From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-f69.google.com (mail-oi0-f69.google.com [209.85.218.69]) by kanga.kvack.org (Postfix) with ESMTP id 1AEC36B027E for ; Mon, 8 Jan 2018 00:22:29 -0500 (EST) Received: by mail-oi0-f69.google.com with SMTP id w196so5344473oia.17 for ; Sun, 07 Jan 2018 21:22:29 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id p67si2880384oia.165.2018.01.07.21.22.27 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 07 Jan 2018 21:22:27 -0800 (PST) Date: Sun, 7 Jan 2018 23:22:25 -0600 From: Pete Zaitcev Subject: Re: kernel BUG at ./include/linux/mm.h:LINE! (3) Message-ID: <20180107232225.3b6a37ca@lembas.zaitcev.lan> In-Reply-To: <20171229132420.jn2pwabl6pyjo6mk@node.shutemov.name> References: <20171228160346.6406d52df0d9afe8cf7a0862@linux-foundation.org> <20171229132420.jn2pwabl6pyjo6mk@node.shutemov.name> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "Kirill A. Shutemov" Cc: Andrew Morton , Greg Kroah-Hartman , linux-mm@kvack.org, linux-usb@vger.kernel.org, zaitcev@redhat.com On Fri, 29 Dec 2017 16:24:20 +0300 "Kirill A. Shutemov" wrote: > Looks like MON_IOCT_RING_SIZE reallocates ring buffer without any > serialization wrt mon_bin_vma_fault(). By the time of get_page() the page > may be freed. As an update: I tried to make a smaller test for this, but was unsuccessful so far. I'll poke a bit at it later, but it may take me some time. -- Pete -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org