tools/mm: fix slabinfo crash when MAX_SLABS is exceeded

tools/mm: fix slabinfo crash when MAX_SLABS is exceeded

The number of slabs can easily exceed the hard coded MAX_SLABS in the
slabinfo tool, causing it to overwrite memory and crash.

Increase the value of MAX_SLABS, and check if that has been exceeded for
each new slab, instead of at the end when it's already too late.  Also
move the check for MAX_ALIASES into the loop body.

Link: https://lkml.kernel.org/r/20241031105534.565533-1-marc.c.dionne@gmail.com
Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>