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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BDEBEC433F5 for ; Thu, 3 Feb 2022 20:42:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355164AbiBCUmy (ORCPT ); Thu, 3 Feb 2022 15:42:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59170 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355797AbiBCUjL (ORCPT ); Thu, 3 Feb 2022 15:39:11 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9E3E1C06137F; Thu, 3 Feb 2022 12:36:24 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 59304B835A8; Thu, 3 Feb 2022 20:36:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 23F70C36AE2; Thu, 3 Feb 2022 20:36:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643920582; bh=pvHjRwPYTp6QvDSbZ2cNvqcx31PEPKULayVnag4bn4Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WrYBJH7fwHRagXJs2Q1vmWLRv0dSj9h+4pTZOULiz2v9y8LsNm/0kzTZDNMcist3q R8fOalTwg4x66UUUUo2arEyqNglK+wKQZ7XUk6/Ky/WSfBIkriZ2NcvpVh1ynFd3wk YSV6L6lfEcbpyUOQjCt4tW2Iv9Bi++JktNlutPJjBjQtStLH5ulO2jIOeuES8nVHnF jGRZrAvU7/9cKg4fRXnuoiQOpX/xjXdC7ChsR207P8ymDyx10atuwQGKDE2ADCl0iL 9guUoh0ZDR+qGQAS9EVRieEoPU1zqZnBEsiTs9TcG3U2Ox+mJepPAN0zr+YzzB53do kY1yw4WAZpJmQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Olga Kornievskaia , Anna Schumaker , Sasha Levin , trond.myklebust@hammerspace.com, anna.schumaker@netapp.com, linux-nfs@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 05/10] NFSv4 remove zero number of fs_locations entries error check Date: Thu, 3 Feb 2022 15:36:08 -0500 Message-Id: <20220203203613.4165-5-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220203203613.4165-1-sashal@kernel.org> References: <20220203203613.4165-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Olga Kornievskaia [ Upstream commit 90e12a3191040bd3854d3e236c35921e4e92a044 ] Remove the check for the zero length fs_locations reply in the xdr decoding, and instead check for that in the migration code. Signed-off-by: Olga Kornievskaia Signed-off-by: Anna Schumaker Signed-off-by: Sasha Levin --- fs/nfs/nfs4state.c | 3 +++ fs/nfs/nfs4xdr.c | 2 -- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index b3086e99420c7..9c98547fcefcc 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -2066,6 +2066,9 @@ static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred) } result = -NFS4ERR_NXIO; + if (!locations->nlocations) + goto out; + if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { dprintk("<-- %s: No fs_locations data, migration skipped\n", __func__); diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 8a61dc21d3d68..56e48642c43eb 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -3747,8 +3747,6 @@ static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, st if (unlikely(!p)) goto out_overflow; n = be32_to_cpup(p); - if (n <= 0) - goto out_eio; for (res->nlocations = 0; res->nlocations < n; res->nlocations++) { u32 m; struct nfs4_fs_location *loc; -- 2.34.1