Commit db5a080b authored by Vincenzo Frascino's avatar Vincenzo Frascino
Browse files

kasan: Add report for async mode



KASAN provides an asynchronous mode of execution.

Add reporting functionality for this mode.

Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: default avatarAndrey Konovalov <andreyknvl@google.com>
Signed-off-by: Vincenzo Frascino's avatarVincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: default avatarAndrey Konovalov <andreyknvl@google.com>
parent d85e6bac
......@@ -376,6 +376,12 @@ 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
......
......@@ -87,7 +87,8 @@ static void start_report(unsigned long *flags)
static void end_report(unsigned long *flags, unsigned long addr)
{
trace_error_report_end(ERROR_DETECTOR_KASAN, addr);
if (!kasan_flag_async)
trace_error_report_end(ERROR_DETECTOR_KASAN, addr);
pr_err("==================================================================\n");
add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
spin_unlock_irqrestore(&report_lock, *flags);
......@@ -360,6 +361,20 @@ void kasan_report_invalid_free(void *object, unsigned long ip)
end_report(&flags, (unsigned long)object);
}
#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");
pr_err("\n");
dump_stack();
end_report(&flags, 0);
}
#endif /* CONFIG_KASAN_HW_TAGS */
static void __kasan_report(unsigned long addr, size_t size, bool is_write,
unsigned long ip)
{
......
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