From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (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 A2A0334BA3A for ; Tue, 7 Oct 2025 03:33:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759808010; cv=none; b=UAd+nqYx/vluP179inh5EmqIY0LwBw8q2dSYt4rTMvORDv4MQ06fKMJNwMve9xHUNFIxP9gB4ODs9v7LFfwXtJrBeC/r5snXjEeDSc5mBk/MgjSyIX1TNkR6emhSwQlvmYp1/346Cwu0SJp5oIkhmKaT0Em5pVvZ0U5im/jnVlw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759808010; c=relaxed/simple; bh=Qo152Ck+YxuMOkvgcNAkaVmRHYF98a6hzVfseUr0S40=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=UeDsGgqPJor/Z8qMIq2gJAzbNxlkW8d7AQRjUCsFpn/tnOCIRoLN1l9vnnBTOy+ugxajIkGDlKlwke8peccpz0X0XGT2rWUcEmZ9xuAaADpOQgldhn3iXLPl8nygVZzmKEGYgm8evMZTQBNW2nJC0TNz+zB4xg538udsNWkd3q4= 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=209.85.166.205 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-il1-f205.google.com with SMTP id e9e14a558f8ab-42f7adbd951so5685425ab.0 for ; Mon, 06 Oct 2025 20:33:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1759808007; x=1760412807; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=952owU/EqtMgqLf+gZ7Jn7cvNDb68sFa+jvCW3cWFcw=; b=bUC8fnvF9xSQCtb74JNAMWA5c7Qe+SC+q9A+nExOYkUtLkMfHXpc/pzpEF9H5y4Rcg giQimfizFZWIGvlXl7Bm9Xdu7KvjLDn25hAwPP1I7xDcgABizWVrr2fhQdXZVY5MNUne rq9nA9kmcFj5eISjL/VNUw/5XM77HDnBCZcEbxA2iK9qY9xa5NckpxJMVa5oVWTEHhcn oCavwnOKIkrBNcj0Ja228et6N5Kn2vSuUw/+82+F/xI2GSx76asbqc9yWTG3F02ba8jx H/0raB2FuCVEplBpqS2e9DVjwYHVVTNWRsogLp/zB2GtNJw2ArMjOg0hNMbMeOFXHhJq Mqgw== X-Forwarded-Encrypted: i=1; AJvYcCWKh1rb+DBpxj+RMWacfoLVOsPCSsaAB8BIPxtyH5Ai9o604Ultm54Dqet8YUdvPe0iUbSo840kJb9LTB0=@vger.kernel.org X-Gm-Message-State: AOJu0YypIMl4bIuYMZEJewRpLysvKHL7wIkXM+uXBXrXeLAfRvvpL58o 8k25eA2QkD7Yez82rVljaMC+khuRxHf6KUX42nyhxYFHSi+Ir3RpK018FJT/SPWs3sPcKMhqzSQ CFKxxJ27vajbKxZC9Aov2/QUyY7sakCt2uHZ70xSNgJo3GCFSI3+McSZ1HeU= X-Google-Smtp-Source: AGHT+IHQ10nqe4mSpqPwa3nNHorUsWgHZKJ2FqxJQeZOaMmqnrsm53K08Tu0e1xbDfvom7tMXDbULT8NHg7BXiVrLem8dRi8ZQ8j Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:156f:b0:423:feda:f14f with SMTP id e9e14a558f8ab-42e7ad018aemr243117805ab.12.1759808007446; Mon, 06 Oct 2025 20:33:27 -0700 (PDT) Date: Mon, 06 Oct 2025 20:33:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68e48a07.050a0220.256323.0014.GAE@google.com> Subject: [syzbot] [usb?] KASAN: vmalloc-out-of-bounds Read in kcov_remote_stop From: syzbot To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: fd94619c4336 Merge tag 'zonefs-6.18-rc1' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15c381e2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e2b03b8b7809165e dashboard link: https://syzkaller.appspot.com/bug?extid=90984d3713722683112e 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/201636e25a0b/disk-fd94619c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b63e3832240c/vmlinux-fd94619c.xz kernel image: https://storage.googleapis.com/syzbot-assets/11fc378734e8/bzImage-fd94619c.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+90984d3713722683112e@syzkaller.appspotmail.com usb 5-1: config 0 descriptor?? appletouch 5-1:0.85: Failed to read mode from device. appletouch 5-1:0.85: probe with driver appletouch failed with error -5 usb 5-1: USB disconnect, device number 31 ================================================================== BUG: KASAN: vmalloc-out-of-bounds in __list_add_valid_or_report+0x4e/0x130 lib/list_debug.c:29 Read of size 8 at addr ffffc9000ffa1008 by task kworker/1:1/44 CPU: 1 UID: 0 PID: 44 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Workqueue: usb_hub_wq hub_event Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 __list_add_valid_or_report+0x4e/0x130 lib/list_debug.c:29 __list_add_valid include/linux/list.h:96 [inline] __list_add include/linux/list.h:158 [inline] list_add include/linux/list.h:177 [inline] kcov_remote_area_put kernel/kcov.c:156 [inline] kcov_remote_stop+0x52d/0x660 kernel/kcov.c:1060 hub_event+0x45d2/0x4a20 drivers/usb/core/hub.c:5997 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+0x439/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to a vmalloc virtual mapping Memory state around the buggy address: ffffc9000ffa0f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9000ffa0f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 >ffffc9000ffa1000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc9000ffa1080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9000ffa1100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ================================================================== --- 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