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 EDC22FA372C for ; Fri, 8 Nov 2019 13:24:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BAA8E21848 for ; Fri, 8 Nov 2019 13:24:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730074AbfKHNYO (ORCPT ); Fri, 8 Nov 2019 08:24:14 -0500 Received: from mail-il1-f198.google.com ([209.85.166.198]:35767 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728080AbfKHNYM (ORCPT ); Fri, 8 Nov 2019 08:24:12 -0500 Received: by mail-il1-f198.google.com with SMTP id w69so6900285ilk.2 for ; Fri, 08 Nov 2019 05:24:10 -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=Xg4K1fggR6L/WmEQF2suk0G83y8UDvhYyhUB0WEbMPM=; b=eZP4pZXNEaGjATgWpzxcD4j5QA43+x15cZ9rc7LHzgDel1WPhaaoFX12jEtjtRui8m TTowoQGRr+HZJdnTqzM60pL0GtOg1NWJrLPxo6ahxIFAqG6ZXISNMY0J2alqEz7xUtSr Yup18EGVdsom0CEG96yLb4cloCiGV6GocmeM4R610FadXEm0G9jnfP405PJs007q2iM2 pDbi6kD9wF4px0ZPQrz9uFfF20/Wta6nGOmOtKFSNLLsy1mi1pY7ZUz1p6yyl2OLBjSb jE3Obct718tmTO/cxNt7k2IJTtui8r4B2l/upU076cEXfRCEJ3z78ZensU8YecLWrrr2 2O0w== X-Gm-Message-State: APjAAAXgpVpWwVM6NZdjlMEdx0fTh3Tg1LBTZdhjWwxTFuljpYdWv9eW iWmlSX/xaXy8dbPt0uZ35i9FBttxbW6WLxD41bl1rg3R81w0 X-Google-Smtp-Source: APXvYqxO2xCEf+l7hDzqfk7SCYQdh0U1Uriu0QZt06kn7nP8HyXlB+3TdIPsVXvaOWFxMjA1aa5R49ho0adFVsmRkyPsv/+wmY/G MIME-Version: 1.0 X-Received: by 2002:a5d:9b0f:: with SMTP id y15mr9661634ion.35.1573219450030; Fri, 08 Nov 2019 05:24:10 -0800 (PST) Date: Fri, 08 Nov 2019 05:24:10 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000079154e0596d5b299@google.com> Subject: KMSAN: uninit-value in dvb_usb_adapter_dvb_init From: syzbot To: glider@google.com, hverkuil-cisco@xs4all.nl, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mail@maciej.szmigiero.name, 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: 6f88939b kmsan: don't unpoison memory in do_read_cache_pag.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=101311a2e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=9e324dfe9c7b0360 dashboard link: https://syzkaller.appspot.com/bug?extid=ec869945d3dde5f33b43 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+ec869945d3dde5f33b43@syzkaller.appspotmail.com vp7045: USB control message 'out' went wrong. vp7045: USB control message 'out' went wrong. vp7045: USB control message 'out' went wrong. vp7045: USB control message 'out' went wrong. ===================================================== BUG: KMSAN: uninit-value in mac_address_string+0xcd5/0x1000 lib/vsprintf.c:604 CPU: 0 PID: 13542 Comm: kworker/0:7 Not tainted 5.4.0-rc5+ #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+0x128/0x220 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245 mac_address_string+0xcd5/0x1000 lib/vsprintf.c:604 pointer+0x56d/0x1d10 lib/vsprintf.c:2148 vsnprintf+0x1c0c/0x3210 lib/vsprintf.c:2514 vscnprintf+0xc2/0x180 lib/vsprintf.c:2613 vprintk_store+0xef/0x11e0 kernel/printk/printk.c:1922 vprintk_emit+0x2c6/0x860 kernel/printk/printk.c:1984 vprintk_default+0x90/0xa0 kernel/printk/printk.c:2029 vprintk_func+0x635/0x810 kernel/printk/printk_safe.c:386 printk+0x180/0x1c3 kernel/printk/printk.c:2062 dvb_usb_adapter_dvb_init+0x90e/0x13f0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:166 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:83 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] dvb_usb_device_init+0x22fe/0x2e10 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 vp7045_usb_probe+0x73/0x80 drivers/media/usb/dvb-usb/vp7045.c:164 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:2202 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:2202 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 stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline] kmsan_internal_chain_origin+0xbd/0x180 mm/kmsan/kmsan.c:319 __msan_chain_origin+0x6b/0xd0 mm/kmsan/kmsan_instr.c:179 vp7045_read_eeprom drivers/media/usb/dvb-usb/vp7045.c:123 [inline] vp7045_read_mac_addr+0x62e/0xbe0 drivers/media/usb/dvb-usb/vp7045.c:132 dvb_usb_adapter_dvb_init+0x890/0x13f0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:165 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:83 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline] dvb_usb_device_init+0x22fe/0x2e10 drivers/media/usb/dvb-usb/dvb-usb-init.c:287 vp7045_usb_probe+0x73/0x80 drivers/media/usb/dvb-usb/vp7045.c:164 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:2202 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:2202 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 Local variable description: ----br.i@vp7045_read_mac_addr Variable was created at: vp7045_read_eeprom drivers/media/usb/dvb-usb/vp7045.c:119 [inline] vp7045_read_mac_addr+0x7b/0xbe0 drivers/media/usb/dvb-usb/vp7045.c:132 vp7045_read_eeprom drivers/media/usb/dvb-usb/vp7045.c:119 [inline] vp7045_read_mac_addr+0x7b/0xbe0 drivers/media/usb/dvb-usb/vp7045.c:132 ===================================================== --- 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.