Switch from file_permission() to vfs_permission() in sys_fchdir(): this avoids calling permission() with a NULL nameidata here. Signed-off-by: Andreas Gruenbacher Signed-off-by: John Johansen --- fs/open.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) --- a/fs/open.c +++ b/fs/open.c @@ -512,10 +512,8 @@ out: asmlinkage long sys_fchdir(unsigned int fd) { + struct nameidata nd; struct file *file; - struct dentry *dentry; - struct inode *inode; - struct vfsmount *mnt; int error; error = -EBADF; @@ -523,17 +521,17 @@ asmlinkage long sys_fchdir(unsigned int if (!file) goto out; - dentry = file->f_path.dentry; - mnt = file->f_path.mnt; - inode = dentry->d_inode; + nd.dentry = file->f_path.dentry; + nd.mnt = file->f_path.mnt; + nd.flags = 0; error = -ENOTDIR; - if (!S_ISDIR(inode->i_mode)) + if (!S_ISDIR(nd.dentry->d_inode->i_mode)) goto out_putf; - error = file_permission(file, MAY_EXEC); + error = vfs_permission(&nd, MAY_EXEC); if (!error) - set_fs_pwd(current->fs, mnt, dentry); + set_fs_pwd(current->fs, nd.mnt, nd.dentry); out_putf: fput(file); out: --