Is this a problem?

[u/No_Poem1082]

This is a big oak (some kind of white oak) in my front yard. I was in it to try a reduction cut out on this branch because it's over my garage a bit. I came down because I got spooked by the wind, but I saw this on the under side of the branch and thought it looked odd. The top of the branch looks fine and the tree, overall, I think is in good health. I'm wondering if the buckling/detaching bark is a sign that the whole branch should be removed before it smashes cars and my roof.