[118/264] nfsd4: ignore WANT bits in open downgrade

From: Greg KH
Date: Wed Nov 09 2011 - 22:41:11 EST


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

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

From: "J. Bruce Fields" <bfields@xxxxxxxxxx>

commit c30e92df30d7d5fe65262fbce5d1b7de675fe34e upstream.

We don't use WANT bits yet--and sending them can probably trigger a
BUG() further down.

Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
fs/nfsd/nfs4state.c | 2 ++
1 file changed, 2 insertions(+)

--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3570,6 +3570,8 @@ nfsd4_open_downgrade(struct svc_rqst *rq
if (!access_valid(od->od_share_access, cstate->minorversion)
|| !deny_valid(od->od_share_deny))
return nfserr_inval;
+ /* We don't yet support WANT bits: */
+ od->od_share_access &= NFS4_SHARE_ACCESS_MASK;

nfs4_lock_state();
if ((status = nfs4_preprocess_seqid_op(cstate,


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