From: Marco Elver <elver@google.com>
To: Andrey Konovalov <andreyknvl@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>,
Alexander Potapenko <glider@google.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Evgenii Stepanov <eugenis@google.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Branislav Rankov <Branislav.Rankov@arm.com>,
Kevin Brodsky <kevin.brodsky@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 11/20] kasan: add and integrate kasan boot parameters
Date: Fri, 13 Nov 2020 18:52:54 +0100 [thread overview]
Message-ID: <20201113175254.GA3175464@elver.google.com> (raw)
In-Reply-To: <fdf9e3aec8f57ebb2795710195f8aaf79e3b45bd.1605046662.git.andreyknvl@google.com>
On Tue, Nov 10, 2020 at 11:20PM +0100, 'Andrey Konovalov' via kasan-dev wrote:
[...]
> +/* kasan.mode=off/prod/full */
> +static int __init early_kasan_mode(char *arg)
> +{
> + if (!arg)
> + return -EINVAL;
> +
> + if (!strcmp(arg, "off"))
> + kasan_arg_mode = KASAN_ARG_MODE_OFF;
> + else if (!strcmp(arg, "prod"))
> + kasan_arg_mode = KASAN_ARG_MODE_PROD;
> + else if (!strcmp(arg, "full"))
> + kasan_arg_mode = KASAN_ARG_MODE_FULL;
> + else
> + return -EINVAL;
> +
> + return 0;
> +}
> +early_param("kasan.mode", early_kasan_mode);
> +
> +/* kasan.stack=off/on */
> +static int __init early_kasan_flag_stacktrace(char *arg)
> +{
> + if (!arg)
> + return -EINVAL;
> +
> + if (!strcmp(arg, "off"))
> + kasan_arg_stacktrace = KASAN_ARG_STACKTRACE_OFF;
> + else if (!strcmp(arg, "on"))
> + kasan_arg_stacktrace = KASAN_ARG_STACKTRACE_ON;
> + else
> + return -EINVAL;
> +
> + return 0;
> +}
> +early_param("kasan.stacktrace", early_kasan_flag_stacktrace);
> +
> +/* kasan.fault=report/panic */
> +static int __init early_kasan_fault(char *arg)
> +{
> + if (!arg)
> + return -EINVAL;
> +
> + if (!strcmp(arg, "report"))
> + kasan_arg_fault = KASAN_ARG_FAULT_REPORT;
> + else if (!strcmp(arg, "panic"))
> + kasan_arg_fault = KASAN_ARG_FAULT_PANIC;
> + else
> + return -EINVAL;
> +
> + return 0;
> +}
[...]
The above could be simplified, see suggestion below.
Thanks,
-- Marco
------ >8 ------
diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c
index c91f2c06ecb5..71fc481ad21d 100644
--- a/mm/kasan/hw_tags.c
+++ b/mm/kasan/hw_tags.c
@@ -64,10 +64,8 @@ static int __init early_kasan_mode(char *arg)
kasan_arg_mode = KASAN_ARG_MODE_PROD;
else if (!strcmp(arg, "full"))
kasan_arg_mode = KASAN_ARG_MODE_FULL;
- else
- return -EINVAL;
- return 0;
+ return -EINVAL;
}
early_param("kasan.mode", early_kasan_mode);
@@ -81,10 +79,8 @@ static int __init early_kasan_flag_stacktrace(char *arg)
kasan_arg_stacktrace = KASAN_ARG_STACKTRACE_OFF;
else if (!strcmp(arg, "on"))
kasan_arg_stacktrace = KASAN_ARG_STACKTRACE_ON;
- else
- return -EINVAL;
- return 0;
+ return -EINVAL;
}
early_param("kasan.stacktrace", early_kasan_flag_stacktrace);
@@ -98,10 +94,8 @@ static int __init early_kasan_fault(char *arg)
kasan_arg_fault = KASAN_ARG_FAULT_REPORT;
else if (!strcmp(arg, "panic"))
kasan_arg_fault = KASAN_ARG_FAULT_PANIC;
- else
- return -EINVAL;
- return 0;
+ return -EINVAL;
}
early_param("kasan.fault", early_kasan_fault);
next prev parent reply other threads:[~2020-11-13 17:53 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-10 22:20 [PATCH v2 00/20] kasan: boot parameters for hardware tag-based mode Andrey Konovalov
2020-11-10 22:20 ` [PATCH v2 01/20] kasan: simplify quarantine_put call site Andrey Konovalov
2020-11-11 16:08 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 02/20] kasan: rename get_alloc/free_info Andrey Konovalov
2020-11-11 16:09 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 03/20] kasan: introduce set_alloc_info Andrey Konovalov
2020-11-11 16:10 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 04/20] kasan, arm64: unpoison stack only with CONFIG_KASAN_STACK Andrey Konovalov
2020-11-11 16:13 ` Marco Elver
2020-11-12 9:51 ` Catalin Marinas
2020-11-12 19:38 ` Andrey Konovalov
2020-11-10 22:20 ` [PATCH v2 05/20] kasan: allow VMAP_STACK for HW_TAGS mode Andrey Konovalov
2020-11-11 16:20 ` Marco Elver
2020-11-12 0:24 ` Andrey Konovalov
2020-11-12 10:31 ` Catalin Marinas
2020-11-10 22:20 ` [PATCH v2 06/20] kasan: remove __kasan_unpoison_stack Andrey Konovalov
2020-11-11 16:42 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 07/20] kasan: inline kasan_reset_tag for tag-based modes Andrey Konovalov
2020-11-11 16:54 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 08/20] kasan: inline random_tag for HW_TAGS Andrey Konovalov
2020-11-11 17:02 ` Marco Elver
2020-11-12 0:21 ` Andrey Konovalov
2020-11-10 22:20 ` [PATCH v2 09/20] kasan: inline kasan_poison_memory and check_invalid_free Andrey Konovalov
2020-11-11 17:50 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 10/20] kasan: inline and rename kasan_unpoison_memory Andrey Konovalov
2020-11-11 17:49 ` Marco Elver
2020-11-12 19:45 ` Andrey Konovalov
2020-11-12 19:52 ` Marco Elver
2020-11-12 20:54 ` Andrey Konovalov
2020-11-12 22:20 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 11/20] kasan: add and integrate kasan boot parameters Andrey Konovalov
2020-11-11 18:29 ` Marco Elver
2020-11-12 19:51 ` Andrey Konovalov
2020-11-12 11:35 ` Catalin Marinas
2020-11-12 11:53 ` Marco Elver
2020-11-12 12:54 ` Catalin Marinas
2020-11-12 19:52 ` Andrey Konovalov
2020-11-13 17:52 ` Marco Elver [this message]
2020-11-13 17:55 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 12/20] kasan, mm: check kasan_enabled in annotations Andrey Konovalov
2020-11-11 14:48 ` Marco Elver
2020-11-12 0:36 ` Andrey Konovalov
2020-11-10 22:20 ` [PATCH v2 13/20] kasan: simplify kasan_poison_kfree Andrey Konovalov
2020-11-11 18:42 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 14/20] kasan, mm: rename kasan_poison_kfree Andrey Konovalov
2020-11-11 18:53 ` Marco Elver
2020-11-12 1:05 ` Andrey Konovalov
2020-11-10 22:20 ` [PATCH v2 15/20] kasan: don't round_up too much Andrey Konovalov
2020-11-11 19:08 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 16/20] kasan: simplify assign_tag and set_tag calls Andrey Konovalov
2020-11-11 19:17 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 17/20] kasan: clarify comment in __kasan_kfree_large Andrey Konovalov
2020-11-11 19:18 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 18/20] kasan: clean up metadata allocation and usage Andrey Konovalov
2020-11-11 23:06 ` Marco Elver
2020-11-12 20:11 ` Andrey Konovalov
2020-11-10 22:20 ` [PATCH v2 19/20] kasan, mm: allow cache merging with no metadata Andrey Konovalov
2020-11-11 15:13 ` Marco Elver
2020-11-12 23:00 ` Andrey Konovalov
2020-11-11 23:27 ` Marco Elver
2020-11-10 22:20 ` [PATCH v2 20/20] kasan: update documentation Andrey Konovalov
2020-11-11 16:03 ` Marco Elver
2020-11-12 0:51 ` Andrey Konovalov
2020-11-10 22:24 ` [PATCH v2 00/20] kasan: boot parameters for hardware tag-based mode Andrey Konovalov
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