In nodemap_del() around line 4364, there's this check:

if (fileset_prim_exists && !rc && !nodemap->nmf_fileset_use_iam &&
  !nodemap->nm_dyn)
  *out_clean_llog_fileset = true;

But nodemap_del() is called with NULL for that param at line 4311 (nodemap_del(nm->nm_name, NULL)). The other two spots in the same function do guard with && out_clean_llog_fileset before dereferencing, so it looks like this one just got missed?

Discovered by code inspect.