Miscellaneous page with pre-existing RAM disks config can't be saved
Having an installation of pfSense using RAM disks one can't save any other changes made on the System->Advanced->Miscellaneous page after Upgrading to 2.4.5. The page presents the error: "Combined size of /tmp and /var RAM disks would exceed free kernel memory." The statement of the error message would be right, if there should be added another RAM disk with the given size to the system in addition to the active one. I guess this check for free RAM doesn't take into account, that there is already a RAM disk existing, using RAM. The check should subtract an existing RAM disk size from the used memory to determine the free space required.
I would expect not changing anything to an existing RAM disks does not show the error.
affected version: pfSense 2.4.5, previous versions were fine.