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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 39687C433DF for ; Thu, 11 Jun 2020 06:58:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 09C9D2085B for ; Thu, 11 Jun 2020 06:58:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591858697; bh=0LbPkXRKmQkzn1hd+4rIfvZFetgQ3Peh+JzAEL1lQps=; h=Date:From:To:cc:Subject:In-Reply-To:References:List-ID:From; b=ltG8jgTVKrkSYOAuewpRhOQytZ4o04i22P4+SDLy618ZeH2O3Ph9zurw+vg6ZUinc kWAmkW6n8VwyfQllYlohOpNyKkbu28ENSE+2bT37HKMggTAp/sFLB//1vhYcK00mXo X4KXCeD63H1UGW5MnxXdphN2l5HQf/fE8PYjCIQs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726570AbgFKG6M (ORCPT ); Thu, 11 Jun 2020 02:58:12 -0400 Received: from mail.kernel.org ([198.145.29.99]:46068 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726526AbgFKG6M (ORCPT ); Thu, 11 Jun 2020 02:58:12 -0400 Received: from pobox.suse.cz (nat1.prg.suse.com [195.250.132.148]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 715312072F; Thu, 11 Jun 2020 06:58:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591858691; bh=0LbPkXRKmQkzn1hd+4rIfvZFetgQ3Peh+JzAEL1lQps=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=O3qs0YGIPTZOCVvYK09B38ZLCrvyQXfhFPkNIj9EONJrb4gx4y/3C82XzGAUvROYX UKxLQBKEIYP8vHde8UwgJibJwfxGpIe4e6Ur2/8Oo2nnUTNxnCKvsMBrbA0Q3YwQcr CpIZk4jcSbcafBckOgnl0MEO3t7egdQMUgLhllBU= Date: Thu, 11 Jun 2020 08:58:06 +0200 (CEST) From: Jiri Kosina To: Peter Hutterer cc: Andrey Konovalov , syzbot , Benjamin Tissoires , "open list:HID CORE LAYER" , LKML , Dmitry Torokhov , amir73il@gmail.com, Felipe Balbi , "David S. Miller" , Greg Kroah-Hartman , Jan Kara , kuba@kernel.org, linux-fsdevel@vger.kernel.org, mathew.j.martineau@linux.intel.com, matthieu.baerts@tessares.net, mptcp@lists.01.org, netdev , syzkaller-bugs Subject: Re: INFO: task hung in corrupted (2) In-Reply-To: <20200611045118.GA306934@jelly> Message-ID: References: <0000000000004afcae05a7041e98@google.com> <20200611045118.GA306934@jelly> User-Agent: Alpine 2.21 (LSU 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Thu, 11 Jun 2020, Peter Hutterer wrote: > based on the line numbers it's the while loop in there which is also the one > that could be unbounded if the hid collection isn't set up correctly or if > we have some other corruption happening. Given the fact this is syzkaller-induced, it's almost certainly a completely bogus collection. So we are surely missing sanity check that there exists a collection with idx -1. > Need to page this back in to figure out what could be happening here. Thanks, -- Jiri Kosina SUSE Labs