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 X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A884EC2D0C0 for ; Mon, 16 Dec 2019 13:15:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7E8712072B for ; Mon, 16 Dec 2019 13:15:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727902AbfLPNPM (ORCPT ); Mon, 16 Dec 2019 08:15:12 -0500 Received: from mail-io1-f69.google.com ([209.85.166.69]:54965 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727897AbfLPNPL (ORCPT ); Mon, 16 Dec 2019 08:15:11 -0500 Received: by mail-io1-f69.google.com with SMTP id a22so1234582iol.21 for ; Mon, 16 Dec 2019 05:15:09 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=+NiEDLJFsBmoAz9FxlNZu3VsRkAVn3LIvbE1kHOh8EA=; b=cY35sXDQKCYMQrM9LyKK6njc3vvQs3Op/VtfTpaGljESz3kfOWtq59Xg+q+ly6SSB2 6T4C6t6FUozgxaDv45TNuJglS/Ui7kETfUO+mmiiSjFQaqubw/2AIjBGPTLRd+1Gf499 otPH/mfljqbDYHdLMgdcU8edtSTHXf42uZJI8ubkXsrhoQgjk/drJZGyV4KlU/VNosyn M8qAoEddWEMnsc9TjVKF9k+bBvWC1a/gTomS7E8H++JdAQWcgyEp4AdRNIOgcI7SjoGv zmmEfKq+rEANFcvCbMRVnnlWJcJjisOjB7xIU0vHQYHICzB6YzMCHzkTOF/KKvZmHJrN WDOQ== X-Gm-Message-State: APjAAAVlGXDWVv3gSbLqpna5l2MIq2XQqVYBIOhrb0g+A1bwv4t/7gDA 3lcP3It8qRCtVLglEIZMtlw8sNMAR52WY+/ypuo+/djSiYCY X-Google-Smtp-Source: APXvYqyQbMJXjDrLM/1wf/Pwg/dxS3CBZV6XymobuPb/6el93ExhT76kQ0QU//Wd5+VcXPg/oY3wq7rT49mze/ZETcdsQlalAiwq MIME-Version: 1.0 X-Received: by 2002:a02:c611:: with SMTP id i17mr12011557jan.28.1576502109548; Mon, 16 Dec 2019 05:15:09 -0800 (PST) Date: Mon, 16 Dec 2019 05:15:09 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003a39d50599d200e6@google.com> Subject: WARNING in uvc_scan_chain_forward From: syzbot To: andreyknvl@google.com, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-usb@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 4cc037ec usb: gadget: add raw-gadget interface git tree: https://github.com/google/kasan.git usb-fuzzer console output: https://syzkaller.appspot.com/x/log.txt?x=11b905dee00000 kernel config: https://syzkaller.appspot.com/x/.config?x=e9c2b6de462bc469 dashboard link: https://syzkaller.appspot.com/bug?extid=0a5c96772a9b26f2a876 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10f82546e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1638ef7ee00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+0a5c96772a9b26f2a876@syzkaller.appspotmail.com usb 1-1: New USB device found, idVendor=0bd3, idProduct=0755, bcdDevice=69.6a usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? usb 1-1: string descriptor 0 read error: -71 uvcvideo: Found UVC 0.00 device (0bd3:0755) ------------[ cut here ]------------ list_add double add: new=ffff8881d0637010, prev=ffff8881d0637010, next=ffff8881d4e87c18. WARNING: CPU: 1 PID: 22 at lib/list_debug.c:29 __list_add_valid+0xb4/0xf0 lib/list_debug.c:29 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xef/0x16e lib/dump_stack.c:118 panic+0x2aa/0x6e1 kernel/panic.c:221 __warn.cold+0x2f/0x30 kernel/panic.c:582 report_bug+0x27b/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:267 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:__list_add_valid+0xb4/0xf0 lib/list_debug.c:29 Code: 48 c7 c7 e0 f3 da 85 4c 89 e6 e8 ef cf 2b ff 0f 0b 31 c0 eb c5 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 60 f4 da 85 e8 d4 cf 2b ff <0f> 0b 31 c0 eb aa 48 89 34 24 e8 fd 3c 7f ff 48 8b 34 24 e9 60 ff RSP: 0018:ffff8881d8c37080 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff8881d0637010 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81295dad RDI: ffffed103b186e02 RBP: ffff8881d0637010 R08: ffff8881da24e200 R09: fffffbfff11f1eae R10: fffffbfff11f1ead R11: ffffffff88f8f56f R12: ffff8881d4e87c18 R13: ffff8881d0637000 R14: dffffc0000000000 R15: ffff8881d4e87c18 __list_add include/linux/list.h:60 [inline] list_add_tail include/linux/list.h:93 [inline] uvc_scan_chain_forward.isra.0+0x4df/0x637 drivers/media/usb/uvc/uvc_driver.c:1526 uvc_scan_chain drivers/media/usb/uvc/uvc_driver.c:1640 [inline] uvc_scan_device drivers/media/usb/uvc/uvc_driver.c:1824 [inline] uvc_probe.cold+0x1aee/0x29de drivers/media/usb/uvc/uvc_driver.c:2197 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x104/0x210 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0x1480/0x1c20 drivers/base/core.c:2487 usb_set_configuration+0xe67/0x1740 drivers/usb/core/message.c:2023 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x104/0x210 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0x1480/0x1c20 drivers/base/core.c:2487 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2537 hub_port_connect drivers/usb/core/hub.c:5184 [inline] hub_port_connect_change drivers/usb/core/hub.c:5324 [inline] port_event drivers/usb/core/hub.c:5470 [inline] hub_event+0x1e59/0x3860 drivers/usb/core/hub.c:5552 process_one_work+0x92b/0x1530 kernel/workqueue.c:2264 worker_thread+0x96/0xe20 kernel/workqueue.c:2410 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches