linux-kernel - [113/264] nfsd4: Remove check for a 32-bit cookie in nfsd4

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Date:	Wed, 09 Nov 2011 13:32:40 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Bernd Schubert <bernd.schubert@...m.fraunhofer.de>,
	"J. Bruce Fields" <bfields@...hat.com>
Subject: [113/264] nfsd4: Remove check for a 32-bit cookie in nfsd4_readdir()

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

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

From: Bernd Schubert <bernd.schubert@...m.fraunhofer.de>

commit 832023bffb4b493f230be901f681020caf3ed1f8 upstream.

Fan Yong <yong.fan@...mcloud.com> noticed setting
FMODE_32bithash wouldn't work with nfsd v4, as
nfsd4_readdir() checks for 32 bit cookies. However, according to RFC 3530
cookies have a 64 bit type and cookies are also defined as u64 in
'struct nfsd4_readdir'. So remove the test for >32-bit values.

Signed-off-by: Bernd Schubert <bernd.schubert@...m.fraunhofer.de>
Signed-off-by: J. Bruce Fields <bfields@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 fs/nfsd/nfs4proc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -691,7 +691,7 @@ nfsd4_readdir(struct svc_rqst *rqstp, st
 	readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 	readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 
-	if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
+	if ((cookie == 1) || (cookie == 2) ||
 	    (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
 		return nfserr_bad_cookie;
 


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