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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0867C433FE for ; Tue, 4 Jan 2022 18:18:29 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 16AAA6B0071; Tue, 4 Jan 2022 13:18:29 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 11AA16B0072; Tue, 4 Jan 2022 13:18:29 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 030906B0073; Tue, 4 Jan 2022 13:18:28 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id EACFB6B0071 for ; Tue, 4 Jan 2022 13:18:28 -0500 (EST) Received: from smtpin11.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id A3B2E8249980 for ; Tue, 4 Jan 2022 18:18:28 +0000 (UTC) X-FDA: 78993414696.11.BD290F7 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf18.hostedemail.com (Postfix) with ESMTP id 7F2E21C000E for ; Tue, 4 Jan 2022 18:18:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=DAujSD94+bcpvVfOH5dd0ERdar8XqXZUWBgG9F0szd8=; b=lQPAmUlZETyrTfueH6E6Tf4/Sm Gkt4M3OY0aH7F0dC22T5VC3xCcgIY/DD2ohmddm22Ctf9zEvdyFHQA74BxeOHlc5gh4eK9i3TlvKi th5njhTch4HHwzqHwkxReEJ9emm7r2QBntc1YpKz7hKzA1OGp57aQZl9/C/2946cwMXjaG6WkATAg 9vVV+3OJhlW+EtYNuIwsZY6DjcP+fL1s3bvzqaJpGpdgrjojVikKFMK6iF9WwdyJ5rHGs5m9rrs/j JQ59u60EePfOptkYe4V3b/BNu02AzqNiOhxEl4OByoTtO2QzvhflrBc1hmeJRbsxOIppnBA8teMOz tC9sky3Q==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1n4oO7-00DtIS-9w; Tue, 04 Jan 2022 18:18:23 +0000 Date: Tue, 4 Jan 2022 18:18:23 +0000 From: Matthew Wilcox To: kvartet Cc: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, sunhao.th@gmail.com Subject: Re: INFO: task hung in __filemap_get_folio Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 7F2E21C000E X-Stat-Signature: hn36h9bthmk96be11jmay4nt83kqh7ww Authentication-Results: imf18.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=lQPAmUlZ; dmarc=none; spf=none (imf18.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org X-Rspamd-Server: rspam02 X-HE-Tag: 1641320296-320177 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Jan 04, 2022 at 07:44:10PM +0800, kvartet wrote: > Hello, > > When using Syzkaller to fuzz the latest Linux kernel, the following > crash was triggered. This isn't a crash, it's a notification of a hang. More than likely syzbot is playing with RT scheduling again. We do not need more people running syzbot. We need more people tracking down and fixing the syzbot reports that already exist.