Re: [PATCH v3 18/39] kasan: kasan_non_canonical_hook only for software modes
From: elver@google.com
Date: 2020-10-01 17:47:11
Also in:
linux-mm, lkml
On Fri, Sep 25, 2020 at 12:50AM +0200, Andrey Konovalov wrote:
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 <redacted> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Marco Elver <elver@google.com>
quoted hunk ↗ jump to hunk
--- 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-- 2.28.0.681.g6f77f65b4e-goog
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