From: Vincenzo Frascino <vincenzo.frascino@arm.com>
To: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Dmitry Vyukov <dvyukov@google.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Marco Elver <elver@google.com>,
Evgenii Stepanov <eugenis@google.com>,
Branislav Rankov <Branislav.Rankov@arm.com>,
Andrey Konovalov <andreyknvl@google.com>
Subject: [PATCH v9 3/4] kasan: Add report for async mode
Date: Tue, 26 Jan 2021 13:46:02 +0000 [thread overview]
Message-ID: <20210126134603.49759-4-vincenzo.frascino@arm.com> (raw)
In-Reply-To: <20210126134603.49759-1-vincenzo.frascino@arm.com>
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: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
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 87b271206163..69bad9c01aed 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -360,6 +360,19 @@ 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");
+ 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
next prev parent reply other threads:[~2021-01-26 13:48 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-26 13:45 [PATCH v9 0/4] arm64: ARMv8.5-A: MTE: Add async mode support Vincenzo Frascino
2021-01-26 13:46 ` [PATCH v9 1/4] arm64: mte: Add asynchronous " Vincenzo Frascino
2021-01-26 13:46 ` [PATCH v9 2/4] kasan: Add KASAN mode kernel parameter Vincenzo Frascino
2021-01-26 13:46 ` Vincenzo Frascino [this message]
2021-01-29 17:40 ` [PATCH v9 3/4] kasan: Add report for async mode Andrey Konovalov
2021-01-29 17:48 ` Vincenzo Frascino
2021-01-29 17:56 ` Andrey Konovalov
2021-01-29 18:01 ` Vincenzo Frascino
2021-01-29 18:10 ` Andrey Konovalov
2021-01-29 18:18 ` Vincenzo Frascino
2021-01-29 18:00 ` Vincenzo Frascino
2021-01-29 18:09 ` Andrey Konovalov
2021-01-29 18:16 ` Vincenzo Frascino
2021-01-29 18:46 ` Vincenzo Frascino
2021-01-29 18:44 ` Andrey Konovalov
2021-01-26 13:46 ` [PATCH v9 4/4] arm64: mte: Enable async tag check fault Vincenzo Frascino
2021-01-27 20:00 ` [PATCH v9 0/4] arm64: ARMv8.5-A: MTE: Add async mode support Andrey Konovalov
2021-01-27 22:19 ` Will Deacon
2021-01-29 17:54 ` Vincenzo Frascino
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