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=unavailable 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 BEC45C3A59F for ; Mon, 19 Aug 2019 01:38:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9C6A321773 for ; Mon, 19 Aug 2019 01:38:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726442AbfHSBiH (ORCPT ); Sun, 18 Aug 2019 21:38:07 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:53575 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726103AbfHSBiH (ORCPT ); Sun, 18 Aug 2019 21:38:07 -0400 Received: by mail-io1-f71.google.com with SMTP id h3so2444449iob.20 for ; Sun, 18 Aug 2019 18:38:06 -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=W/SfHvQsi/O7hExDLyePq7I/o/3HakjIf/4ara3zjQw=; b=shRGIE/wAJBxDuASGcxhy376CwxI5gPMkn7lqbxFk5IIOTxeW3aMTHxRTtqMBTQjBO cmhUtVvSjxfytBP2/JvughpDxlvKrgTzfRIdPQMBaCTHZUGrtB88qd8OAJAIHwzrbBvT qtM22lv7mS+5wD8gcOx57PO/A3IQkONa/jWIIC8SXl90Tdwi3sYHxwkgZXquCKr3r+gd HyA0CpC2g/Pfx6ZyFfMvfacqV9oAAXrMWgBVTKHWwdeZtMZzvBewMoZF/HrCjyhYjENZ oA/b5keSkGn7nywNq4YE1I1JlfWxPqarXhqiOH1uMaCyl4RZetUqs15h7YjFb8ETtPU6 89nw== X-Gm-Message-State: APjAAAVDsbxXA/NE72zsfC52hGpbf8SC17YIA/BovqZLtAN1/ZUBxGZy FZ1MZYf75Aiz8nsZj32TjE9Xk4oiWAcSaZUN44usJxJRmC8t X-Google-Smtp-Source: APXvYqzD7e1kKK+nzpNwI9S8lEk1UasqDfdZU3S5YckHlOrgtQa88Z70x4JEKTPuCjFjwbTwk6enGO1oMArvVhZCzDljZJeMssXH MIME-Version: 1.0 X-Received: by 2002:a05:6602:cc:: with SMTP id z12mr16650712ioe.86.1566178686389; Sun, 18 Aug 2019 18:38:06 -0700 (PDT) Date: Sun, 18 Aug 2019 18:38:06 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000041d63f05906e6486@google.com> Subject: KMSAN: uninit-value in gp8psk_power_ctrl From: syzbot To: corbet@lwn.net, glider@google.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@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: f75e4cfe kmsan: use kmsan_handle_urb() in urb.c git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=158867eea00000 kernel config: https://syzkaller.appspot.com/x/.config?x=602468164ccdc30a dashboard link: https://syzkaller.appspot.com/bug?extid=fa2759b292234f21d29f compiler: clang version 9.0.0 (/home/glider/llvm/clang 06d00afa61eef8f7f501ebdb4e8612ea43ec2d78) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13688dbaa00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10595a5aa00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+fa2759b292234f21d29f@syzkaller.appspotmail.com usb 1-1: config 0 has an invalid interface number: 130 but max is 0 usb 1-1: config 0 has no interface number 0 usb 1-1: New USB device found, idVendor=09c0, idProduct=0206, bcdDevice=ce.c9 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? dvb-usb: found a 'Genpix SkyWalker-2 DVB-S receiver' in warm state. gp8psk: usb in 128 operation failed. ================================================================== BUG: KMSAN: uninit-value in gp8psk_power_ctrl+0x33e/0xca0 drivers/media/usb/dvb-usb/gp8psk.c:193 CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.1.0+ #1 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+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x130/0x2a0 mm/kmsan/kmsan.c:622 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:310 gp8psk_power_ctrl+0x33e/0xca0 drivers/media/usb/dvb-usb/gp8psk.c:193 dvb_usb_device_power_ctrl drivers/media/usb/dvb-usb/dvb-usb-init.c:226 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:160 [inline] dvb_usb_device_init+0x15ad/0x2cc0 drivers/media/usb/dvb-usb/dvb-usb-init.c:277 gp8psk_usb_probe+0xa2/0x190 drivers/media/usb/dvb-usb/gp8psk.c:307 usb_probe_interface+0xd66/0x1320 drivers/usb/core/driver.c:361 really_probe+0xdae/0x1d80 drivers/base/dd.c:513 driver_probe_device+0x1b3/0x4f0 drivers/base/dd.c:671 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:778 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x454/0x730 drivers/base/dd.c:844 device_initial_probe+0x4a/0x60 drivers/base/dd.c:891 bus_probe_device+0x137/0x390 drivers/base/bus.c:514 device_add+0x288d/0x30e0 drivers/base/core.c:2106 usb_set_configuration+0x30dc/0x3750 drivers/usb/core/message.c:2027 generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210 usb_probe_device+0x14c/0x200 drivers/usb/core/driver.c:266 really_probe+0xdae/0x1d80 drivers/base/dd.c:513 driver_probe_device+0x1b3/0x4f0 drivers/base/dd.c:671 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:778 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x454/0x730 drivers/base/dd.c:844 device_initial_probe+0x4a/0x60 drivers/base/dd.c:891 bus_probe_device+0x137/0x390 drivers/base/bus.c:514 device_add+0x288d/0x30e0 drivers/base/core.c:2106 usb_new_device+0x23e5/0x2ff0 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+0x48d1/0x7290 drivers/usb/core/hub.c:5432 process_one_work+0x1572/0x1f00 kernel/workqueue.c:2269 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415 kthread+0x4b5/0x4f0 kernel/kthread.c:254 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 Local variable description: ----status@gp8psk_power_ctrl Variable was created at: gp8psk_power_ctrl+0x63/0xca0 drivers/media/usb/dvb-usb/gp8psk.c:188 dvb_usb_device_power_ctrl drivers/media/usb/dvb-usb/dvb-usb-init.c:226 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:160 [inline] dvb_usb_device_init+0x15ad/0x2cc0 drivers/media/usb/dvb-usb/dvb-usb-init.c:277 ================================================================== --- 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