From patchwork Wed Jul 15 16:26:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Colin King X-Patchwork-Id: 11665903 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C8CA71392 for ; Wed, 15 Jul 2020 16:26:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B07382065E for ; Wed, 15 Jul 2020 16:26:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726964AbgGOQ0N (ORCPT ); Wed, 15 Jul 2020 12:26:13 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:53067 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725885AbgGOQ0M (ORCPT ); Wed, 15 Jul 2020 12:26:12 -0400 Received: from 1.general.cking.uk.vpn ([10.172.193.212] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1jvkEO-0008Ht-W3; Wed, 15 Jul 2020 16:26:05 +0000 From: Colin King To: Trond Myklebust , Anna Schumaker , "J . Bruce Fields" , Chuck Lever , "David S . Miller" , Jakub Kicinski , linux-nfs@vger.kernel.org, netdev@vger.kernel.org Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] xprtrdma: fix incorrect header size calcations Date: Wed, 15 Jul 2020 17:26:04 +0100 Message-Id: <20200715162604.1080552-1-colin.king@canonical.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Colin Ian King Currently the header size calculations are using an assignment operator instead of a += operator when accumulating the header size leading to incorrect sizes. Fix this by using the correct operator. Addresses-Coverity: ("Unused value") Fixes: 302d3deb2068 ("xprtrdma: Prevent inline overflow") Signed-off-by: Colin Ian King Reviewed-by: Chuck Lever --- net/sunrpc/xprtrdma/rpc_rdma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index 935bbef2f7be..453bacc99907 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -71,7 +71,7 @@ static unsigned int rpcrdma_max_call_header_size(unsigned int maxsegs) size = RPCRDMA_HDRLEN_MIN; /* Maximum Read list size */ - size = maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32); + size += maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32); /* Minimal Read chunk size */ size += sizeof(__be32); /* segment count */ @@ -94,7 +94,7 @@ static unsigned int rpcrdma_max_reply_header_size(unsigned int maxsegs) size = RPCRDMA_HDRLEN_MIN; /* Maximum Write list size */ - size = sizeof(__be32); /* segment count */ + size += sizeof(__be32); /* segment count */ size += maxsegs * rpcrdma_segment_maxsz * sizeof(__be32); size += sizeof(__be32); /* list discriminator */