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 CD4D9C10F14 for ; Thu, 3 Oct 2019 19:59:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A9FDE21848 for ; Thu, 3 Oct 2019 19:59:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388076AbfJCT7L (ORCPT ); Thu, 3 Oct 2019 15:59:11 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:50479 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388067AbfJCT7K (ORCPT ); Thu, 3 Oct 2019 15:59:10 -0400 Received: by mail-io1-f71.google.com with SMTP id f5so6992254iob.17 for ; Thu, 03 Oct 2019 12:59:08 -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=JEuIBFRKOYSaCm47uiBoRRTJNID9dTGxtLXD6DzuDZY=; b=eDoNx1Orc/Y+KibSpIwSXp2dquHcXnNiSKCTunuHVmYFMHUmu9Cf71iHZMeTJ04vDx B+4PLU3I9PfusFsB496NfrlI1XhOq0XARiF4yvBrre5wpTTsm7VMquynEMZenkjTBpu0 8G/PTeXPc3VFnbavlMM4XpuumNTQ1viBDRVUlzi7zoAA+rEuLPrMnMYJrR/w12uH2DJe rrRo2gedljJGEcxP3nO4m6k2ZlSfNUnsDu84uIZaubMplzLme1e9uzhscrqYL4SHZON9 I8th3v7b+Uxin72qDxTYrXNALd3ogYmky7tu0K68uJgPNYoI84PerEwNVPZLo+EnwnFI SUFw== X-Gm-Message-State: APjAAAWYYq+RRat47lzSsCoCT5OjOso9pwOeyIqBmoicY9dEzHLDxLzj d/rG79JZucsnQLEx3B8beKxu2Y7Y1B53fx6PUhJ82z9uRbVR X-Google-Smtp-Source: APXvYqy+RxsZP3ma9cwKHBKOlLQeJwioBfJmorc3/irw9xRcpPg1SmLigkk1KVDYmTwYI7Byg3cM1SFi2oKLTtXT4jTkVZxSuUxb MIME-Version: 1.0 X-Received: by 2002:a92:874e:: with SMTP id d14mr11664979ilm.143.1570132748472; Thu, 03 Oct 2019 12:59:08 -0700 (PDT) Date: Thu, 03 Oct 2019 12:59:08 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b91acc05940704bc@google.com> Subject: KMSAN: uninit-value in pegasus_probe From: syzbot To: glider@google.com, gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, syzkaller-bugs@googlegroups.com, yuehaibing@huawei.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: 124037e0 kmsan: drop inlines, rename do_kmsan_task_create() git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=11d1ff6d600000 kernel config: https://syzkaller.appspot.com/x/.config?x=f03c659d0830ab8d dashboard link: https://syzkaller.appspot.com/bug?extid=02c9f70f3afae308464a compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1115ed6b600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=144964cb600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+02c9f70f3afae308464a@syzkaller.appspotmail.com usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1: Product: syz usb 1-1: Manufacturer: syz usb 1-1: SerialNumber: syz usb 1-1: config 0 descriptor?? (unnamed net_device) (uninitialized): read_eprom_word failed ===================================================== BUG: KMSAN: uninit-value in usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361 CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.0-rc7+ #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+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250 get_interrupt_interval drivers/net/usb/pegasus.c:758 [inline] pegasus_probe+0x10b7/0x4be0 drivers/net/usb/pegasus.c:1189 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361 really_probe+0x1373/0x1dc0 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x489/0x750 drivers/base/dd.c:882 device_initial_probe+0x4a/0x60 drivers/base/dd.c:929 bus_probe_device+0x131/0x390 drivers/base/bus.c:514 device_add+0x25b5/0x2df0 drivers/base/core.c:2165 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+0x1373/0x1dc0 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x489/0x750 drivers/base/dd.c:882 device_initial_probe+0x4a/0x60 drivers/base/dd.c:929 bus_probe_device+0x131/0x390 drivers/base/bus.c:514 device_add+0x25b5/0x2df0 drivers/base/core.c:2165 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: ----data.i@pegasus_probe Variable was created at: get_interrupt_interval drivers/net/usb/pegasus.c:1188 [inline] pegasus_probe+0xef3/0x4be0 drivers/net/usb/pegasus.c:1189 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361 ===================================================== --- 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