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_MUTT autolearn=unavailable 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 180A2C48BEA for ; Mon, 24 Jun 2019 20:21:55 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B64E720673 for ; Mon, 24 Jun 2019 20:21:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="2VPaEOiY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B64E720673 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2D35B6B0005; Mon, 24 Jun 2019 16:21:54 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 283E58E0003; Mon, 24 Jun 2019 16:21:54 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 14C578E0002; Mon, 24 Jun 2019 16:21:54 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-pg1-f200.google.com (mail-pg1-f200.google.com [209.85.215.200]) by kanga.kvack.org (Postfix) with ESMTP id CF96D6B0005 for ; Mon, 24 Jun 2019 16:21:53 -0400 (EDT) Received: by mail-pg1-f200.google.com with SMTP id i11so7205685pgt.7 for ; Mon, 24 Jun 2019 13:21:53 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:date:from:to:cc:subject :message-id:references:mime-version:content-disposition:in-reply-to :user-agent; bh=/rV1TlvYuXOK2sFci2/p6W21rW/APz4/kUsj3EobUV4=; b=k2lGQHNBhaUeFHoJ01qDMtPSrEwpCxE+ixOC3UlD3rxv6bSPfUC7D9EOV3l2iwCGcn 7Q+pFG0Mdk9zJ/DN6tuCuyZdQCmr4d5mCYyL4t79fuQCM1uAoG/6oqb53FSj6q8DnwQZ Z6+E9t87A69VgWsqRgMXGLJdy3S3Oqozl8C2tbHGe7AFs4dHJNe6bS63+GAA9BqjIjnC jsqaF1nv0J0t3c1lFeo+gvLgPXNn3aoU7SAVLJLziMSOQxsNK5r4Cy1UmvcVVoaT7OPd 4mHMvsuGfkcd78IbFUDGTX553VrEZdFCDLIdsoEp8bXJigw2gH7s4dCusL69AOuC+AwQ FFLg== X-Gm-Message-State: APjAAAWAF78UxxX4hIddlT5xCGxmQQ8QtS3DuxwfBe7hPsYhhUf4uCzy nsGFZPAg1/uPAcLnjCx5oTCpZSRjeSeF6eqklHSIpyyXQpRFpSHK0krW7SfRDEXpovBVTddSK99 BeSkL/C8iHvQC0Ho4koCLpfbD7EuPweNkF/zL+sXPUhBYvIRC4gdicHZiT5SdbwS/Dg== X-Received: by 2002:a17:902:246:: with SMTP id 64mr77804980plc.311.1561407713291; Mon, 24 Jun 2019 13:21:53 -0700 (PDT) X-Google-Smtp-Source: APXvYqy9HrI8EcEwgDAWIE+KfmjvAvWfmuSNtWh7GnKkmafellFbwGwAWj530xIj3BO0pPHkrNG7 X-Received: by 2002:a17:902:246:: with SMTP id 64mr77804916plc.311.1561407712466; Mon, 24 Jun 2019 13:21:52 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1561407712; cv=none; d=google.com; s=arc-20160816; b=HAWO6r4fdY+d2PuaJGk3sitpZDHwueubHJDuJ1yh28qdXDN4t+K/IXmA0b/mfHiV0C OHiJjSiIkPzA+b0UMsvNZOofy0h1Zwc6g/rAeNsjh9aItqL6IUAwdsz9ZMOZVbXtGA2D xmod1nmBch3hDGgUm5esDbTiX0+ZBCTYF/nN/T7OIZRCH40We4avdfBd/eFPp1hAzYrx kLaxeyLGHMj9PrUJOG3UGLt4fOVtJnXeHctp4Zjp6dzrt6qMTafUcWzrU5OP+pDLiqOY GmRyQN4MITLTTCR5cqNw3zvxleX7LtubZQFwryzQll9vMYTRTZu3afpg8jQ5ZOdNVOMq C3wg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date:dkim-signature; bh=/rV1TlvYuXOK2sFci2/p6W21rW/APz4/kUsj3EobUV4=; b=glwmdAG2Vp1DHqe+KxVgkOPfwEd1m/96M9+8s434Z5xHxXx5OlIXfH4g6/2nGEGE5u C54RxmpJjPoPUYRszfa63MMP5QH8fkAt+T76htnjf02M59pM/2/Syz/cigwqUF6NRWMA aS6YGOVX1HhLD2Gv+wxk3LMSlBpg7P/LozD1aPLYlwXX3gPMecIrHBHRtav1w51J9Pdb wa2P+TQqB+gLNBQHkYSmGHmyzma6wowCPumuHWrWO/Tqh89rODzD10q4dyF5ENd47iTN Uzip9F134oSP+Vwe/ddqd0uOVV1NLXEpn2HiyzEHGIbWGP6L6/Q8y7Miwy6wFD14RC4P O4VQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=2VPaEOiY; spf=pass (google.com: domain of sashal@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=sashal@kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from mail.kernel.org (mail.kernel.org. [198.145.29.99]) by mx.google.com with ESMTPS id b5si11218646pfi.205.2019.06.24.13.21.52 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 24 Jun 2019 13:21:52 -0700 (PDT) Received-SPF: pass (google.com: domain of sashal@kernel.org designates 198.145.29.99 as permitted sender) client-ip=198.145.29.99; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=2VPaEOiY; spf=pass (google.com: domain of sashal@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=sashal@kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from localhost (unknown [167.220.24.221]) (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 6755E20645; Mon, 24 Jun 2019 20:21:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561407711; bh=/rV1TlvYuXOK2sFci2/p6W21rW/APz4/kUsj3EobUV4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=2VPaEOiYLx/B1U7xl+3URPJW/PCnea+Hoo4lmR8kq/6n244//CX5FcosNOr1Dj3oq kZ/WOwKR+mt0aTbDmzXkGDY61uNn7Pw8n0E1ZmPY1FmKSwRlrgS69rOqWLgsC9nNQT I7qwRnBg2lc/TFX9Q7IzCpvfO5IQUktLdI8ucdSE= Date: Mon, 24 Jun 2019 16:21:50 -0400 From: Sasha Levin To: Ajay Kaher Cc: aarcange@redhat.com, jannh@google.com, oleg@redhat.com, peterx@redhat.com, rppt@linux.ibm.com, jgg@mellanox.com, mhocko@suse.com, jglisse@redhat.com, akpm@linux-foundation.org, mike.kravetz@oracle.com, viro@zeniv.linux.org.uk, riandrews@android.com, arve@android.com, yishaih@mellanox.com, dledford@redhat.com, sean.hefty@intel.com, hal.rosenstock@gmail.com, matanb@mellanox.com, leonro@mellanox.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, devel@driverdev.osuosl.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, srivatsab@vmware.com, amakhalov@vmware.com Subject: Re: [PATCH v4 0/3] [v4.9.y] coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping Message-ID: <20190624202150.GC3881@sasha-vm> References: <1561410186-3919-1-git-send-email-akaher@vmware.com> <1561410186-3919-4-git-send-email-akaher@vmware.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <1561410186-3919-4-git-send-email-akaher@vmware.com> User-Agent: Mutt/1.10.1 (2018-07-13) 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, Jun 25, 2019 at 02:33:06AM +0530, Ajay Kaher wrote: >coredump: fix race condition between mmget_not_zero()/get_task_mm() >and core dumping > >[PATCH v4 1/3]: >Backporting of commit 04f5866e41fb70690e28397487d8bd8eea7d712a upstream. > >[PATCH v4 2/3]: >Extension of commit 04f5866e41fb to fix the race condition between >get_task_mm() and core dumping for IB->mlx4 and IB->mlx5 drivers. > >[PATCH v4 3/3] >Backporting of commit 59ea6d06cfa9247b586a695c21f94afa7183af74 upstream. > >[diff from v3]: >- added [PATCH v4 3/3] Why do all the patches have the same subject line? I guess it's correct for the first one, but can you explain what's up with #2 and #3? If the second one isn't upstream, please explain in detail why not and how 4.9 differs from upstream so that it requires a custom backport. The third one just looks like a different patch altogether with a wrong subject line? -- Thanks, Sasha