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 BA2CCFC6196 for ; Fri, 8 Nov 2019 13:24:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9064E21D6C for ; Fri, 8 Nov 2019 13:24:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729509AbfKHNYL (ORCPT ); Fri, 8 Nov 2019 08:24:11 -0500 Received: from mail-il1-f197.google.com ([209.85.166.197]:50148 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728080AbfKHNYK (ORCPT ); Fri, 8 Nov 2019 08:24:10 -0500 Received: by mail-il1-f197.google.com with SMTP id c2so6835432ilj.16 for ; Fri, 08 Nov 2019 05:24:09 -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=k6rWSrCH+B9Jd6WH+X8UPKLnWKoZJm+fASwqYuNhQpk=; b=K5oeEZR10C7KP2ZhQYdkoLIGS1jHkj6xoM6xce1bfc6s7I/ASgbHudGHkiVN8ej76w gDFcWgBNGhf1DHbHFOfegluv7lJr36/zZ2m+nbNFVkoPpqsOlawRXuLXF+6s19FPXwCj G0k2VVzkmn4ZDpqoGrMVOH1PKSeQ5QyBRUenY4onOc+tkX+R4CcAMTOrpz7ojD5sX1yY B7yISu9Vxf4sMjwKbqpkjLSjHosKG3CPgSRkxmD+GpLrgyGiIWm+zlT1jp5QU9H8Y7EW 4hto/dfSIvC8OEX5tGKn1PSvvPuzsgvktkZsdkiKquQUXbd2azFetskQ3aRIV09IhGdU iI9Q== X-Gm-Message-State: APjAAAUvWtCYKf4R3lVLptu2YY07lfwEiTnlbwJONa+J1/P/CdZFk/VX y0gaBBehf9iMQVY8ojfyVNSMDdErLImZ3FAYCU/O/vYdXve8 X-Google-Smtp-Source: APXvYqxiQYam70pFTZKKvemyLSFSePUvZrfpJyIMdbbx9qHr25wod5/P7TvEdjxC5gkFI4I82A+FfZqm1gTzJYl8wcEtKxZ7NyEL MIME-Version: 1.0 X-Received: by 2002:a5d:8447:: with SMTP id w7mr9680876ior.127.1573219449383; Fri, 08 Nov 2019 05:24:09 -0800 (PST) Date: Fri, 08 Nov 2019 05:24:09 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006f35f00596d5b2e5@google.com> Subject: KMSAN: uninit-value in sd_init (2) From: syzbot To: glider@google.com, gregkh@linuxfoundation.org, hverkuil@xs4all.nl, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, swinslow@gmail.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de 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: c2453450 kmsan: kcov: prettify the code unpoisoning area->.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=17c09e53600000 kernel config: https://syzkaller.appspot.com/x/.config?x=3684f3c73f43899a dashboard link: https://syzkaller.appspot.com/bug?extid=32310fc2aea76898d074 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12f43227600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=123bd353600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+32310fc2aea76898d074@syzkaller.appspotmail.com usb 1-1: New USB device found, idVendor=04f1, idProduct=1001, bcdDevice=c3.b5 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? gspca_main: sunplus-2.14.0 probing 04f1:1001 gspca_sunplus: reg_w_riv err -71 ===================================================== BUG: KMSAN: uninit-value in spca504B_PollingDataReady drivers/media/usb/gspca/sunplus.c:405 [inline] BUG: KMSAN: uninit-value in sd_init+0x5cef/0x6060 drivers/media/usb/gspca/sunplus.c:639 CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.4.0-rc3+ #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+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x14a/0x2f0 mm/kmsan/kmsan_report.c:109 __msan_warning+0x73/0xf0 mm/kmsan/kmsan_instr.c:245 spca504B_PollingDataReady drivers/media/usb/gspca/sunplus.c:405 [inline] sd_init+0x5cef/0x6060 drivers/media/usb/gspca/sunplus.c:639 gspca_dev_probe2+0xe93/0x2230 drivers/media/usb/gspca/gspca.c:1532 gspca_dev_probe+0x346/0x3b0 drivers/media/usb/gspca/gspca.c:1605 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:511 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361 really_probe+0xd91/0x1f90 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430 __device_attach+0x489/0x750 drivers/base/dd.c:894 device_initial_probe+0x4a/0x60 drivers/base/dd.c:941 bus_probe_device+0x131/0x390 drivers/base/bus.c:490 device_add+0x25b5/0x2df0 drivers/base/core.c:2201 usb_set_configuration+0x309f/0x3710 drivers/usb/core/message.c:2027 generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210 usb_probe_device+0x146/0x200 drivers/usb/core/driver.c:266 really_probe+0xd91/0x1f90 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430 __device_attach+0x489/0x750 drivers/base/dd.c:894 device_initial_probe+0x4a/0x60 drivers/base/dd.c:941 bus_probe_device+0x131/0x390 drivers/base/bus.c:490 device_add+0x25b5/0x2df0 drivers/base/core.c:2201 usb_new_device+0x23e5/0x2fb0 drivers/usb/core/hub.c:2536 hub_port_connect drivers/usb/core/hub.c:5098 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x581d/0x72f0 drivers/usb/core/hub.c:5441 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415 kthread+0x4b5/0x4f0 kernel/kthread.c:256 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:150 [inline] kmsan_internal_poison_shadow+0x60/0x110 mm/kmsan/kmsan.c:133 kmsan_slab_alloc+0xaa/0x130 mm/kmsan/kmsan_hooks.c:101 slab_alloc_node mm/slub.c:2792 [inline] slab_alloc mm/slub.c:2801 [inline] kmem_cache_alloc_trace+0x8c5/0xd20 mm/slub.c:2818 kmalloc include/linux/slab.h:556 [inline] gspca_dev_probe2+0x30d/0x2230 drivers/media/usb/gspca/gspca.c:1464 gspca_dev_probe+0x346/0x3b0 drivers/media/usb/gspca/gspca.c:1605 sd_probe+0x8d/0xa0 drivers/media/usb/gspca/gl860/gl860.c:511 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361 really_probe+0xd91/0x1f90 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430 __device_attach+0x489/0x750 drivers/base/dd.c:894 device_initial_probe+0x4a/0x60 drivers/base/dd.c:941 bus_probe_device+0x131/0x390 drivers/base/bus.c:490 device_add+0x25b5/0x2df0 drivers/base/core.c:2201 usb_set_configuration+0x309f/0x3710 drivers/usb/core/message.c:2027 generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210 usb_probe_device+0x146/0x200 drivers/usb/core/driver.c:266 really_probe+0xd91/0x1f90 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430 __device_attach+0x489/0x750 drivers/base/dd.c:894 device_initial_probe+0x4a/0x60 drivers/base/dd.c:941 bus_probe_device+0x131/0x390 drivers/base/bus.c:490 device_add+0x25b5/0x2df0 drivers/base/core.c:2201 usb_new_device+0x23e5/0x2fb0 drivers/usb/core/hub.c:2536 hub_port_connect drivers/usb/core/hub.c:5098 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x581d/0x72f0 drivers/usb/core/hub.c:5441 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 ===================================================== --- This bug is generated by a bot. 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