From: Jiri Kosina <jikos@kernel.org>
To: Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Alexander Potapenko <glider@google.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: kasan-dev@googlegroups.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, jslaby@suse.cz
Subject: [PATCH] kasan: distinguish kasan report from generic BUG()
Date: Wed, 24 Nov 2021 18:41:49 +0100 (CET) [thread overview]
Message-ID: <nycvar.YFH.7.76.2111241839590.16505@cbobk.fhfr.pm> (raw)
From: Jiri Kosina <jkosina@suse.cz>
The typical KASAN report always begins with
BUG: KASAN: ....
in kernel log. That 'BUG:' prefix creates a false impression that it's an
actual BUG() codepath being executed, and as such things like
'panic_on_oops' etc. would work on it as expected; but that's obviously
not the case.
Switch the order of prefixes to make this distinction clear and avoid
confusion.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
mm/kasan/report.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 0bc10f452f7e..ead714c844e9 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -86,7 +86,7 @@ __setup("kasan_multi_shot", kasan_set_multi_shot);
static void print_error_description(struct kasan_access_info *info)
{
- pr_err("BUG: KASAN: %s in %pS\n",
+ pr_err("KASAN: BUG: %s in %pS\n",
kasan_get_bug_type(info), (void *)info->ip);
if (info->access_size)
pr_err("%s of size %zu at addr %px by task %s/%d\n",
@@ -366,7 +366,7 @@ void kasan_report_invalid_free(void *object, unsigned long ip)
#endif /* IS_ENABLED(CONFIG_KUNIT) */
start_report(&flags);
- pr_err("BUG: KASAN: double-free or invalid-free in %pS\n", (void *)ip);
+ pr_err("KASAN: BUG: double-free or invalid-free in %pS\n", (void *)ip);
kasan_print_tags(tag, object);
pr_err("\n");
print_address_description(object, tag);
@@ -386,7 +386,7 @@ void kasan_report_async(void)
#endif /* IS_ENABLED(CONFIG_KUNIT) */
start_report(&flags);
- pr_err("BUG: KASAN: invalid-access\n");
+ pr_err("KASAN: BUG: invalid-access\n");
pr_err("Asynchronous mode enabled: no access details available\n");
pr_err("\n");
dump_stack_lvl(KERN_ERR);
--
Jiri Kosina
SUSE Labs
next reply other threads:[~2021-11-24 17:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-24 17:41 Jiri Kosina [this message]
2021-11-24 18:04 ` [PATCH] kasan: distinguish kasan report from generic BUG() Jiri Slaby
2021-11-24 18:06 ` Marco Elver
2021-11-25 7:15 ` Dmitry Vyukov
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