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[68.61.232.219]) by smtp.gmail.com with ESMTPSA id q7sm2604044qkb.22.2020.11.23.12.05.24 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 23 Nov 2020 12:05:24 -0800 (PST) Sender: Chuck Lever Received: from klimt.1015granger.net (klimt.1015granger.net [192.168.1.55]) by gateway.1015granger.net (8.14.7/8.14.7) with ESMTP id 0ANK5N0H010316 for ; Mon, 23 Nov 2020 20:05:23 GMT Subject: [PATCH v3 16/85] NFSD: Replace READ* macros that decode the fattr4 time_set attributes From: Chuck Lever To: linux-nfs@vger.kernel.org Date: Mon, 23 Nov 2020 15:05:23 -0500 Message-ID: <160616192333.51996.682877163956950323.stgit@klimt.1015granger.net> In-Reply-To: <160616177104.51996.14915419165992024951.stgit@klimt.1015granger.net> References: <160616177104.51996.14915419165992024951.stgit@klimt.1015granger.net> User-Agent: StGit/0.23-29-ga622f1 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Signed-off-by: Chuck Lever --- fs/nfsd/nfs4xdr.c | 39 +++++++++++++++++++++++++++++---------- 1 file changed, 29 insertions(+), 10 deletions(-) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index e5f73bfc79dc..2668c150042e 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -219,6 +219,21 @@ nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv) DECODE_TAIL; } +static __be32 +nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv) +{ + __be32 *p; + + p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3); + if (!p) + return nfserr_bad_xdr; + p = xdr_decode_hyper(p, &tv->tv_sec); + tv->tv_nsec = be32_to_cpup(p++); + if (tv->tv_nsec >= (u32)1000000000) + return nfserr_inval; + return nfs_ok; +} + static __be32 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) { @@ -388,11 +403,13 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, iattr->ia_valid |= ATTR_GID; } if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { - READ_BUF(4); - dummy32 = be32_to_cpup(p++); - switch (dummy32) { + u32 set_it; + + if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0) + return nfserr_bad_xdr; + switch (set_it) { case NFS4_SET_TO_CLIENT_TIME: - status = nfsd4_decode_time(argp, &iattr->ia_atime); + status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime); if (status) return status; iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); @@ -401,15 +418,17 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, iattr->ia_valid |= ATTR_ATIME; break; default: - goto xdr_error; + return nfserr_bad_xdr; } } if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { - READ_BUF(4); - dummy32 = be32_to_cpup(p++); - switch (dummy32) { + u32 set_it; + + if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0) + return nfserr_bad_xdr; + switch (set_it) { case NFS4_SET_TO_CLIENT_TIME: - status = nfsd4_decode_time(argp, &iattr->ia_mtime); + status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime); if (status) return status; iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); @@ -418,7 +437,7 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, iattr->ia_valid |= ATTR_MTIME; break; default: - goto xdr_error; + return nfserr_bad_xdr; } }