diff options
| author | Andrey Konovalov <andreyknvl@google.com> | 2021-04-29 22:59:59 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-30 11:20:41 -0700 |
| commit | aa5c219c60ccb75b50c16329885b65c275172e4a (patch) | |
| tree | aee5e3a5523e9908ab347da46ebbb5eafd1616c0 /mm/kasan/generic.c | |
| parent | d9b6f90794ba2a2f47d1646cda343924b092b3c2 (diff) | |
kasan: init memory in kasan_(un)poison for HW_TAGS
This change adds an argument to kasan_poison() and kasan_unpoison() that
allows initializing memory along with setting the tags for HW_TAGS.
Combining setting allocation tags with memory initialization will improve
HW_TAGS KASAN performance when init_on_alloc/free is enabled.
This change doesn't integrate memory initialization with KASAN, this is
done is subsequent patches in this series.
Link: https://lkml.kernel.org/r/3054314039fa64510947e674180d675cab1b4c41.1615296150.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Branislav Rankov <Branislav.Rankov@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
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/generic.c')
| -rw-r--r-- | mm/kasan/generic.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c index 2e55e0f82f39..53cbf28859b5 100644 --- a/mm/kasan/generic.c +++ b/mm/kasan/generic.c @@ -208,11 +208,11 @@ static void register_global(struct kasan_global *global) { size_t aligned_size = round_up(global->size, KASAN_GRANULE_SIZE); - kasan_unpoison(global->beg, global->size); + kasan_unpoison(global->beg, global->size, false); kasan_poison(global->beg + aligned_size, global->size_with_redzone - aligned_size, - KASAN_GLOBAL_REDZONE); + KASAN_GLOBAL_REDZONE, false); } void __asan_register_globals(struct kasan_global *globals, size_t size) @@ -292,11 +292,11 @@ void __asan_alloca_poison(unsigned long addr, size_t size) WARN_ON(!IS_ALIGNED(addr, KASAN_ALLOCA_REDZONE_SIZE)); kasan_unpoison((const void *)(addr + rounded_down_size), - size - rounded_down_size); + size - rounded_down_size, false); kasan_poison(left_redzone, KASAN_ALLOCA_REDZONE_SIZE, - KASAN_ALLOCA_LEFT); + KASAN_ALLOCA_LEFT, false); kasan_poison(right_redzone, padding_size + KASAN_ALLOCA_REDZONE_SIZE, - KASAN_ALLOCA_RIGHT); + KASAN_ALLOCA_RIGHT, false); } EXPORT_SYMBOL(__asan_alloca_poison); @@ -306,7 +306,7 @@ void __asan_allocas_unpoison(const void *stack_top, const void *stack_bottom) if (unlikely(!stack_top || stack_top > stack_bottom)) return; - kasan_unpoison(stack_top, stack_bottom - stack_top); + kasan_unpoison(stack_top, stack_bottom - stack_top, false); } EXPORT_SYMBOL(__asan_allocas_unpoison); |