cifs: Check for existing directory when opening file with O_CREAT

When opening a file with O_CREAT flag, check to see if the file opened
is an existing directory.

This prevents the directory from being opened which subsequently causes
a crash when the close function for directories cifs_closedir() is called
which frees up the file->private_data memory while the file is still
listed on the open file list for the tcon.

Signed-off-by: Sachin Prabhu <[email protected]>
Signed-off-by: Steve French <[email protected]>
CC: Stable <[email protected]>
Reported-by: Xiaoli Feng <[email protected]>

0 files changed, 0 insertions, 0 deletions