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,URIBL_BLOCKED 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 46CCAC73C46 for ; Tue, 9 Jul 2019 12:27:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2993F216E3 for ; Tue, 9 Jul 2019 12:27:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726817AbfGIM1J (ORCPT ); Tue, 9 Jul 2019 08:27:09 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:55100 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726154AbfGIM1I (ORCPT ); Tue, 9 Jul 2019 08:27:08 -0400 Received: by mail-io1-f71.google.com with SMTP id n8so22824303ioo.21 for ; Tue, 09 Jul 2019 05:27:07 -0700 (PDT) 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=hGo8EbEA3ZKfqUVxyvabXM+z4gyY4A3JpCgTFSwOIxY=; b=NjJjiGZlWXgcNUmDOhLUEZBWSsWkPxo/M3nwKnDkBbluGSc5/Kj1WTCyfF4WwK6zjJ dMiC0szWPKAF+67QClr+c6HXCJy0BKN4x8R3cskIXstOqNXS1xBwm5b55cNeuihlgWEw TaiitxTYabpgoA2qpxraAwa2g5OqmOJOMBb7RmqbxwqHGfADwHiINaXhDswNYxd/JYV6 9uBc5z19KWA2sBeStmGe0hJ+2ernq7+MqTw367Q8OLs06UtzQf0m7ARsj+wccvhQu6uH yGSZdSF0t/5/Z9Ac5qdc2RL2Ti52huiu6Ew+SzQSydfr2FmoWjAK2RhSFvlbyDtvgcb/ 2+Lg== X-Gm-Message-State: APjAAAW518U8Lsrxm6ZLi0VFmMwinZNsHrt9FHSjRWsu9R1auAxuOeq+ feENol9/gydRQeOfa5ICuTCpj8xyrKuIRXFfDBTdX046fx8u X-Google-Smtp-Source: APXvYqxfFL7rbB9NNuNdYve/wnQ+LnO/p1FfoKru10JjwRiTTBhM1RedITaDY+N8Dre9ohQuLEBEKe+9QOz+lFWoQJQqCKLl4a+D MIME-Version: 1.0 X-Received: by 2002:a02:2245:: with SMTP id o66mr28683555jao.53.1562675227511; Tue, 09 Jul 2019 05:27:07 -0700 (PDT) Date: Tue, 09 Jul 2019 05:27:07 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d5d567058d3eadcf@google.com> Subject: general protection fault in vmk80xx_write_packet From: syzbot To: abbotti@mev.co.uk, andreyknvl@google.com, devel@driverdev.osuosl.org, gregkh@linuxfoundation.org, hsweeten@visionengravers.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 7829a896 usb-fuzzer: main usb gadget fuzzer driver git tree: https://github.com/google/kasan.git usb-fuzzer console output: https://syzkaller.appspot.com/x/log.txt?x=126dd493a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=f6d4561982f71f63 dashboard link: https://syzkaller.appspot.com/bug?extid=009f546aa1370056b1c2 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1684570ba00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=132c91f5a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+009f546aa1370056b1c2@syzkaller.appspotmail.com usb 1-1: config 0 interface 160 has no altsetting 0 usb 1-1: New USB device found, idVendor=10cf, idProduct=5501, bcdDevice=eb.5b usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 1 PID: 21 Comm: kworker/1:1 Not tainted 5.2.0-rc6+ #13 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:vmk80xx_write_packet+0x75/0x260 drivers/staging/comedi/drivers/vmk80xx.c:204 Code: 48 8d 7b 68 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d3 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 6b 68 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 84 01 00 00 RSP: 0018:ffff8881d9eff1b0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8881d4f596c0 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff847cda93 RDI: ffff8881d4f59728 RBP: ffff8881cfc79900 R08: ffff8881d9e36000 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881c5d84c80 R13: 0000000000000010 R14: 0000000000000000 R15: ffff8881d2690128 FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9c904c4000 CR3: 00000001d2b52000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vmk80xx_reset_device drivers/staging/comedi/drivers/vmk80xx.c:226 [inline] vmk80xx_auto_attach+0x13b1/0x17c0 drivers/staging/comedi/drivers/vmk80xx.c:814 comedi_auto_config+0x16e/0x250 drivers/staging/comedi/drivers.c:1067 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 really_probe+0x281/0x660 drivers/base/dd.c:509 driver_probe_device+0x104/0x210 drivers/base/dd.c:670 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777 bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454 __device_attach+0x217/0x360 drivers/base/dd.c:843 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 device_add+0xae6/0x16f0 drivers/base/core.c:2111 usb_set_configuration+0xdf6/0x1670 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+0x281/0x660 drivers/base/dd.c:509 driver_probe_device+0x104/0x210 drivers/base/dd.c:670 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777 bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454 __device_attach+0x217/0x360 drivers/base/dd.c:843 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 device_add+0xae6/0x16f0 drivers/base/core.c:2111 usb_new_device.cold+0x8c1/0x1016 drivers/usb/core/hub.c:2534 hub_port_connect drivers/usb/core/hub.c:5089 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x1ada/0x3590 drivers/usb/core/hub.c:5432 process_one_work+0x905/0x1570 kernel/workqueue.c:2269 worker_thread+0x96/0xe20 kernel/workqueue.c:2415 kthread+0x30b/0x410 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace 8425c817ce1da187 ]--- --- This bug is generated by a bot. 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