mempool: do not use ksize() for poisoning

Nothing appears to be using ksize() within the kmalloc-backed mempools
except the mempool poisoning logic.  Use the actual pool size instead of
the ksize() to avoid needing any special handling of the memory as needed
by KASAN, UBSAN_BOUNDS, nor FORTIFY_SOURCE.

[[email protected]: for slab mempools pool_data is not object size]
  Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kees Cook <[email protected]>
Signed-off-by: Vlastimil Babka <[email protected]>
Suggested-by: Vlastimil Babka <[email protected]>
  Link: https://lore.kernel.org/lkml/[email protected]/
Acked-by: Vlastimil Babka <[email protected]>
Reviewed-by: Andrey Konovalov <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Marco Elver <[email protected]>
Cc: Vincenzo Frascino <[email protected]>
Reported-by: Anders Roxell <[email protected]>
  Link: https://lore.kernel.org/all/20221031105514.GB69385@mutt/
Cc: Matthew Wilcox <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions