[PATCH v7 3/4] kasan: Add report for async mode
From: Vincenzo Frascino <vincenzo.frascino@arm.com>
Date: 2021-01-22 20:13:03
Also in:
lkml
Subsystem:
kasan, memory management, the rest · Maintainers:
Andrey Ryabinin, Andrew Morton, Linus Torvalds
KASAN provides an asynchronous mode of execution. Add reporting functionality for this mode. Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Andrey Ryabinin <redacted> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Konovalov <redacted> Reviewed-by: Andrey Konovalov <redacted> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> --- include/linux/kasan.h | 2 ++ mm/kasan/report.c | 13 +++++++++++++ 2 files changed, 15 insertions(+)
diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index bb862d1f0e15..b0a1d9dfa85c 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h@@ -351,6 +351,8 @@ static inline void *kasan_reset_tag(const void *addr) bool kasan_report(unsigned long addr, size_t size, bool is_write, unsigned long ip); +void kasan_report_async(void); + #else /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */ static inline void *kasan_reset_tag(const void *addr)
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 234f35a84f19..1390da06a988 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c@@ -358,6 +358,19 @@ void kasan_report_invalid_free(void *object, unsigned long ip) end_report(&flags); } +#if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS) +void kasan_report_async(void) +{ + unsigned long flags; + + start_report(&flags); + pr_err("BUG: KASAN: invalid-access\n"); + pr_err("Asynchronous mode enabled: no access details available\n"); + dump_stack(); + end_report(&flags); +} +#endif /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */ + static void __kasan_report(unsigned long addr, size_t size, bool is_write, unsigned long ip) {
--
2.30.0
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