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
