c:569 [inline] __device_release_driver drivers/base/dd.c:1274 [inline] device_release_driver_internal+0x46f/0x800 drivers/base/dd.c:1297 bus_remove_device+0x355/0x420 drivers/base/bus.c:579 device_del+0x515/0x8e0 drivers/base/core.c:3878 device_unregister+0x20/0xc0 drivers/base/core.c:3919 rtl28xxu_frontend_detach+0x167/0x1e0 drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1105 dvb_usbv2_adapter_frontend_exit drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:732 [inline] dvb_usbv2_adapter_exit drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:829 [inline] dvb_usbv2_exit+0x435/0x9e0 drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:843 dvb_usbv2_probe+0x4c4/0x41c0 drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:993 usb_probe_interface+0x668/0xc30 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x254/0x2e0 drivers/base/bus.c:462 __device_attach+0x2bb/0x400 drivers/base/dd.c:1031 bus_probe_device+0x188/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c4/0x390 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x254/0x2e0 drivers/base/bus.c:462 __device_attach+0x2bb/0x400 drivers/base/dd.c:1031 bus_probe_device+0x188/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 usb_new_device+0xa29/0x16e0 drivers/usb/core/hub.c:2694 hub_port_connect drivers/usb/core/hub.c:5566 [inline] hub_port_connect_change drivers/usb/core/hub.c:5706 [inline] port_event drivers/usb/core/hub.c:5870 [inline] hub_event+0x2958/0x4a20 drivers/usb/core/hub.c:5952 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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