From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f77.google.com (mail-oo1-f77.google.com [209.85.161.77]) (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 D85C337AA79 for ; Mon, 8 Jun 2026 12:36:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780922196; cv=none; b=UGRZe6g33s610pWC797zRJjGhe+AuUPSqAWRc+kueAUap+Kb6VHZNkoBxlkten1UR+MP9pTN4cKBl67Xr9czaBPUo4jku/bvL/5KyaZz2/ypI1FpOpR0mwoB1el2u31b3drxHcrbOpHXrlU2tqF734Kd6p5X+gvazIy+JLzRdYc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780922196; c=relaxed/simple; bh=w9N7rUN5MyX0SWHUVLR7eOIV31mFCPUdmgCSaGSrv1A=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=IrsXp74mUfyK+1yM3oir3oCwOZrMlBoib6O2LekMjM9VpDkh9S/rkOCLMEXb844KFe5J/x2nmBH+/FCVivPjuuy73BurGV21k4X4BeNvELjP2DcKL5npGfsssMEIcWVcoQDF3E3uDFKKivmFK6JrLT8hah+Dt4uNVAs23hnAs2o= 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=209.85.161.77 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-oo1-f77.google.com with SMTP id 006d021491bc7-69de11bef3dso6121212eaf.0 for ; Mon, 08 Jun 2026 05:36:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780922194; x=1781526994; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=oIREoixd2bdV8Z7DckKM4nIm0jrKXnD6MTejIoiF5rM=; b=mWKDrGX1VGo9TxuyJpFcGhqGesXbZ/UMTE/5596a2yduOjQHkVsLYsl3knmyY5rZ7N yGuCjcrC1HvbtT3dNNWB0LHX1Ea/t4NGJgDIGsxk648utzobnDRLsMDHAXxQshZVkT5w dHFoB9WN9eVqGelyxfAMFvsfjpsMF32odPbfg5JwJ1RFEHYnIh40dCqwEtw9uU/JXl3D ILigbS5TGGjcI4x88MC+LGT5XwvVXFf7aAmeVkZItbWeD2WYieASDgV+5jrTfifFPFe4 u7sP0zY7vpAVNPRXzEEG6GB7fozk/aoujDWxTrK5ADI/TyAFWu+7+AsOWTuMezbieuCp W1sw== X-Forwarded-Encrypted: i=1; AFNElJ/ubft1X83WxnEbqgAkCdZNe6PPNlBn5ZwKZ1PjGRG8UZML97a98B+WsVz2HMYPbOqE+P34C1o=@vger.kernel.org X-Gm-Message-State: AOJu0YyNlxsGEYaxib7D8jxwMLQpqn1dFe2VmDBO0EeQGIsbOW9BLfVH JvPIymHESgACpkjtes7JYmKxVGUVKUZfFBVeWfCr8phsW0ivO0S6D74x3rvB4XlpVsI8hxxBGeu I3eWVfzXRu5oOA7Zsq0L3MkHo0OhC/naHnHa+6ZwNlUxYbg9Ke4yae2pVaqE= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:6fc8:b0:699:a28b:18ed with SMTP id 006d021491bc7-69e68c6459cmr6137714eaf.48.1780922193959; Mon, 08 Jun 2026 05:36:33 -0700 (PDT) Date: Mon, 08 Jun 2026 05:36:33 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a26b751.c25708ab.1b19ef.0013.GAE@google.com> Subject: [syzbot] [net?] BUG: corrupted list in dev_deactivate_many (2) From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 511e746700ee usb: host: xhci-rcar: Split R-Car Gen2 and Ge.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=14231e7a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=30c90421ef9661c9 dashboard link: https://syzkaller.appspot.com/bug?extid=381d82bbf0253710b35d compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1533db7e580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6557c06dfbf9/disk-511e7467.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2753a4bffe07/vmlinux-511e7467.xz kernel image: https://storage.googleapis.com/syzbot-assets/6954fb52fe02/bzImage-511e7467.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+381d82bbf0253710b35d@syzkaller.appspotmail.com list_del corruption, ffff888114a18c00->next is NULL ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:52! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 91 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: events_unbound linkwatch_event RIP: 0010:__list_del_entry_valid_or_report.cold+0x22/0x2a lib/list_debug.c:52 Code: e8 9d d8 fa ff 90 0f 0b 48 89 de 48 c7 c7 80 85 b0 87 e8 8b d8 fa ff 90 0f 0b 48 89 de 48 c7 c7 20 85 b0 87 e8 79 d8 fa ff 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000517870 EFLAGS: 00010086 RAX: 0000000000000033 RBX: ffff888114a18c00 RCX: 0000000000000000 RDX: 0000000000000033 RSI: ffffffff819207d9 RDI: fffff520000a2eff RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000202 R11: fffffffffffeb4a0 R12: 0000000000000000 R13: ffffc900005178c0 R14: ffff888135550678 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8882687a5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007febffbd4e9c CR3: 0000000120bc2000 CR4: 00000000003506f0 Call Trace: __list_del_entry_valid include/linux/list.h:132 [inline] __list_del_entry include/linux/list.h:246 [inline] list_move_tail include/linux/list.h:341 [inline] ref_tracker_free+0x1a7/0x6c0 lib/ref_tracker.c:329 netdev_tracker_free include/linux/netdevice.h:4491 [inline] netdev_put include/linux/netdevice.h:4508 [inline] netdev_put include/linux/netdevice.h:4504 [inline] netdev_watchdog_down net/sched/sch_generic.c:600 [inline] dev_deactivate_many+0x28c/0xfe0 net/sched/sch_generic.c:1363 dev_deactivate+0x109/0x1d0 net/sched/sch_generic.c:1397 linkwatch_do_dev net/core/link_watch.c:184 [inline] linkwatch_do_dev+0xd3/0x120 net/core/link_watch.c:166 __linkwatch_run_queue+0x3a5/0x810 net/core/link_watch.c:240 linkwatch_event+0x8f/0xc0 net/core/link_watch.c:314 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314 process_scheduled_works kernel/workqueue.c:3397 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report.cold+0x22/0x2a lib/list_debug.c:52 Code: e8 9d d8 fa ff 90 0f 0b 48 89 de 48 c7 c7 80 85 b0 87 e8 8b d8 fa ff 90 0f 0b 48 89 de 48 c7 c7 20 85 b0 87 e8 79 d8 fa ff 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000517870 EFLAGS: 00010086 RAX: 0000000000000033 RBX: ffff888114a18c00 RCX: 0000000000000000 RDX: 0000000000000033 RSI: ffffffff819207d9 RDI: fffff520000a2eff RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000202 R11: fffffffffffeb4a0 R12: 0000000000000000 R13: ffffc900005178c0 R14: ffff888135550678 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8882687a5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007febffbd4e9c CR3: 0000000120bc2000 CR4: 00000000003506f0 --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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