diff options
| author | Andrey Konovalov <andreyknvl@google.com> | 2021-02-24 12:05:26 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-24 13:38:31 -0800 |
| commit | f05842cfb9ae25b5e78c618429c4716d9e4d5fc8 (patch) | |
| tree | 903a626a0cf734d328721455ef8e8b49b9ceb47e /mm/kasan/hw_tags.c | |
| parent | 573a48092313dec7b254d9dbcc2db62167f00456 (diff) | |
kasan, arm64: allow using KUnit tests with HW_TAGS mode
On a high level, this patch allows running KUnit KASAN tests with the
hardware tag-based KASAN mode.
Internally, this change reenables tag checking at the end of each KASAN
test that triggers a tag fault and leads to tag checking being disabled.
Also simplify is_write calculation in report_tag_fault.
With this patch KASAN tests are still failing for the hardware tag-based
mode; fixes come in the next few patches.
[andreyknvl@google.com: export HW_TAGS symbols for KUnit tests]
Link: https://lkml.kernel.org/r/e7eeb252da408b08f0c81b950a55fb852f92000b.1613155970.git.andreyknvl@google.com
Link: https://linux-review.googlesource.com/id/Id94dc9eccd33b23cda4950be408c27f879e474c8
Link: https://lkml.kernel.org/r/51b23112cf3fd62b8f8e9df81026fa2b15870501.1610733117.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Branislav Rankov <Branislav.Rankov@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Marco Elver <elver@google.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/kasan/hw_tags.c')
| -rw-r--r-- | mm/kasan/hw_tags.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c index d558799b25b3..b31aeef505dd 100644 --- a/mm/kasan/hw_tags.c +++ b/mm/kasan/hw_tags.c @@ -185,3 +185,19 @@ struct kasan_track *kasan_get_free_track(struct kmem_cache *cache, return &alloc_meta->free_track[0]; } + +#if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST) + +void kasan_set_tagging_report_once(bool state) +{ + hw_set_tagging_report_once(state); +} +EXPORT_SYMBOL_GPL(kasan_set_tagging_report_once); + +void kasan_enable_tagging(void) +{ + hw_enable_tagging(); +} +EXPORT_SYMBOL_GPL(kasan_enable_tagging); + +#endif |