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 8FFC3C433F5 for ; Thu, 3 Feb 2022 20:43:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349948AbiBCUnI (ORCPT ); Thu, 3 Feb 2022 15:43:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59350 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355829AbiBCUjz (ORCPT ); Thu, 3 Feb 2022 15:39:55 -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 214C0C06177E; Thu, 3 Feb 2022 12:36:40 -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 DD6AFB835BC; Thu, 3 Feb 2022 20:36:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DA646C340F2; Thu, 3 Feb 2022 20:36:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643920597; bh=3ac+FuFvTfl2BMZ4CXOkDSBDx8Add5UW+u1yknlOleg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NgAYUT4ZSUqwR8oPQPR8wBqiQ9BK6URNMVGAAkXmLho1lzxFGn791YSJAQ+mcf+CC /3x6KiZ0mNmShZ+3wcv6uezg2mSZtyccpiY//lA9jkMv4dOHL7Jv/WcRaPIok1tpSL fWEGwlYF1F4MltrJmlILgvQ2b3weJlX0bVY0gwdT/cHQCQTiV2Dvnmhd/ckaZbZFQi lppGEOCHDX73JZdEBMEincnpHXJm/9OafsR0zYeDmL6DGwPG/Uu8Z/+k1M5dVYH4LC yq31uyCtFgkOss55NOnjDjI6fwbMPwIyjfPVWBrxi82d67x92lLrMpflZtG008bd2W 1GGDZ95b1EdgA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Xiaoke Wang , Anna Schumaker , Sasha Levin , trond.myklebust@hammerspace.com, anna.schumaker@netapp.com, linux-nfs@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 2/9] nfs: nfs4clinet: check the return value of kstrdup() Date: Thu, 3 Feb 2022 15:36:26 -0500 Message-Id: <20220203203633.4685-2-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220203203633.4685-1-sashal@kernel.org> References: <20220203203633.4685-1-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: Xiaoke Wang [ Upstream commit fbd2057e5329d3502a27491190237b6be52a1cb6 ] kstrdup() returns NULL when some internal memory errors happen, it is better to check the return value of it so to catch the memory error in time. Signed-off-by: Xiaoke Wang Signed-off-by: Anna Schumaker Signed-off-by: Sasha Levin --- fs/nfs/nfs4client.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index 02b01b4025f6e..c7672c89b9673 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -1241,8 +1241,11 @@ int nfs4_update_server(struct nfs_server *server, const char *hostname, } nfs_put_client(clp); - if (server->nfs_client->cl_hostname == NULL) + if (server->nfs_client->cl_hostname == NULL) { server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL); + if (server->nfs_client->cl_hostname == NULL) + return -ENOMEM; + } nfs_server_insert_lists(server); return nfs_probe_destination(server); -- 2.34.1