diff options
| author | Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> | 2021-11-11 07:32:49 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-11 20:34:35 +0300 |
| commit | b873e986816a0b8408c177b2c52a6915cca8713c (patch) | |
| tree | 533da3759b271ac1dafbe4b889b8d8948a530465 /mm | |
| parent | ab2f9d2d3626a8f31bfe2f47746e04819d8ffe9c (diff) | |
| download | linux-b873e986816a0b8408c177b2c52a6915cca8713c.tar.xz | |
kasan: add kasan mode messages when kasan init
There are multiple kasan modes. It makes sense that we add some
messages to know which kasan mode is active when booting up [1].
Link: https://bugzilla.kernel.org/show_bug.cgi?id=212195 [1]
Link: https://lkml.kernel.org/r/20211020094850.4113-1-Kuan-Ying.Lee@mediatek.com
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Reviewed-by: Marco Elver <elver@google.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Chinwen Chang <chinwen.chang@mediatek.com>
Cc: Yee Lee <yee.lee@mediatek.com>
Cc: Nicholas Tang <nicholas.tang@mediatek.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/kasan/hw_tags.c | 14 | ||||
| -rw-r--r-- | mm/kasan/sw_tags.c | 2 |
2 files changed, 14 insertions, 2 deletions
diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c index dc892119e88f..7355cb534e4f 100644 --- a/mm/kasan/hw_tags.c +++ b/mm/kasan/hw_tags.c @@ -106,6 +106,16 @@ static int __init early_kasan_flag_stacktrace(char *arg) } early_param("kasan.stacktrace", early_kasan_flag_stacktrace); +static inline const char *kasan_mode_info(void) +{ + if (kasan_mode == KASAN_MODE_ASYNC) + return "async"; + else if (kasan_mode == KASAN_MODE_ASYMM) + return "asymm"; + else + return "sync"; +} + /* kasan_init_hw_tags_cpu() is called for each CPU. */ void kasan_init_hw_tags_cpu(void) { @@ -177,7 +187,9 @@ void __init kasan_init_hw_tags(void) break; } - pr_info("KernelAddressSanitizer initialized\n"); + pr_info("KernelAddressSanitizer initialized (hw-tags, mode=%s, stacktrace=%s)\n", + kasan_mode_info(), + kasan_stack_collection_enabled() ? "on" : "off"); } void kasan_alloc_pages(struct page *page, unsigned int order, gfp_t flags) diff --git a/mm/kasan/sw_tags.c b/mm/kasan/sw_tags.c index bd3f540feb47..77f13f391b57 100644 --- a/mm/kasan/sw_tags.c +++ b/mm/kasan/sw_tags.c @@ -42,7 +42,7 @@ void __init kasan_init_sw_tags(void) for_each_possible_cpu(cpu) per_cpu(prng_state, cpu) = (u32)get_cycles(); - pr_info("KernelAddressSanitizer initialized\n"); + pr_info("KernelAddressSanitizer initialized (sw-tags)\n"); } /* |