From c30e92df30d7d5fe65262fbce5d1b7de675fe34e Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Mon, 10 Oct 2011 17:34:31 -0400 Subject: [PATCH] nfsd4: ignore WANT bits in open downgrade We don't use WANT bits yet--and sending them can probably trigger a BUG() further down. Cc: stable@kernel.org Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4state.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 683885b18ceb..a39a542d8be5 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -3574,6 +3574,8 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp, 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(); status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, -- 2.20.1