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 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 50059C04AA6 for ; Tue, 30 Apr 2019 18:56:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2A6E920854 for ; Tue, 30 Apr 2019 18:56:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727002AbfD3S4C (ORCPT ); Tue, 30 Apr 2019 14:56:02 -0400 Received: from mail-it1-f197.google.com ([209.85.166.197]:52167 "EHLO mail-it1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726006AbfD3S4B (ORCPT ); Tue, 30 Apr 2019 14:56:01 -0400 Received: by mail-it1-f197.google.com with SMTP id f196so3213760itf.1 for ; Tue, 30 Apr 2019 11:56:01 -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=UtSb1a/TJthhtHAsE2xIU1UcdO20j/xmJynrN5M57B0=; b=TGHMiW/xI3S9vR8qLqb51VON8mMW6cr+gdK1QfPLFw4P1lb/vEheZxX6n5nQ4y6Skp ziJ6yoJFLOAwhozxzULUg+aitIYLUjoejBicrukDZq6rZNdUwshrsGq6rgT30MeUPjNN zN1vWyJJJq4HKKAYP5yCt137Hm4Rtbex4Sr5jAuzePQN3ypSs/kxV35wMv+Os+hriTkS y6xg1YSxjc3o9J56yNh8jnqyD3DEAKjE8s/h+Smy9WcX0I2bPWVAFTD4dc8hQHkVRDJJ 84iGj2vL7G7en9Kro9FKi0O0FBSUrojXcO/RwP98K6xEW5eh72AexWoAFP4LMIo7aj3/ vohA== X-Gm-Message-State: APjAAAWhxzivPlHgNYv77ugwgyyZ8w5oU7xqaF47Osd6hSo8bIbSzuzr wwtjtFwqcOORPHU3VNtuySD1hzGVdaisXL2U8n2IbBNo0xSz X-Google-Smtp-Source: APXvYqwHvUBz+VBVOZvzKN5My0ZNXMUGaoF2CpR9bkkDq95ayJFiBomkFo2QHi9PD2HRCKhbKQd56XmVsTaJalFSTmpkS3E3RkDE MIME-Version: 1.0 X-Received: by 2002:a24:6987:: with SMTP id e129mr4985371itc.28.1556650560822; Tue, 30 Apr 2019 11:56:00 -0700 (PDT) Date: Tue, 30 Apr 2019 11:56:00 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b7a84a0587c3f3e5@google.com> Subject: Re: WARNING: Detected a wedged cx25840 chip; the device will not work. 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"; 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 has tested the proposed patch but the reproducer still triggered crash: WARNING in sysfs_remove_group pvrusb2: Attached sub-driver tuner pvrusb2: ***WARNING*** pvrusb2 driver initialization failed due to the failure of one or more sub-device kernel modules. pvrusb2: You need to resolve the failing condition before this driver can function. There should be some earlier messages giving more information about the problem. ------------[ cut here ]------------ sysfs group 'power' not found for kobject '0-0044' WARNING: CPU: 1 PID: 586 at fs/sysfs/group.c:254 sysfs_remove_group fs/sysfs/group.c:254 [inline] WARNING: CPU: 1 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: 1 PID: 586 Comm: pvrusb2-context Not tainted 5.1.0-rc3-g43151d6-dirty #1 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:ffff88809ced7b70 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffffff8f037e80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815b2132 RDI: ffffed10139daf60 RBP: 0000000000000000 R08: ffff88809ce96200 R09: ffffed1015a23edb R10: ffffed1015a23eda R11: ffff8880ad11f6d7 R12: ffff888218b8e630 R13: ffffffff8f038520 R14: 1ffff110139daf97 R15: ffff888218b8e628 dpm_sysfs_remove+0xa2/0xc0 drivers/base/power/sysfs.c:737 device_del+0x175/0xb90 drivers/base/core.c:2246 usb 4-1: new high-speed USB device number 3 using dummy_hcd 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 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.. 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=15433634a00000 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=13df3d24a00000