linux-kernel - Re: [PATCH v5 6/6] kasan: Forbid kunit tests when async mode is enabled

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Message-ID: <1586f5ed-c70d-ceb1-88c4-803ea8674dc0@arm.com>
Date:   Fri, 22 Jan 2021 11:26:51 +0000
From:   Vincenzo Frascino <vincenzo.frascino@....com>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kasan-dev <kasan-dev@...glegroups.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Marco Elver <elver@...gle.com>,
        Evgenii Stepanov <eugenis@...gle.com>,
        Branislav Rankov <Branislav.Rankov@....com>
Subject: Re: [PATCH v5 6/6] kasan: Forbid kunit tests when async mode is
 enabled


On 1/21/21 5:40 PM, Andrey Konovalov wrote:
>> diff --git a/lib/test_kasan.c b/lib/test_kasan.c
>> index 7285dcf9fcc1..1306f707b4fe 100644
>> --- a/lib/test_kasan.c
>> +++ b/lib/test_kasan.c
>> @@ -52,6 +52,11 @@ static int kasan_test_init(struct kunit *test)
>>                 return -1;
>>         }
>>
>> +       if (!hw_is_mode_sync()) {
>> +               kunit_err(test, "can't run KASAN tests in async mode");
>> +               return -1;
>> +       }
> I'd rather implement this check at the KASAN level, than in arm64
> code. Just the way kasan_stack_collection_enabled() is implemented.
> 
> Feel free to drop this change and the previous patch, I'll implement
> this myself later.
> 

Fine by me, will drop 5 and 6 in v5.

-- 
Regards,
Vincenzo