[PATCH 2/3] nfsd4: fix open permission checking

[J. Bruce Fields]

We weren't actually checking for SHARE_ACCESS_WRITE, with the result that
the owner could open a non-writeable file for write!

Continue to allow DENY_WRITE only with write access.

Thanks to Jim Rees for reporting the bug.

Signed-off-by: J. Bruce Fields <bfields at citi.umich.edu>
---
 fs/nfsd/nfs4proc.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index a05d337..d1fac68 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -78,8 +78,10 @@ do_open_permission(struct svc_rqst *rqst
 
 	if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
 		accmode |= MAY_READ;
-	if (open->op_share_deny & NFS4_SHARE_ACCESS_WRITE)
+	if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
 		accmode |= (MAY_WRITE | MAY_TRUNC);
+	if (open->op_share_deny & NFS4_SHARE_DENY_WRITE)
+		accmode |= MAY_WRITE;
 
 	status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
 
-- 
1.4.2.3.gabd697