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=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 29DBAC2BCA1 for ; Fri, 7 Jun 2019 21:53:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E461820868 for ; Fri, 7 Jun 2019 21:53:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731499AbfFGVxH (ORCPT ); Fri, 7 Jun 2019 17:53:07 -0400 Received: from mail-it1-f199.google.com ([209.85.166.199]:38156 "EHLO mail-it1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729810AbfFGVxG (ORCPT ); Fri, 7 Jun 2019 17:53:06 -0400 Received: by mail-it1-f199.google.com with SMTP id j83so2966016ita.3 for ; Fri, 07 Jun 2019 14:53:05 -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=nXaF6BflGlbYB1uaA9t1b5FLsqtpwLwJtk7m3M3w/9Q=; b=jF2zuq+RDwgM/pMhl6PcrfROyClI/Wv9kMVZerG2nP22AVz7ptf8RHGNARc6spENDB sxfI/QG+sZt3x4oA05RlLkIHwUxc/FIWCIKyJzyQgE+f1snV99CEMopPe0vJzOhfuoWD Yh+YayzASExrZ3ZsgL1i6bgXP+msHanf/84qTVq7EOc/cL+1qMOtzQfxpKZaQq8P5DO+ bO18mmsvjxPtv3KH+LQMZsiJ50M29c7QYKz1wV3iLe4jcQlIPzD/Te8QHqSQJTKZg0UA hca/2tBqLC+eilA0Vos+xNXf8eDOaDzzQjR6yJeJUP/YGUsMWdLJQTP+g/GT/KUe926q NPEw== X-Gm-Message-State: APjAAAX5J2tPhEcPOKtQdkEj4iaSaM+rdtJVoIVR4voFjH+WpUMMEcyw tYNjOOtPApbUlRfs/aNQ6AzaVpq17McKpvZoo5WM5ivC64rU X-Google-Smtp-Source: APXvYqw/CJqxEN3K/rLwxaL65HHSXdHQlP7JF9ccQwtvURNaoKjyljO2HjBAi8q/VK1pBjIGxEBEnxILICTanBjnuImytLHfD7a3 MIME-Version: 1.0 X-Received: by 2002:a05:6638:3d3:: with SMTP id r19mr38028074jaq.53.1559944385576; Fri, 07 Jun 2019 14:53:05 -0700 (PDT) Date: Fri, 07 Jun 2019 14:53:05 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f8c953058ac2dae4@google.com> Subject: KMSAN: uninit-value in read_sensor_register From: syzbot To: glider@google.com, hverkuil@xs4all.nl, 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: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=1454b01ea00000 kernel config: https://syzkaller.appspot.com/x/.config?x=602468164ccdc30a dashboard link: https://syzkaller.appspot.com/bug?extid=06ddf1788cfd048c5e82 compiler: clang version 9.0.0 (/home/glider/llvm/clang 06d00afa61eef8f7f501ebdb4e8612ea43ec2d78) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12cbead2a00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1683b761a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+06ddf1788cfd048c5e82@syzkaller.appspotmail.com usb 1-1: config 0 has an invalid interface number: 110 but max is 0 usb 1-1: config 0 has no interface number 0 usb 1-1: New USB device found, idVendor=0ac8, idProduct=c301, bcdDevice= 1.4a usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? gspca_main: vc032x-2.14.0 probing 0ac8:c301 gspca_vc032x: reg_w err -71 ================================================================== BUG: KMSAN: uninit-value in read_sensor_register+0x732/0x26a0 drivers/media/usb/gspca/vc032x.c:2975 CPU: 1 PID: 33 Comm: kworker/1:1 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 read_sensor_register+0x732/0x26a0 drivers/media/usb/gspca/vc032x.c:2975 vc032x_probe_sensor drivers/media/usb/gspca/vc032x.c:3036 [inline] sd_init+0x2f94/0x5330 drivers/media/usb/gspca/vc032x.c:3167 gspca_dev_probe2+0xee0/0x2240 drivers/media/usb/gspca/gspca.c:1546 gspca_dev_probe+0x346/0x3b0 drivers/media/usb/gspca/gspca.c:1619 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:523 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 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:208 [inline] kmsan_internal_poison_shadow+0x92/0x150 mm/kmsan/kmsan.c:162 kmsan_kmalloc+0xa4/0x130 mm/kmsan/kmsan_hooks.c:175 kmem_cache_alloc_trace+0x503/0xae0 mm/slub.c:2801 kmalloc include/linux/slab.h:547 [inline] gspca_dev_probe2+0x30c/0x2240 drivers/media/usb/gspca/gspca.c:1480 gspca_dev_probe+0x346/0x3b0 drivers/media/usb/gspca/gspca.c:1619 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:523 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 ================================================================== --- This bug is generated by a bot. 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