== DF-3165: getblk size>MAXBSIZE panic via rootdir_icb.len ==
>> mount_udf -o ro /dev/vn0 /mnt   (expect panic: getblk: size(1048576) > MAXBSIZE(65536))
mount_udf: /dev/vn0: Invalid argument
mount rc=1 (unexpected -- kernel should have panicked here)
SCRIPT_DONE rc=0
(no udf mount - clean fail, no panic)
swap low/high-water marks set to 41940/62910
vn0: MBR magic not found; assume a COMPATIBILITY_SLICE (s0)
Invalid root file entry length 1048576