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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-06-08 16:58:09 +0200
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-06-08 17:08:42 +0200
commit2d0dbc6ae8a5194aaecb9cfffb9053f38fce8b86 (patch)
treeb29655eb58107bc9e1413b86e68d35c8de3806cd /fs/nfs
parentNFSv4.1: Convert another trivial printk into a dprintk (diff)
downloadlinux-2d0dbc6ae8a5194aaecb9cfffb9053f38fce8b86.tar.xz
linux-2d0dbc6ae8a5194aaecb9cfffb9053f38fce8b86.zip
NFSv4: Fix unnecessary delegation returns in nfs4_do_open
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
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 5881f2cc5d81..f23977e4ac0f 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -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);