Received: by 2002:a25:683:0:0:0:0:0 with SMTP id 125csp1082749ybg; Thu, 11 Jun 2020 00:00:22 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyLcS8juoVyyJVaNwrefMkrqOG557zeRmqQJrYC3n7zqxUTgGmZ9NRAYEVQQZInFWJQQaaj X-Received: by 2002:a17:906:4944:: with SMTP id f4mr6981958ejt.3.1591858822496; Thu, 11 Jun 2020 00:00:22 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1591858822; cv=none; d=google.com; s=arc-20160816; b=YV7roFoE6Zkya/rkAnrSx2EwltwzDGedcmhmI8CpbmL4oGUDMdKXfxdqIrrNPNpHvJ BC+YduqUCK+6Jo4Cx16wHK0N56EdDVyrBVC5TgTXh22pQyPUkx6afH85Pd7qvoxST2xH nFEjyVmeca1l5f6sLq6nI9vHCSve2vOihNuOzUAKU6Fs8JQUouWwAqB3X/rHm40/6uIP vbskDaFmLHccS4jFCw7a7HuS3GNtnqXuIuRVzUglXuYSNLFh3LM9Wc1KGVKtJgXtYU32 1MrUmfUomylnFIxhkDy3gnQ/DhDhYvqiv/MJ0faZiUU32URrBEWM5GziadPEMwcqxfG9 +Ozw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:user-agent:references :message-id:in-reply-to:subject:cc:to:from:date:dkim-signature; bh=kEu1i1i+788z0ilhbrZnCJuQG4TGzGOGpAB+mMUoNNE=; b=WILU9QdnPpDTnLYOdxUcjr+Dx1U8I4VccrCGZqO4rMMM1pGkrTYwqin3KnZg4q2UvA Uk+ia3d+lLwzUDjO1P5J27OwzA9GRUJKIH+BNa5pLKyO1wIvU1mnpTq8W0I/czvMyd41 gj3HhXxbBCDDQSA2ELjOWr7oPzarLeX7bcMZtzZ16wwBSUGiiWPPG2jdQqeGvjdmRn1y 0/mf9ELjYMherFAQ8bHFqdRtJ65sRUI37VNvkAdoscC2z8Pe3BcA86ws/vIfAUW/i6BY 9aJP5IeYYDBVxMmKGjlrBnIPs6acTHh65RiFDig+4X5FoOqKsdcyw/0SNfhSCTSoEJNG h51w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=O3qs0YGI; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id o13si1397815ejd.523.2020.06.10.23.59.57; Thu, 11 Jun 2020 00:00:22 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=O3qs0YGI; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726603AbgFKG6M (ORCPT + 99 others); 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-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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