Reference in a new issue

Blame

Copy permalink

Reference in a new issue

Copy permalink

Alexander Potapenko 45785772d5 mm/kfence: disable KFENCE upon KASAN HW tags enablement ... commit 09833d99db upstream. KFENCE does not currently support KASAN hardware tags. As a result, the two features are incompatible when enabled simultaneously. Given that MTE provides deterministic protection and KFENCE is a sampling-based debugging tool, prioritize the stronger hardware protections. Disable KFENCE initialization and free the pre-allocated pool if KASAN hardware tags are detected to ensure the system maintains the security guarantees provided by MTE. Link: https://lkml.kernel.org/r/20260213095410.1862978-1-glider@google.com Fixes: 0ce20dd840 ("mm: add Kernel Electric-Fence infrastructure") Signed-off-by: Alexander Potapenko <glider@google.com> Suggested-by: Marco Elver <elver@google.com> Reviewed-by: Marco Elver <elver@google.com> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Ernesto Martinez Garcia <ernesto.martinezgarcia@tugraz.at> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Kees Cook <kees@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2026-03-19 16:08:29 +01:00
..
.kunitconfig	kfence: test: use new suite_{init/exit} support, add .kunitconfig	2022-05-02 12:35:57 -06:00
core.c	mm/kfence: disable KFENCE upon KASAN HW tags enablement	2026-03-19 16:08:29 +01:00
kfence.h	kfence: save freeing stack trace at calling time instead of freeing time	2024-09-01 20:26:12 -07:00
kfence_test.c	mm/kfence: use str_write_read() helper in get_access_type()	2025-01-25 20:22:45 -08:00
Makefile	kfence: avoid passing -g for test	2023-03-23 17:18:35 -07:00
report.c	mm/kfence: use str_write_read() helper in get_access_type()	2025-01-25 20:22:45 -08:00