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NFSv4: Fix unnecessary delegation returns in nfs4_do_open

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While nfs4_do_open() expects the fmode argument to be restricted to
combinations of FMODE_READ and FMODE_WRITE, both nfs4_atomic_open()
and nfs4_proc_create will pass the nfs_open_context->mode,
which contains the full fmode_t.

This patch ensures that nfs4_do_open strips the other fmode_t bits,
fixing a problem in which the nfs4_do_open call would result in an
unnecessary delegation return.

Reported-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Trond Myklebust 2012-06-08 10:58:09 -04:00
parent 02c67525cf
commit 2d0dbc6ae8
1 changed files with 1 additions and 0 deletions
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fs/nfs/nfs4proc.c
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@ -1902,6 +1902,7 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir,
struct nfs4_state *res;
int status;
fmode &= FMODE_READ|FMODE_WRITE;
do {
status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
&res, ctx_th);