# \[PATCH v5 27/40\] kasan: kasan\_non\_canonical\_hook only for software modes - From: Andrey Konovalov \ - Date: 2020-10-12 20:47:43 - List: linux-arm-kernel - Page: https://ratatoskr.run/linux-arm-kernel/2020/10/6137986 - Thread: https://ratatoskr.run/linux-arm-kernel/2020/10/6137946/t.md ```text This is a preparatory commit for the upcoming addition of a new hardware tag-based (MTE-based) KASAN mode. kasan_non_canonical_hook() is only applicable to KASAN modes that use shadow memory, and won't be needed for hardware tag-based KASAN. No functional changes for software modes. Signed-off-by: Andrey Konovalov Signed-off-by: Vincenzo Frascino Reviewed-by: Marco Elver --- Change-Id: Icc9f5ef100a2e86f3a4214a0c3131a68266181b2 --- mm/kasan/report.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/kasan/report.c b/mm/kasan/report.c index 9e4d539d62f4..67aa30b45805 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -371,7 +371,8 @@ bool kasan_report(unsigned long addr, size_t size, bool is_write, return ret; } -#ifdef CONFIG_KASAN_INLINE +#if (defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)) && \ + defined(CONFIG_KASAN_INLINE) /* * With CONFIG_KASAN_INLINE, accesses to bogus pointers (outside the high * canonical half of the address space) cause out-of-bounds shadow memory reads -- 2.28.0.1011.ga647a8990f-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ```