linux-kernel - [PATCH 3.4 090/214] nfsd: dont run get_file if nfs4_preprocess_stateid

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Message-Id: <20140605041651.734917421@linuxfoundation.org>
Date:	Wed,  4 Jun 2014 21:17:33 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, fanchaoting <fanchaoting@...fujitsu.com>,
	"J. Bruce Fields" <bfields@...hat.com>,
	Ben Hutchings <ben@...adent.org.uk>,
	Rui Xiang <rui.xiang@...wei.com>
Subject: [PATCH 3.4 090/214] nfsd: dont run get_file if nfs4_preprocess_stateid_op return error

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: fanchaoting <fanchaoting@...fujitsu.com>

commit b022032e195ffca83d7002d6b84297d796ed443b upstream.

we should return error status directly when nfs4_preprocess_stateid_op
return error.

Signed-off-by: fanchaoting <fanchaoting@...fujitsu.com>
Signed-off-by: J. Bruce Fields <bfields@...hat.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
Cc: Rui Xiang <rui.xiang@...wei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/nfsd/nfs4proc.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -904,14 +904,14 @@ nfsd4_write(struct svc_rqst *rqstp, stru
 
 	nfs4_lock_state();
 	status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
-	if (filp)
-		get_file(filp);
-	nfs4_unlock_state();
-
 	if (status) {
+		nfs4_unlock_state();
 		dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
 		return status;
 	}
+	if (filp)
+		get_file(filp);
+	nfs4_unlock_state();
 
 	cnt = write->wr_buflen;
 	write->wr_how_written = write->wr_stable_how;


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