mm: kmsan: add tests for high-order page freeing

Browse source

Add regression tests to verify that KMSAN correctly poisons the full
memory range when freeing pages.

Specifically, verify that accessing the tail pages of a high-order
non-compound allocation triggers a use-after-free report.  This ensures
that the fix "mm: kmsan: Fix poisoning of high-order non-compound pages"
is working as expected.

Also add a test for standard order-0 pages for completeness.

Link: https://lore.kernel.org/all/20260104134348.3544298-1-ryan.roberts@arm.com/
Link: https://lkml.kernel.org/r/20260113091151.4035013-1-glider@google.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

This commit is contained in:

Alexander Potapenko 2026-01-13 10:11:50 +01:00 • committed by Andrew Morton

parent ed581147a4

commit 79ffad20eb

1 changed files with 48 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

49

mm/kmsan/kmsan_test.c

View file