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,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 3AA62C433DF for ; Tue, 9 Jun 2020 00:42:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E7832076C for ; Tue, 9 Jun 2020 00:42:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591663371; bh=jCGm61rHDVJ9r6X9hoS3jwAJ1rd3zWfrw3/4ZrbkIv0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=b7d8JTToGwGQU/OqaFWSZdutLiYmpwB69Z62hKmaVblbx5iE4tJIs+K6054qk3Djc oe57PHAK80NPJNdOhBMRE+oAUb7JBSO329JkfE+jCgO/biGIwEjOwbZRsnJAgRfRTU BMuYg6lj0n5G0WJXcP2GrsGN7WHOzkwOOOk2JEEc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729224AbgFIAms (ORCPT ); Mon, 8 Jun 2020 20:42:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:59794 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729072AbgFHXMW (ORCPT ); Mon, 8 Jun 2020 19:12:22 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9CE7C20897; Mon, 8 Jun 2020 23:12:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591657941; bh=jCGm61rHDVJ9r6X9hoS3jwAJ1rd3zWfrw3/4ZrbkIv0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1TY0FUzdwfIGLw1E2sR+sgJW22+i+8dFZyP96hGVIXUiF2xRKDiUFgrTIbvKSTOr9 HrjmfqY4BfdQQMjCLzgla96xXviQokKpKep0CbCeYGTrmNVuuWUPJtrkwyxNT2aJx8 j+jsabzH9NDYhuK9E6ezIAGBIiJxJBfESb4c81F0= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Olga Kornievskaia , Olga Kornievskaia , Trond Myklebust , Sasha Levin , linux-nfs@vger.kernel.org Subject: [PATCH AUTOSEL 5.6 007/606] NFSv3: fix rpc receive buffer size for MOUNT call Date: Mon, 8 Jun 2020 19:02:12 -0400 Message-Id: <20200608231211.3363633-7-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200608231211.3363633-1-sashal@kernel.org> References: <20200608231211.3363633-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Olga Kornievskaia [ Upstream commit 8eed292bc8cbf737e46fb1c119d4c8f6dcb00650 ] Prior to commit e3d3ab64dd66 ("SUNRPC: Use au_rslack when computing reply buffer size"), there was enough slack in the reply buffer to commodate filehandles of size 60bytes. However, the real problem was that the reply buffer size for the MOUNT operation was not correctly calculated. Received buffer size used the filehandle size for NFSv2 (32bytes) which is much smaller than the allowed filehandle size for the v3 mounts. Fix the reply buffer size (decode arguments size) for the MNT command. Fixes: 2c94b8eca1a2 ("SUNRPC: Use au_rslack when computing reply buffer size") Signed-off-by: Olga Kornievskaia Signed-off-by: Trond Myklebust Signed-off-by: Sasha Levin --- fs/nfs/mount_clnt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c index 35c8cb2d7637..dda5c3e65d8d 100644 --- a/fs/nfs/mount_clnt.c +++ b/fs/nfs/mount_clnt.c @@ -30,6 +30,7 @@ #define encode_dirpath_sz (1 + XDR_QUADLEN(MNTPATHLEN)) #define MNT_status_sz (1) #define MNT_fhandle_sz XDR_QUADLEN(NFS2_FHSIZE) +#define MNT_fhandlev3_sz XDR_QUADLEN(NFS3_FHSIZE) #define MNT_authflav3_sz (1 + NFS_MAX_SECFLAVORS) /* @@ -37,7 +38,7 @@ */ #define MNT_enc_dirpath_sz encode_dirpath_sz #define MNT_dec_mountres_sz (MNT_status_sz + MNT_fhandle_sz) -#define MNT_dec_mountres3_sz (MNT_status_sz + MNT_fhandle_sz + \ +#define MNT_dec_mountres3_sz (MNT_status_sz + MNT_fhandlev3_sz + \ MNT_authflav3_sz) /* -- 2.25.1