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=-5.6 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,URIBL_BLOCKED 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 9FC5CC10F14 for ; Fri, 12 Apr 2019 11:46:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7A1782171F for ; Fri, 12 Apr 2019 11:46:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728413AbfDLLqv (ORCPT ); Fri, 12 Apr 2019 07:46:51 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:47401 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727287AbfDLLqN (ORCPT ); Fri, 12 Apr 2019 07:46:13 -0400 Received: by mail-io1-f72.google.com with SMTP id b199so7546018iof.14 for ; Fri, 12 Apr 2019 04:46:13 -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=F4iqygl6G6Nxp1bDqFTZfsmZR6M7+MdVWV26GQdWnTE=; b=j3U9CphWdJmrSROcniqjC2stBPZs5/yerWFg2JBsFDB4yq3+rqGVIkZ+i816w5U1Is CAG5ALCCW8uibce55ravoXGqIkCzX936VZtr+sEjV+FpZBTbnZOuPD/QC9G7eMj9A+GY xo/DCjxl1D+IKc9ySCRnHRQUm2ZEZryLshpOHlu4sypHn11A+O/g3YFRiC/KW99Z5YQW NzOF2WlyyOjgLaFO3NxhWx4aRJk7u16G8tyZp0YWok/EzDRdux6rqHS1+J4fnoQVxivS t1jW2Q5eX3YPAQxIdZZt2KdRbudaEHUnPvTcq0FREoP2y9kSBoU62mq9LhlbleREPHK3 CS+Q== X-Gm-Message-State: APjAAAVjp6Hai6iXSdYXpGTKUpg/Y7LeQCN9/2fj2US/upZshL7QtCYA a5iW+Y/rbE74m5Mcrkp2rzhhCN2dB8Vdjhbs2Dd68DpN4mPi X-Google-Smtp-Source: APXvYqyAvRkBRmaceBPizwqMkR+jIKZk5mIU6GXJYCs0DqyiS2sh0R8CK9cglr4A60LHV+/OhjKq4BJbbh3BPpGnTa4ZhUy6pviZ MIME-Version: 1.0 X-Received: by 2002:a24:33cc:: with SMTP id k195mr2429234itk.36.1555069572727; Fri, 12 Apr 2019 04:46:12 -0700 (PDT) Date: Fri, 12 Apr 2019 04:46:12 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000007bd948058653d9a5@google.com> Subject: KASAN: stack-out-of-bounds Read in string From: syzbot To: andreyknvl@google.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, rafael@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 9a33b369 usb-fuzzer: main usb gadget fuzzer driver git tree: https://github.com/google/kasan/tree/usb-fuzzer console output: https://syzkaller.appspot.com/x/log.txt?x=116f9cd3200000 kernel config: https://syzkaller.appspot.com/x/.config?x=23e37f59d94ddd15 dashboard link: https://syzkaller.appspot.com/bug?extid=b75b85111c10b8d680f1 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=161ebce3200000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16fd974b200000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+b75b85111c10b8d680f1@syzkaller.appspotmail.com usb 1-1: config 0 has no interface number 0 usb 1-1: New USB device found, idVendor=0424, idProduct=012c, bcdDevice=1a.78 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? ================================================================== BUG: KASAN: stack-out-of-bounds in string+0x1f6/0x220 lib/vsprintf.c:606 Read of size 1 at addr ffff88809ee2f260 by task kworker/0:2/539 CPU: 0 PID: 539 Comm: kworker/0:2 Not tainted 5.1.0-rc4-319354-g9a33b36 #3 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+0xe8/0x16e lib/dump_stack.c:113 print_address_description+0x6c/0x236 mm/kasan/report.c:187 kasan_report.cold+0x1a/0x3c mm/kasan/report.c:317 string+0x1f6/0x220 lib/vsprintf.c:606 vsnprintf+0xa14/0x16b0 lib/vsprintf.c:2396 pointer+0x60b/0x910 lib/vsprintf.c:2038 vsnprintf+0x5a0/0x16b0 lib/vsprintf.c:2400 vscnprintf+0x29/0x80 lib/vsprintf.c:2499 vprintk_store+0x45/0x4a0 kernel/printk/printk.c:1900 vprintk_emit+0x210/0x5a0 kernel/printk/printk.c:1957 dev_vprintk_emit+0x50e/0x553 drivers/base/core.c:3185 dev_printk_emit+0xbf/0xf6 drivers/base/core.c:3196 __dev_printk+0x1ed/0x215 drivers/base/core.c:3208 _dev_info+0xdc/0x10e drivers/base/core.c:3254 vub300_probe+0x25e/0xd80 drivers/mmc/host/vub300.c:2109 usb_probe_interface+0x31d/0x820 drivers/usb/core/driver.c:361 really_probe+0x2da/0xb10 drivers/base/dd.c:509 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_set_configuration+0xdf7/0x1740 drivers/usb/core/message.c:2021 generic_probe+0xa2/0xda drivers/usb/core/generic.c:210 usb_probe_device+0xc0/0x150 drivers/usb/core/driver.c:266 really_probe+0x2da/0xb10 drivers/base/dd.c:509 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_new_device.cold+0x537/0xccf 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+0x138e/0x3b00 drivers/usb/core/hub.c:5432 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 worker_thread+0x9b/0xe20 kernel/workqueue.c:2415 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 The buggy address belongs to the page: page:ffffea00027b8bc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0xfff00000000000() raw: 00fff00000000000 ffffea00027b8bc8 ffffea00027b8bc8 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809ee2f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88809ee2f180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ffff88809ee2f200: 00 00 f1 f1 f1 f1 f1 f1 00 00 00 00 f2 f2 f2 f2 ^ ffff88809ee2f280: 00 00 00 00 f2 f2 f2 f2 00 00 00 00 00 00 f3 f3 ffff88809ee2f300: f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- This bug is generated by a bot. 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