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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 3976AC433DB for ; Wed, 10 Feb 2021 16:05:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EA4E064E08 for ; Wed, 10 Feb 2021 16:05:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232012AbhBJQFH (ORCPT ); Wed, 10 Feb 2021 11:05:07 -0500 Received: from mail.efficios.com ([167.114.26.124]:40234 "EHLO mail.efficios.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229789AbhBJQFB (ORCPT ); Wed, 10 Feb 2021 11:05:01 -0500 Received: from localhost (localhost [127.0.0.1]) by mail.efficios.com (Postfix) with ESMTP id D95B32FD1BE; Wed, 10 Feb 2021 11:04:19 -0500 (EST) Received: from mail.efficios.com ([127.0.0.1]) by localhost (mail03.efficios.com [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id eLTiJ4R0sY9Z; Wed, 10 Feb 2021 11:04:19 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mail.efficios.com (Postfix) with ESMTP id 83EDD2FD602; Wed, 10 Feb 2021 11:04:19 -0500 (EST) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.efficios.com 83EDD2FD602 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=efficios.com; s=default; t=1612973059; bh=+UBxwqbweM8A4Z+cPBFhpP7uEXxPrvJF/TprvOtzmiQ=; h=Date:From:To:Message-ID:MIME-Version; b=CDh9rPPiWjTvcCAs2MU6LC/2zjxtSYl2lCDVBHuQ6pnvud/NBBj6QRoGlNxvVxj3T 6ElF5NaB8q24BCuTWtpIMWS8Y7kMzT0a6ipV0cG74DBNhFOuF7aNSrtxwmJ++TkkAE 16rF28KymIepHCQy2N9DiXwhncLiWsXYjVpX9uBAwPkHl22EfSDEysYprIwPt2iFtr qfmrV4IqjqkonR8laUeq7kM/ZATUdNPtstmLzoI0AW4ScAaHEtHB0+l0SO79yTfcHx bFO9g5txLdABF2E5FEzvw85BMb1NPPZnnkED7i0nfJI2s3QmLdyox9lXy9x9yjYCwp W821/BPnbHHlg== X-Virus-Scanned: amavisd-new at efficios.com Received: from mail.efficios.com ([127.0.0.1]) by localhost (mail03.efficios.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 17KkZ-M1c7Xo; Wed, 10 Feb 2021 11:04:19 -0500 (EST) Received: from mail03.efficios.com (mail03.efficios.com [167.114.26.124]) by mail.efficios.com (Postfix) with ESMTP id 741DB2FD328; Wed, 10 Feb 2021 11:04:19 -0500 (EST) Date: Wed, 10 Feb 2021 11:04:19 -0500 (EST) From: Mathieu Desnoyers To: stable Cc: Theodore Ts'o , linux-kernel , Chris Mason , Tejun Heo , Jens Axboe , rostedt , Michael Jeanson Message-ID: <537870616.15400.1612973059419.JavaMail.zimbra@efficios.com> Subject: [stable 4.4, 4.9, 4.14, 4.19 LTS] Missing fix "memcg: fix a crash in wb_workfn when a device disappears" MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [167.114.26.124] X-Mailer: Zimbra 8.8.15_GA_3996 (ZimbraWebClient - FF85 (Linux)/8.8.15_GA_3996) Thread-Index: 4Jv7RqCdiKag+0YuCj6QoeuUQYax/Q== Thread-Topic: Missing fix "memcg: fix a crash in wb_workfn when a device disappears" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, While reconciling the lttng-modules writeback instrumentation with its counterpart within the upstream Linux kernel, I notice that the following commit introduced in 5.6 is present in stable branches 5.4 and 5.5, but is missing from LTS stable branches for 4.4, 4.9, 4.14, 4.19: commit 68f23b89067fdf187763e75a56087550624fdbee ("memcg: fix a crash in wb_workfn when a device disappears") Considering that this fix was CC'd to the stable mailing list, is there any reason why it has not been integrated into those LTS branches ? Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com