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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 1B153C10F14 for ; Thu, 18 Apr 2019 18:08:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DFE822186A for ; Thu, 18 Apr 2019 18:08:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555610886; bh=j58yixsDI6ZuiKiOz58zEgSjU2aeoQzcyZ4UP7Ai3fs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=dg0MXY4r5XReckJ495E0t48nQfnXgKyUTcWwnm4AXpvSZLTVRQBdUddQ+Fk6AA47H ZVewktZFEGWBL38oB+dpIg3jqdR4qt0t1ke+eVNLQcfR6PLyV2RcA8SG+DFFRI5bhn iF4ASa/IAAUjmULJQeenlqDHnpvANoJ7IOUxRWgg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391721AbfDRSIE (ORCPT ); Thu, 18 Apr 2019 14:08:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:39046 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389981AbfDRSIC (ORCPT ); Thu, 18 Apr 2019 14:08:02 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 BF51B217FA; Thu, 18 Apr 2019 18:08:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555610881; bh=j58yixsDI6ZuiKiOz58zEgSjU2aeoQzcyZ4UP7Ai3fs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bxNts09lLUrGOvGdpIlGchhSlpvCvfJ/0vgk7oJV1NWUf+63D6Sck+iiakPIOU84z ssfIUvqo2DaEjYoyyOxhL+VKWDxMVogGDuGVHtKwe1hs9W/3Jkm7qCHpM+XHLKyqss Pv461pPkL6CgZOs70rR3aBYL41J/5XCt71egPTzk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jack Morgenstein , Leon Romanovsky , Jason Gunthorpe , Sasha Levin Subject: [PATCH 4.9 07/50] IB/mlx4: Fix race condition between catas error reset and aliasguid flows Date: Thu, 18 Apr 2019 19:57:18 +0200 Message-Id: <20190418160423.786114890@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190418160422.455656724@linuxfoundation.org> References: <20190418160422.455656724@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ Upstream commit 587443e7773e150ae29e643ee8f41a1eed226565 ] Code review revealed a race condition which could allow the catas error flow to interrupt the alias guid query post mechanism at random points. Thiis is fixed by doing cancel_delayed_work_sync() instead of cancel_delayed_work() during the alias guid mechanism destroy flow. Fixes: a0c64a17aba8 ("mlx4: Add alias_guid mechanism") Signed-off-by: Jack Morgenstein Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/hw/mlx4/alias_GUID.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/mlx4/alias_GUID.c b/drivers/infiniband/hw/mlx4/alias_GUID.c index 5e9939045852..ec138845a474 100644 --- a/drivers/infiniband/hw/mlx4/alias_GUID.c +++ b/drivers/infiniband/hw/mlx4/alias_GUID.c @@ -805,8 +805,8 @@ void mlx4_ib_destroy_alias_guid_service(struct mlx4_ib_dev *dev) unsigned long flags; for (i = 0 ; i < dev->num_ports; i++) { - cancel_delayed_work(&dev->sriov.alias_guid.ports_guid[i].alias_guid_work); det = &sriov->alias_guid.ports_guid[i]; + cancel_delayed_work_sync(&det->alias_guid_work); spin_lock_irqsave(&sriov->alias_guid.ag_work_lock, flags); while (!list_empty(&det->cb_list)) { cb_ctx = list_entry(det->cb_list.next, -- 2.19.1