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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 18E1DC0650F for ; Tue, 30 Jul 2019 09:38:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E700E20665 for ; Tue, 30 Jul 2019 09:38:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731735AbfG3JiH (ORCPT ); Tue, 30 Jul 2019 05:38:07 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:53527 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731718AbfG3JiH (ORCPT ); Tue, 30 Jul 2019 05:38:07 -0400 Received: by mail-io1-f69.google.com with SMTP id h3so70820454iob.20 for ; Tue, 30 Jul 2019 02:38:07 -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=2OxJdfFz7EXPUFxZSAkGeqLhpVqopEfytgC58RNP5Gc=; b=AIyShEfCh6DrFWr0AUKcvM8qaOuJCAZF6Eg14hTcOxmhcyz3pRewNN6PlZy5ByY9Ep b3JJeGPsdRWrOiv6mxc0D3KKh/b7SdE0yOI9O5OmhR92tfu7kEkVJwpgSg8mF6ISh9cP 3Yxxi1ukht4ds/JzgHbPDZmRdyQKEXdvhy0RqLp899I+6ODhtp0NkInsSGX8Lon+Citi eTLmmn5e3pjh2b6mD5yxdxzeRU5sAUvyxFmOhSibIMxJd5rFYQCX5d8VYdxcjRM6p4Z1 PpfSzKQkkriyk/8WrOWpLe+iW0seW58/F2bhosKVHCZDZd8xuvOFcVkeUyM9/xXuaSU7 eI7A== X-Gm-Message-State: APjAAAWfk3hAY1klJ6wEvuK3k7gWLvPjkxDODcycIl7u0eXw+XnxvvT2 UJ1py+T/DYLSGqmHRyP2PG2q01yiWn5WA88VA9hCpLA2Zsz5 X-Google-Smtp-Source: APXvYqw5hgWauHtzaXEFR1NpdBVBL9tsFEOEgmMAiftBVH8cSyfGBBbn6hV47aB3GYF1zBU2F9cUNyLG8jyNxk2ysFfHtl80CPG6 MIME-Version: 1.0 X-Received: by 2002:a6b:f203:: with SMTP id q3mr57765986ioh.208.1564479486675; Tue, 30 Jul 2019 02:38:06 -0700 (PDT) Date: Tue, 30 Jul 2019 02:38:06 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000000fd432058ee2c46c@google.com> Subject: KMSAN: uninit-value in read_eprom_word From: syzbot To: davem@davemloft.net, glider@google.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 3351e2b9 usb-fuzzer: main usb gadget fuzzer driver git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=13105d85a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=40511ad0c5945201 dashboard link: https://syzkaller.appspot.com/bug?extid=3499a83b2d062ae409d4 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1257755ea00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1327e5a5a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+3499a83b2d062ae409d4@syzkaller.appspotmail.com usb 1-1: Using ep0 maxpacket: 8 usb 1-1: config 0 has an invalid interface number: 150 but max is 0 usb 1-1: config 0 has no interface number 0 usb 1-1: New USB device found, idVendor=050d, idProduct=0122, bcdDevice=c1.69 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? ================================================================== BUG: KMSAN: uninit-value in read_eprom_word+0x947/0xdd0 drivers/net/usb/pegasus.c:298 CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.2.0-rc4+ #5 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+0x162/0x2d0 mm/kmsan/kmsan.c:611 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:304 read_eprom_word+0x947/0xdd0 drivers/net/usb/pegasus.c:298 get_interrupt_interval drivers/net/usb/pegasus.c:758 [inline] pegasus_probe+0xf2b/0x4be0 drivers/net/usb/pegasus.c:1192 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361 really_probe+0x1344/0x1d90 drivers/base/dd.c:513 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:670 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:777 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x489/0x750 drivers/base/dd.c:843 device_initial_probe+0x4a/0x60 drivers/base/dd.c:890 bus_probe_device+0x131/0x390 drivers/base/bus.c:514 device_add+0x25b5/0x2df0 drivers/base/core.c:2111 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+0x1344/0x1d90 drivers/base/dd.c:513 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:670 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:777 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x489/0x750 drivers/base/dd.c:843 device_initial_probe+0x4a/0x60 drivers/base/dd.c:890 bus_probe_device+0x131/0x390 drivers/base/bus.c:514 device_add+0x25b5/0x2df0 drivers/base/core.c:2111 usb_new_device+0x23e5/0x2fb0 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+0x5853/0x7320 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:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 Local variable description: ----data.addr.i13@read_eprom_word Variable was created at: set_register drivers/net/usb/pegasus.c:174 [inline] read_eprom_word+0x498/0xdd0 drivers/net/usb/pegasus.c:294 get_interrupt_interval drivers/net/usb/pegasus.c:758 [inline] pegasus_probe+0xf2b/0x4be0 drivers/net/usb/pegasus.c:1192 ================================================================== --- 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