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=-10.1 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,USER_AGENT_GIT 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 0D7B1C282C3 for ; Thu, 24 Jan 2019 19:29:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C0730218D4 for ; Thu, 24 Jan 2019 19:29:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548358157; bh=pohT3oIV2LkH3aC6Tz+EfJARSP2u+QsDAtN97YpzyWY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=D6l9A6VvAKbE0mi9bz7A2Cy+kcu/Fq2O+tFdEJndaDLsC+SjnNE9WZfqej+9YtJPV ZL9O3HopHSprcOAnx4dQzN/VsHhPBTXPjOwFnW1nA26hcJuswRT1p+ETP0+kD5VVuI 4h8hO198x8DzIzotAh57ZF/BXkhVeScX3+13mm34= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731127AbfAXT3Q (ORCPT ); Thu, 24 Jan 2019 14:29:16 -0500 Received: from mail.kernel.org ([198.145.29.99]:56262 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731115AbfAXT3M (ORCPT ); Thu, 24 Jan 2019 14:29:12 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 9DADE218D4; Thu, 24 Jan 2019 19:29:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548358152; bh=pohT3oIV2LkH3aC6Tz+EfJARSP2u+QsDAtN97YpzyWY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iFsVdepwjI0XSlqQSHmeRPVopBysbU7fORGkk8FuxeYV9wN0o/D0jsw4ffJlAJP81 ksiH1hTVL1ZD93pvXy1IBsqBk6vju+KueZVTHQwVy57DaXy/yFWGo//Do8so40uY9S rjB39ro27UqnXf09SmeHSRbTv+mzmQyv54YiOxPU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Anna Schumaker , Chuck Lever , Sagi Grimberg , Jason Gunthorpe , Sasha Levin Subject: [PATCH 4.9 12/39] rxe: IB_WR_REG_MR does not capture MRs iova field Date: Thu, 24 Jan 2019 20:20:15 +0100 Message-Id: <20190124190448.664312135@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190124190448.232316246@linuxfoundation.org> References: <20190124190448.232316246@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore 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 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit b024dd0eba6e6d568f69d63c5e3153aba94c23e3 ] FRWR memory registration is done with a series of calls and WRs. 1. ULP invokes ib_dma_map_sg() 2. ULP invokes ib_map_mr_sg() 3. ULP posts an IB_WR_REG_MR on the Send queue Step 2 generates an iova. It is permissible for ULPs to change this iova (with certain restrictions) between steps 2 and 3. rxe_map_mr_sg captures the MR's iova but later when rxe processes the REG_MR WR, it ignores the MR's iova field. If a ULP alters the MR's iova after step 2 but before step 3, rxe never captures that change. When the remote sends an RDMA Read targeting that MR, rxe looks up the R_key, but the altered iova does not match the iova stored in the MR, causing the RDMA Read request to fail. Reported-by: Anna Schumaker Signed-off-by: Chuck Lever Reviewed-by: Sagi Grimberg Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/sw/rxe/rxe_req.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/infiniband/sw/rxe/rxe_req.c b/drivers/infiniband/sw/rxe/rxe_req.c index 47219ebd8ff2..0f9fe2ca2a91 100644 --- a/drivers/infiniband/sw/rxe/rxe_req.c +++ b/drivers/infiniband/sw/rxe/rxe_req.c @@ -643,6 +643,7 @@ next_wqe: rmr->access = wqe->wr.wr.reg.access; rmr->lkey = wqe->wr.wr.reg.key; rmr->rkey = wqe->wr.wr.reg.key; + rmr->iova = wqe->wr.wr.reg.mr->iova; wqe->state = wqe_state_done; wqe->status = IB_WC_SUCCESS; } else { -- 2.19.1