KASAN provides an asynchronous mode of execution.
Add reporting functionality for this mode.
Cc: Dmitry Vyukov <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Andrey Konovalov <[email protected]>
Reviewed-by: Andrey Konovalov <[email protected]>
Signed-off-by: Vincenzo Frascino <[email protected]>
---
include/linux/kasan.h | 6 ++++++
mm/kasan/report.c | 13 +++++++++++++
2 files changed, 19 insertions(+)
diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index bb862d1f0e15..b6c502dad54d 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -360,6 +360,12 @@ static inline void *kasan_reset_tag(const void *addr)
#endif /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS*/
+#ifdef CONFIG_KASAN_HW_TAGS
+
+void kasan_report_async(void);
+
+#endif /* CONFIG_KASAN_HW_TAGS */
+
#ifdef CONFIG_KASAN_SW_TAGS
void __init kasan_init_sw_tags(void);
#else
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 234f35a84f19..e408e8c08a6f 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);
}
+#ifdef 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_HW_TAGS */
+
static void __kasan_report(unsigned long addr, size_t size, bool is_write,
unsigned long ip)
{
--
2.30.0