audit: set the name_len in audit_inode for parent lookups

Currently, this gets set mostly by happenstance when we call into
audit_inode_child. While that might be a little more efficient, it seems
wrong. If the syscall ends up failing before audit_inode_child ever gets
called, then you'll have an audit_names record that shows the full path
but has the parent inode info attached.

Fix this by passing in a parent flag when we call audit_inode that gets
set to the value of LOOKUP_PARENT. We can then fix up the pathname for
the audit entry correctly from the get-go.

While we're at it, clean up the no-op macro for audit_inode in the
!CONFIG_AUDITSYSCALL case.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/open.c b/fs/open.c
index 44da0feeca2..a015437e153 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -478,7 +478,7 @@ SYSCALL_DEFINE2(fchmod, unsigned int, fd, umode_t, mode)
 
         file = fget(fd);
         if (file) {
-                audit_inode(NULL, file->f_path.dentry);
+                audit_inode(NULL, file->f_path.dentry, 0);
                 err = chmod_common(&file->f_path, mode);
                 fput(file);
         }
@@ -588,7 +588,7 @@ SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)
         error = mnt_want_write_file(f.file);
         if (error)
                 goto out_fput;
-        audit_inode(NULL, f.file->f_path.dentry);
+        audit_inode(NULL, f.file->f_path.dentry, 0);
         error = chown_common(&f.file->f_path, user, group);
         mnt_drop_write_file(f.file);
 out_fput: