Merge tag 'v6.15rc-part2-ksmbd-server-fixes' of git://git.samba.org/ksmbd

Pull smb server fixes from Steve French:
 "Four ksmbd SMB3 server fixes, all also for stable"

* tag 'v6.15rc-part2-ksmbd-server-fixes' of git://git.samba.org/ksmbd:
  ksmbd: fix null pointer dereference in alloc_preauth_hash()
  ksmbd: validate zero num_subauth before sub_auth is accessed
  ksmbd: fix overflow in dacloffset bounds check
  ksmbd: fix session use-after-free in multichannel connection