linux-kernel - [PATCH v2] fs/nfsd: Delete invalid assignment statements in nfsd4_decode_exchange

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Message-ID: <20180723015711.27961-1-nixiaoming@huawei.com>
Date:   Mon, 23 Jul 2018 09:57:11 +0800
From:   nixiaoming <nixiaoming@...wei.com>
To:     <bfields@...ldses.org>, <jlayton@...nel.org>,
        <chuck.lever@...cle.com>, <trondmy@...merspace.com>,
        <andros@...app.com>
CC:     <linux-nfs@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <nixiaoming@...wei.com>
Subject: [PATCH v2] fs/nfsd: Delete invalid assignment statements in nfsd4_decode_exchange_id

READ_BUF(8);
dummy = be32_to_cpup(p++);
dummy = be32_to_cpup(p++);
...
READ_BUF(4);
dummy = be32_to_cpup(p++);

Assigning value to "dummy" here, but that stored value
is overwritten before it can be used.
At the same time READ_BUF() will re-update the pointer p.

delete invalid assignment statements

Signed-off-by: nixiaoming <nixiaoming@...wei.com>
Signed-off-by: Chuck Lever <chuck.lever@...cle.com>
Signed-off-by: Trond Myklebust <trondmy@...merspace.com>
---
 fs/nfsd/nfs4xdr.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index a96843c..375ad4b 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1392,8 +1392,6 @@ nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
 
 		/* ssp_window and ssp_num_gss_handles */
 		READ_BUF(8);
-		dummy = be32_to_cpup(p++);
-		dummy = be32_to_cpup(p++);
 		break;
 	default:
 		goto xdr_error;
-- 
2.10.1