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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,URIBL_BLOCKED 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 872CAC10F0E for ; Fri, 12 Apr 2019 11:46:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 51D6A2171F for ; Fri, 12 Apr 2019 11:46:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727905AbfDLLqZ (ORCPT ); Fri, 12 Apr 2019 07:46:25 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:51803 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727394AbfDLLqO (ORCPT ); Fri, 12 Apr 2019 07:46:14 -0400 Received: by mail-io1-f72.google.com with SMTP id y18so7461169ior.18 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=0j+5G7dPg/greaUurhDWLjbBlvZfWbXBvqNdnkHvllc=; b=LtHg1Al0tgucRumxXvHYDB1leZ/ZEwsRx2n+b8OPVesoWHn8hSskinRzRxXxEDYf/3 0vLnlZ9iUX6A1VgskSCb9O/xk9frmEXRfJ44vjVP2i6f7ag/Eik+oiJSUBsMEgBs+m5I u/cSSPVjoYQw3BId+uPsdJaQR61bkOhakfkpRwHTu5ISdy3QusgVQpxxD4wCycJP2reQ iqQlnUFxaXlL0PKGfW+WxCGGni62GN665PEPWwbrs08V+60qpN2FXYNCvg7dRSzbsjyr I9BE6HvQmh2AGnRLpJEjVP/ZYOtALVFSp+amZNu3e00suQ95kq8ez2PYELWEyoaC1ijs sXiw== X-Gm-Message-State: APjAAAWTghszfu4yai+gslycC/SmmyllYiAhl2m9B5Vy5zD/XijQUJNZ mNhCYskDjYzAGq//kQHZW/iD9068hkl8dbeJXT8QBfaOzlRu X-Google-Smtp-Source: APXvYqwDbWF0OcFG+AtB4VK/IhXRF/iFvUW6DNp79QQZpccJo6ws4f9KgHHNAixoqX9glLpj0ArmG1cZvD0A2bv4yBv33F2MQxAv MIME-Version: 1.0 X-Received: by 2002:a24:28d:: with SMTP id 135mr3743911itu.16.1555069573462; Fri, 12 Apr 2019 04:46:13 -0700 (PDT) Date: Fri, 12 Apr 2019 04:46:13 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008706a1058653d950@google.com> Subject: WARNING: proc registration bug in snd_info_register From: syzbot To: alsa-devel@alsa-project.org, andreyknvl@google.com, joe@perches.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, perex@perex.cz, syzkaller-bugs@googlegroups.com, tiwai@suse.com, vkoul@kernel.org 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: 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=1065d5bb200000 kernel config: https://syzkaller.appspot.com/x/.config?x=23e37f59d94ddd15 dashboard link: https://syzkaller.appspot.com/bug?extid=4d729bd9da724d0282dd compiler: gcc (GCC) 9.0.0 20181231 (experimental) 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+4d729bd9da724d0282dd@syzkaller.appspotmail.com usb 3-1: config 0 descriptor?? snd_usb_toneport 1-1:0.0: Line 6 POD Studio UX2 now attached usb 1-1: USB disconnect, device number 26 ------------[ cut here ]------------ proc_dir_entry 'asound/card4' already registered WARNING: CPU: 0 PID: 533 at fs/proc/generic.c:359 proc_register+0x3d9/0x550 fs/proc/generic.c:359 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 533 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 panic+0x29d/0x5f2 kernel/panic.c:214 __warn.cold+0x20/0x48 kernel/panic.c:571 report_bug+0x262/0x2a0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:179 [inline] fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0x130/0x1f0 arch/x86/kernel/traps.c:272 do_invalid_op+0x37/0x40 arch/x86/kernel/traps.c:291 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:proc_register+0x3d9/0x550 fs/proc/generic.c:359 Code: ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 61 01 00 00 48 8b 04 24 48 c7 c7 e0 a0 79 8e 48 8b b0 d0 00 00 00 e8 a7 9e 71 ff <0f> 0b 48 c7 c7 a0 90 91 91 e8 b9 10 34 0c 48 8b 4c 24 28 48 b8 00 RSP: 0018:ffff88809f59f018 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff88821443f0c0 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815b1e42 RDI: ffffed1013eb3df5 RBP: ffff8880a7b65780 R08: ffff88809f51c980 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff88808f034ab8 R15: 0000000000000005 proc_mkdir_data+0x17b/0x230 fs/proc/generic.c:475 __snd_info_register sound/core/info.c:814 [inline] snd_info_register+0x2f8/0x3e0 sound/core/info.c:854 create_subdir+0x69/0xa0 sound/core/info.c:458 snd_info_card_create+0xcf/0x230 sound/core/info.c:528 snd_card_new+0x61d/0x920 sound/core/init.c:255 snd_usb_audio_create sound/usb/card.c:475 [inline] usb_audio_probe+0x10d9/0x1fa0 sound/usb/card.c:621 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 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a bot. 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