I have not had chance to git bisect this but since it happened in stable 
I thought it was important to share sooner than later.

One possibly relevant commit between 6.6.3 and 6.6.4 could be:

   commit 2c975b0b8b11f1ffb1ed538609e2c89d8abf800e
   Author: Song Liu <song@kernel.org>
   Date:   Fri Nov 17 15:56:30 2023 -0800

     md: fix bi_status reporting in md_end_clone_io

log attached shows page_fault_oops.
Machine was up for 3 days before crash happened.

gene