From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: WARNING: Support for this device (Terratec Grabster AV400) is experimental. From: syzbot Message-Id: <0000000000006b0d230587c32bf2@google.com> Date: Tue, 30 Apr 2019 11:00:00 -0700 To: andreyknvl@google.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com List-ID: SGVsbG8sCgpzeXpib3QgaGFzIHRlc3RlZCB0aGUgcHJvcG9zZWQgcGF0Y2ggYnV0IHRoZSByZXBy b2R1Y2VyIHN0aWxsIHRyaWdnZXJlZCAgCmNyYXNoOgpXQVJOSU5HIGluIHN5c2ZzX3JlbW92ZV9n cm91cAoKcHZydXNiMjogSW1wb3J0YW50IGZ1bmN0aW9uYWxpdHkgbWlnaHQgbm90IGJlIGVudGly ZWx5IHdvcmtpbmcuCnB2cnVzYjI6IFBsZWFzZSBjb25zaWRlciBjb250YWN0aW5nIHRoZSBkcml2 ZXIgYXV0aG9yIHRvIGhlbHAgd2l0aCBmdXJ0aGVyICAKc3RhYmlsaXphdGlvbiBvZiB0aGUgZHJp dmVyLgotLS0tLS0tLS0tLS1bIGN1dCBoZXJlIF0tLS0tLS0tLS0tLS0KcHZydXNiMjogKioqKioq KioqKgpzeXNmcyBncm91cCAncG93ZXInIG5vdCBmb3VuZCBmb3Iga29iamVjdCAnMC0wMDQ0JwpX QVJOSU5HOiBDUFU6IDAgUElEOiA1ODYgYXQgZnMvc3lzZnMvZ3JvdXAuYzoyNTQgc3lzZnNfcmVt b3ZlX2dyb3VwICAKZnMvc3lzZnMvZ3JvdXAuYzoyNTQgW2lubGluZV0KV0FSTklORzogQ1BVOiAw IFBJRDogNTg2IGF0IGZzL3N5c2ZzL2dyb3VwLmM6MjU0ICAKc3lzZnNfcmVtb3ZlX2dyb3VwKzB4 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eD0xMWU0NjdhOGEwMDAwMAprZXJuZWwgY29uZmlnOiAgaHR0cHM6Ly9zeXprYWxsZXIuYXBwc3Bv dC5jb20veC8uY29uZmlnP3g9Mjc0YWFkMGNmOTY2YzNiYwpjb21waWxlcjogICAgICAgZ2NjIChH Q0MpIDkuMC4wIDIwMTgxMjMxIChleHBlcmltZW50YWwpCnBhdGNoOiAgICAgICAgICBodHRwczov L3N5emthbGxlci5hcHBzcG90LmNvbS94L3BhdGNoLmRpZmY/eD0xNDc5YTRiOGEwMDAwMAo= 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=-5.6 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, 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 AC165C04AA8 for ; Tue, 30 Apr 2019 18:00:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8836721670 for ; Tue, 30 Apr 2019 18:00:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726912AbfD3SAB (ORCPT ); Tue, 30 Apr 2019 14:00:01 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:56077 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726017AbfD3SAB (ORCPT ); Tue, 30 Apr 2019 14:00:01 -0400 Received: by mail-io1-f70.google.com with SMTP id y5so11955515ioc.22 for ; Tue, 30 Apr 2019 11:00:00 -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:in-reply-to:message-id:subject :from:to; bh=i1hNmIlzVNTyKhhowyG+Xc4x0UuOGxlZW8Ho3IlyYRI=; b=XZ9tmA50H2mqoiI5VLYRQ0PiE/sbs49eC5GBenL1JctFGe0CbbXThD0psUHWJ5NFrq Eu5rV9vPEbfhNnA3Mn1ebjXp0kyVuHMKcc6z4Nk2EFJJHtdrTVuK23d/KT8m9Utdj2v3 FSPLIp3CcrEtqutFuJi7NeFhdZkaJ2sX9ay+tzMhQHFgEsqhzpAi82S7BXL/v8c98afN V3HytdSiXWjEYJ+7FpmFacRtww9ApV35m0l7FpRN+dRH5DNdl9ua2GyETgtO/Gik9y9f 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From: syzbot To: andreyknvl@google.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; delsp="yes"; format="flowed" Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Message-ID: <20190430180000.Fhz4MIYnLBHQHZz827U0aulVjwcsUCe6unXdd-KVJGA@z> Hello, syzbot has tested the proposed patch but the reproducer still triggered crash: WARNING in sysfs_remove_group pvrusb2: Important functionality might not be entirely working. pvrusb2: Please consider contacting the driver author to help with further stabilization of the driver. ------------[ cut here ]------------ pvrusb2: ********** sysfs group 'power' not found for kobject '0-0044' WARNING: CPU: 0 PID: 586 at fs/sysfs/group.c:254 sysfs_remove_group fs/sysfs/group.c:254 [inline] WARNING: CPU: 0 PID: 586 at fs/sysfs/group.c:254 sysfs_remove_group+0x15a/0x1b0 fs/sysfs/group.c:245 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 586 Comm: pvrusb2-context Not tainted 5.1.0-rc3-g43151d6-dirty #1 usb 5-1: New USB device found, idVendor=0ccd, idProduct=0039, bcdDevice= d.3c Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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:sysfs_remove_group fs/sysfs/group.c:254 [inline] RIP: 0010:sysfs_remove_group+0x15a/0x1b0 fs/sysfs/group.c:245 Code: 48 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 41 48 8b 33 48 c7 c7 a0 31 7a 8e e8 e6 c2 6e ff <0f> 0b eb 95 e8 0d de d3 ff e9 d2 fe ff ff 48 89 df e8 00 de d3 ff RSP: 0018:ffff88809cc9fb70 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffffff8f037e80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815b2132 RDI: ffffed1013993f60 RBP: 0000000000000000 R08: ffff88809cc93100 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888097d06eb0 R13: ffffffff8f038520 R14: 1ffff11013993f97 R15: ffff888097d06ea8 dpm_sysfs_remove+0xa2/0xc0 drivers/base/power/sysfs.c:737 device_del+0x175/0xb90 drivers/base/core.c:2246 device_unregister+0x27/0xd0 drivers/base/core.c:2301 i2c_unregister_device drivers/i2c/i2c-core-base.c:814 [inline] __unregister_client drivers/i2c/i2c-core-base.c:1422 [inline] __unregister_client+0x7d/0x90 drivers/i2c/i2c-core-base.c:1418 device_for_each_child+0x100/0x170 drivers/base/core.c:2401 i2c_del_adapter drivers/i2c/i2c-core-base.c:1485 [inline] i2c_del_adapter+0x35b/0x640 drivers/i2c/i2c-core-base.c:1447 pvr2_i2c_core_done+0x6e/0xbb drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c:662 pvr2_hdw_destroy+0x17e/0x380 drivers/media/usb/pvrusb2/pvrusb2-hdw.c:2669 pvr2_context_destroy+0x89/0x240 drivers/media/usb/pvrusb2/pvrusb2-context.c:79 pvr2_context_check drivers/media/usb/pvrusb2/pvrusb2-context.c:146 [inline] pvr2_context_thread_func+0x65e/0x870 drivers/media/usb/pvrusb2/pvrusb2-context.c:167 usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 kthread+0x313/0x420 kernel/kthread.c:253 usb 3-1: New USB device found, idVendor=0ccd, idProduct=0039, bcdDevice= d.3c ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds.. Tested on: commit: 43151d6c usb-fuzzer: main usb gadget fuzzer driver git tree: https://github.com/google/kasan.git usb-fuzzer console output: https://syzkaller.appspot.com/x/log.txt?x=11e467a8a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=274aad0cf966c3bc compiler: gcc (GCC) 9.0.0 20181231 (experimental) patch: https://syzkaller.appspot.com/x/patch.diff?x=1479a4b8a00000