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=-2.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 12E60CA9ED3 for ; Mon, 4 Nov 2019 07:27:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DD3CA218BA for ; Mon, 4 Nov 2019 07:27:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="YmewoW4x" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727756AbfKDH1Q (ORCPT ); Mon, 4 Nov 2019 02:27:16 -0500 Received: from mail-pf1-f194.google.com ([209.85.210.194]:37224 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726248AbfKDH1P (ORCPT ); Mon, 4 Nov 2019 02:27:15 -0500 Received: by mail-pf1-f194.google.com with SMTP id p24so5068135pfn.4; Sun, 03 Nov 2019 23:27:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=in-reply-to:to:cc:from:subject:message-id:date:user-agent :mime-version:content-transfer-encoding:content-language; bh=9lUG+HgyrxxP1bPMLu6biXo7ZKcS5tFln1/2jZCldLw=; b=YmewoW4xYNJBW+4+Z4J1JD+M6ymPFDiAXtKDvtBVqr/ZxBf2aWRrQ6xjeOnvV37kd1 VOrs0ZJmZCrXvD/m6bQPjnHvqMxokm53u7h1a2vAcY7Wb4Ulp0uf4vV3ybzHFo2oV9uX TlmDhRNH4jGyBbihY+uLTVf5queXhSNKIrT2XzfdIP0EV9f4ygt2/JFFvV5G1tDWTJIc e05a20eKhmVwK/0m6MK77GVCfo3Nd853R29ByE45AcTNvXSDj7qfMKbqZDR0Z33mXLAP WOVfRLdoA5V22faxLN6+7eAhMoRhkWdgFwNAXCe5Fc/ezakUFfvghPwdynQ6K65KBYZ+ 3A5A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:in-reply-to:to:cc:from:subject:message-id:date :user-agent:mime-version:content-transfer-encoding:content-language; bh=9lUG+HgyrxxP1bPMLu6biXo7ZKcS5tFln1/2jZCldLw=; b=bu2nwOxqAq7UgtjEqI3RXwT6uyPQviA+vxEHsCdVKNvfCz7AR2eOh0ZGoOFI0XSr8D UFAMt4aM7Q9M4XcrmHkjqzmEZCEqTDhWch0m4D+r0EESKqaLHprLs5zKvhZmYc1QHqx1 y5qiUiPz+NlnOELX6SIA5GK61joUdkbqIRsqYn49TwIb39VLEo8smYmqkvZVkj72Rq6c tyt4z95rbkKTH322TxltNLjnqWskjN8jfVbCVSWUNj7FEzgNFdoq/JdV28vTIRfHbJ86 UkXVHw67cNPG184DsXn6jw9wC8mXGoYOb0KOLnJFLx5MhwzUe50g8bQGWdmMU2JQvHC0 Akvg== X-Gm-Message-State: APjAAAVuiuyOnsnFwAgfcvo7pkdxn4p9Au939BlSTZaILKQCWOhcr18e 9wpG35uhwpN/BzkzKtRlFiY= X-Google-Smtp-Source: APXvYqwtUDlbYEwX08qyumOD83NMG+jN8pHXVMtOyasFYdr0MXZwnj2HF2EtdN61Pr9lvqZphtiXpg== X-Received: by 2002:a62:53:: with SMTP id 80mr30403822pfa.192.1572852433157; Sun, 03 Nov 2019 23:27:13 -0800 (PST) Received: from ?IPv6:2408:821b:3c17:2d0:8c54:276:fb3e:9667? ([2408:821b:3c17:2d0:8c54:276:fb3e:9667]) by smtp.gmail.com with ESMTPSA id v16sm6157644pje.1.2019.11.03.23.27.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 03 Nov 2019 23:27:12 -0800 (PST) In-Reply-To: <20190808160005.10325-6-hch@lst.de> To: hch@lst.de Cc: linux-xtensa@linux-xtensa.org, monstr@monstr.eu, vladimir.murzin@arm.com, linux-parisc@vger.kernel.org, linux-sh@vger.kernel.org, tiwai@suse.de, linuxppc-dev@lists.ozlabs.org, deller@gmx.de, x86@kernel.org, linux-kernel@vger.kernel.org, gregkh@google.com From: youling257 Subject: Re: ALSA: pcm: use dma_can_mmap() to check if a device supports dma_mmap_* Message-ID: <9e41aba3-c8ba-1d54-d693-fb822c58925f@gmail.com> Date: Mon, 4 Nov 2019 15:26:53 +0800 User-Agent: Mozilla/5.0 (X11; Linux i686; rv:68.0) Gecko/20100101 Thunderbird/68.2.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch cause oops on android mainline kernel about gadget audio_source. Androidx86 run on android mainline kernel. [ 385.104963] android_work: sent uevent USB_STATE=CONNECTED [ 385.109006] android_work: sent uevent USB_STATE=DISCONNECTED [ 385.182024] android_work: sent uevent USB_STATE=CONNECTED [ 385.184737] configfs-gadget gadget: high-speed config #1: b [ 385.184921] android_work: sent uevent USB_STATE=CONFIGURED [ 385.285268] BUG: kernel NULL pointer dereference, address: 0000000000000220 [ 385.285339] #PF: supervisor read access in kernel mode [ 385.285374] #PF: error_code(0x0000) - not-present page [ 385.285436] PGD 80000000791e6067 P4D 80000000791e6067 PUD 0 [ 385.285473] Oops: 0000 [#1] PREEMPT SMP PTI [ 385.285509] CPU: 0 PID: 5780 Comm: Binder:1383_5 Tainted: G O 5.4.0-rc6-android-x86_64+ #1 [ 385.285571] Hardware name: Insyde ONDA Tablet/ONDA Tablet, BIOS ONDA.D890HBBNR0A 03/11/2015 [ 385.285639] RIP: 0010:dma_can_mmap+0x5/0x30 [ 385.285675] Code: 74 11 e9 ae 98 b2 00 48 8b 05 9f 40 94 01 48 85 c0 75 e3 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1f 44 00 00 <48> 8b 87 20 02 00 00 48 85 c0 74 09 48 83 78 10 00 0f 95 c0 c3 48 [ 385.285762] RSP: 0018:ffffb39443b63b78 EFLAGS: 00010246 [ 385.285797] RAX: 0000000000000001 RBX: ffffa28b91756600 RCX: 0000000000000040 [ 385.285857] RDX: ffffffffb62b2a00 RSI: 0000000000000000 RDI: 0000000000000000 [ 385.285917] RBP: ffffa28bac69f800 R08: ffffffffb63141b0 R09: ffffa28bf9a34a88 [ 385.285952] R10: ffffffffb62b2be0 R11: ffffffffb62b2bd0 R12: 0000000000000008 [ 385.286013] R13: 0000000000000000 R14: ffffa28bacd736a8 R15: ffffa28bacd736c8 [ 385.286076] FS: 0000000000000000(0000) GS:ffffa28bfb600000(0063) knlGS:00000000f5d81970 [ 385.286110] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 385.286171] CR2: 0000000000000220 CR3: 000000007b2f6000 CR4: 00000000001006f0 [ 385.286232] Call Trace: [ 385.286275] snd_pcm_hw_constraints_complete+0x3e/0x1f0 [ 385.286314] snd_pcm_open_substream+0x94/0x140 [ 385.286377] snd_pcm_open+0xf0/0x240 [ 385.286416] ? wake_up_q+0x60/0x60 [ 385.286460] snd_pcm_playback_open+0x3d/0x60 [ 385.286533] chrdev_open+0xa2/0x1c0 [ 385.286574] ? cdev_put.part.0+0x20/0x20 [ 385.286615] do_dentry_open+0x13a/0x380 [ 385.286686] path_openat+0x588/0x15d0 [ 385.286728] do_filp_open+0x91/0x100 [ 385.286769] ? __check_object_size+0x136/0x147 [ 385.286840] do_sys_open+0x184/0x280 [ 385.286880] ? handle_mm_fault+0xd7/0x1c0 [ 385.286920] do_fast_syscall_32+0x8e/0x250 [ 385.286992] entry_SYSENTER_compat+0x7c/0x8e [ 385.287302] CR2: 0000000000000220 [ 385.287391] ---[ end trace 73ffcefcbbe2b9a0 ]--- [ 385.296269] RIP: 0010:dma_can_mmap+0x5/0x30 [ 385.296337] Code: 74 11 e9 ae 98 b2 00 48 8b 05 9f 40 94 01 48 85 c0 75 e3 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1f 44 00 00 <48> 8b 87 20 02 00 00 48 85 c0 74 09 48 83 78 10 00 0f 95 c0 c3 48 [ 385.296407] RSP: 0018:ffffb39443b63b78 EFLAGS: 00010246 [ 385.296477] RAX: 0000000000000001 RBX: ffffa28b91756600 RCX: 0000000000000040 [ 385.296516] RDX: ffffffffb62b2a00 RSI: 0000000000000000 RDI: 0000000000000000 [ 385.296584] RBP: ffffa28bac69f800 R08: ffffffffb63141b0 R09: ffffa28bf9a34a88 [ 385.296654] R10: ffffffffb62b2be0 R11: ffffffffb62b2bd0 R12: 0000000000000008 [ 385.296693] R13: 0000000000000000 R14: ffffa28bacd736a8 R15: ffffa28bacd736c8 [ 385.296761] FS: 0000000000000000(0000) GS:ffffa28bfb600000(0063) knlGS:00000000f5d81970 [ 385.296830] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 385.296867] CR2: 0000000000000220 CR3: 000000007b2f6000 CR4: 00000000001006f0 [ 385.296936] Kernel panic - not syncing: Fatal exception [ 385.296985] Kernel Offset: 0x33e00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 385.305185] Rebooting in 5 seconds.. Revert it no the oops.