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>,
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 v6 3/4] kasan: Add report for async mode
Date: Fri, 22 Jan 2021 13:59:54 +0000 [thread overview]
Message-ID: <20210122135955.30237-4-vincenzo.frascino@arm.com> (raw)
In-Reply-To: <20210122135955.30237-1-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 | 2 ++
mm/kasan/report.c | 11 +++++++++++
2 files changed, 13 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..2fd6845a95e9 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -358,6 +358,17 @@ void kasan_report_invalid_free(void *object, unsigned long ip)
end_report(&flags);
}
+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);
+}
+
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:[~2021-01-22 14:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-22 13:59 [PATCH v6 0/4] arm64: ARMv8.5-A: MTE: Add async mode support Vincenzo Frascino
2021-01-22 13:59 ` [PATCH v6 1/4] arm64: mte: Add asynchronous " Vincenzo Frascino
2021-01-22 13:59 ` [PATCH v6 2/4] kasan: Add KASAN mode kernel parameter Vincenzo Frascino
2021-01-22 13:59 ` Vincenzo Frascino [this message]
2021-01-22 13:59 ` [PATCH v6 4/4] arm64: mte: Enable async tag check fault Vincenzo Frascino
2021-01-22 14:09 ` [PATCH v6 0/4] arm64: ARMv8.5-A: MTE: Add async mode support Vincenzo Frascino
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210122135955.30237-4-vincenzo.frascino@arm.com \
--to=vincenzo.frascino@arm.com \
--cc=Branislav.Rankov@arm.com \
--cc=andreyknvl@google.com \
--cc=aryabinin@virtuozzo.com \
--cc=catalin.marinas@arm.com \
--cc=dvyukov@google.com \
--cc=elver@google.com \
--cc=eugenis@google.com \
--cc=glider@google.com \
--cc=kasan-dev@googlegroups.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).