[PATCH 4/4] fuse: check create mode in atomic open

[Miklos Szeredi]

From: Miklos Szeredi <mszeredi@xxxxxxx>

Verify that the VFS is passing us a complete create mode with the S_IFREG to
atomic open.

Reported-by: Steve <steveamigauk@xxxxxxxxxxx>
Reported-by: Richard W.M. Jones <rjones@xxxxxxxxxx>
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxx>
---
 fs/fuse/dir.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 8964cf3..324bc08 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -383,6 +383,9 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
 	struct fuse_entry_out outentry;
 	struct fuse_file *ff;
 
+	/* Userspace expects S_IFREG in create mode */
+	BUG_ON((mode & S_IFMT) != S_IFREG);
+
 	forget = fuse_alloc_forget();
 	err = -ENOMEM;
 	if (!forget)
-- 
1.7.7

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