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 DCFD1FA372C for ; Fri, 8 Nov 2019 13:24:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B173C21924 for ; Fri, 8 Nov 2019 13:24:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728180AbfKHNYK (ORCPT ); Fri, 8 Nov 2019 08:24:10 -0500 Received: from mail-il1-f197.google.com ([209.85.166.197]:33210 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728002AbfKHNYK (ORCPT ); Fri, 8 Nov 2019 08:24:10 -0500 Received: by mail-il1-f197.google.com with SMTP id z14so6891762ill.0 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=N7idjJ2WZG0PfBmowKBwGjFpannAqkPlZj0m46g9pEs=; b=nFsyM4SHUxvZvsq5B/q36k2G6UHo4LESNpeGGy+3iy0q6DvkLfmajCIwlgoYTZh4KV mpvSNuetZg513eEOk+dMBsCazN0mssJ3pXUfd7cVn4lsn50YihruTpOwnvyM2RqMc+zr +O43EeqVmZdDBYwVoDysXFMInzdUd+fF4BMtI0SXuORDKeEeRL2m8ON1jHYY7KVarNF+ 8eJkEzH8iLbmbYAPo4Ezmyw34nh3EGtI3llPhKuZZUN/HUAuqWSGdOhIHYP8mwi/2bTP nWsTiMM3+W7mQOBKhqTvo9zriXEpwokZZNCzr4wp0VaAv0McW2Vh/XDmvRdjXaeHHatM gKMA== X-Gm-Message-State: APjAAAXc+UJoY+9I8gat3mXS7LRNC2Jn5KsF46ZtbfpI7w3qLPxQ3C44 eK0rmK8TS8xVy1cEcOeKKnA5cBEh2JZJHvNyJ+7KZXOkAiXW X-Google-Smtp-Source: APXvYqwqLk3ZzNpv8jVp8owRJGkbeaaDpIThJOKLDE43Zlf5p8aQBhAVveg/JNeDFmDevyuIU9+WxHUf4RjD5wrIkcKZI8P3LweP MIME-Version: 1.0 X-Received: by 2002:a6b:8d8f:: with SMTP id p137mr6165701iod.53.1573219449059; 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: <0000000000006a44570596d5b2d1@google.com> Subject: KMSAN: uninit-value in number From: syzbot To: glider@google.com, gregkh@linuxfoundation.org, kstewart@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, rfontana@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: ba606e9d Revert "printk_safe: externalize printk_context" git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=1251b828e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=c07a3d4f8a59e198 dashboard link: https://syzkaller.appspot.com/bug?extid=9d42b7773d2fecd983ab compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=140be8e4e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13eb1edf600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+9d42b7773d2fecd983ab@syzkaller.appspotmail.com usb 1-1: config 0 has no interface number 0 usb 1-1: New USB device found, idVendor=15a4, idProduct=9020, bcdDevice=ba.2a usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? ===================================================== BUG: KMSAN: uninit-value in number+0x32e/0x1e40 lib/vsprintf.c:436 CPU: 1 PID: 3904 Comm: kworker/1:2 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+0x128/0x220 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245 number+0x32e/0x1e40 lib/vsprintf.c:436 vsnprintf+0x1e99/0x3210 lib/vsprintf.c:2576 vscnprintf+0xc2/0x180 lib/vsprintf.c:2613 vprintk_store+0xef/0x11e0 kernel/printk/printk.c:1921 vprintk_emit+0x2fd/0x8d0 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 af9005_boot_packet+0xedc/0x17d0 drivers/media/usb/dvb-usb/af9005.c:607 af9005_identify_state+0x13e/0x420 drivers/media/usb/dvb-usb/af9005.c:969 dvb_usb_find_device drivers/media/usb/dvb-usb/dvb-usb-init.c:221 [inline] dvb_usb_device_init+0xb72/0x2e10 drivers/media/usb/dvb-usb/dvb-usb-init.c:258 af9005_usb_probe+0x73/0x80 drivers/media/usb/dvb-usb/af9005.c:992 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 Local variable description: ----act_len@af9005_boot_packet Variable was created at: af9005_boot_packet+0x98/0x17d0 drivers/media/usb/dvb-usb/af9005.c:559 af9005_boot_packet+0x98/0x17d0 drivers/media/usb/dvb-usb/af9005.c:559 ===================================================== --- 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