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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-06-08 10:58:09 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-06-22 11:36:54 -0700
commit5e74cfe1feb56745cecce815adf6fd2c7dfb6a58 (patch)
tree9057b07d5378285f5d650e0f0f1582915317ac7b /fs/nfs
parent5f1d81e9fb6c05e8ab89a610bb63cdc8f0f66d81 (diff)
NFSv4: Fix unnecessary delegation returns in nfs4_do_open
commit 2d0dbc6ae8a5194aaecb9cfffb9053f38fce8b86 upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/nfs4proc.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index e9b1eb701a0..d60c2d870ab 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1861,6 +1861,7 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry,
struct nfs4_state *res;
int status;
+ fmode &= FMODE_READ|FMODE_WRITE;
do {
status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
if (status == 0)