From: Arne Fitzenreiter <arne_f@ipfire.org>
To: development@lists.ipfire.org
Subject: Re: [PATCH] kernel: enable CONFIG_GCC_PLUGIN_STACKLEAK
Date: Wed, 10 Jun 2020 16:48:10 +0200 [thread overview]
Message-ID: <319464f1eaa5228b191c6cd742388713@ipfire.org> (raw)
In-Reply-To: <A170CED1-4CCA-4C05-8EA7-0D10B78D3C86@ipfire.org>
[-- Attachment #1: Type: text/plain, Size: 3474 bytes --]
This option not exist in kernel 4.14!!! It was added with kernel 5.2
Arne
Am 2020-06-10 10:28, schrieb Michael Tremer:
> Hi,
>
>> On 9 Jun 2020, at 18:53, Peter Müller <peter.mueller(a)ipfire.org>
>> wrote:
>>
>> Quoted from
>> https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project/Recommended_Settings:
>>
>>> # Wipe stack contents on syscall exit (reduces stale data lifetime in
>>> stack)
>>> CONFIG_GCC_PLUGIN_STACKLEAK=y
>>
>> Not sure what performance penalities this introduces in real life...
>
> Well, should we not find out before we make this generally available
> for all users?
>
> -Michael
>
>>
>> Fixes: #12382
>>
>> Cc: Arne Fitzenreiter <arne.fitzenreiter(a)ipfire.org>
>> Signed-off-by: Peter Müller <peter.mueller(a)ipfire.org>
>> ---
>> config/kernel/kernel.config.aarch64-ipfire | 1 +
>> config/kernel/kernel.config.armv5tel-ipfire-multi | 1 +
>> config/kernel/kernel.config.i586-ipfire | 1 +
>> config/kernel/kernel.config.x86_64-ipfire | 1 +
>> 4 files changed, 4 insertions(+)
>>
>> diff --git a/config/kernel/kernel.config.aarch64-ipfire
>> b/config/kernel/kernel.config.aarch64-ipfire
>> index e0f2f6df8..f4240e0ae 100644
>> --- a/config/kernel/kernel.config.aarch64-ipfire
>> +++ b/config/kernel/kernel.config.aarch64-ipfire
>> @@ -256,6 +256,7 @@ CONFIG_HAVE_GCC_PLUGINS=y
>> CONFIG_GCC_PLUGINS=y
>> # CONFIG_GCC_PLUGIN_CYC_COMPLEXITY is not set
>> CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y
>> +CONFIG_GCC_PLUGIN_STACKLEAK=y
>> CONFIG_GCC_PLUGIN_STRUCTLEAK=y
>> CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL=y
>> # CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE is not set
>> diff --git a/config/kernel/kernel.config.armv5tel-ipfire-multi
>> b/config/kernel/kernel.config.armv5tel-ipfire-multi
>> index 15183300f..2bcfbdbdd 100644
>> --- a/config/kernel/kernel.config.armv5tel-ipfire-multi
>> +++ b/config/kernel/kernel.config.armv5tel-ipfire-multi
>> @@ -252,6 +252,7 @@ CONFIG_HAVE_GCC_PLUGINS=y
>> CONFIG_GCC_PLUGINS=y
>> # CONFIG_GCC_PLUGIN_CYC_COMPLEXITY is not set
>> CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y
>> +CONFIG_GCC_PLUGIN_STACKLEAK=y
>> CONFIG_GCC_PLUGIN_STRUCTLEAK=y
>> CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL=y
>> # CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE is not set
>> diff --git a/config/kernel/kernel.config.i586-ipfire
>> b/config/kernel/kernel.config.i586-ipfire
>> index 578931497..a72cde41a 100644
>> --- a/config/kernel/kernel.config.i586-ipfire
>> +++ b/config/kernel/kernel.config.i586-ipfire
>> @@ -283,6 +283,7 @@ CONFIG_HAVE_GCC_PLUGINS=y
>> CONFIG_GCC_PLUGINS=y
>> # CONFIG_GCC_PLUGIN_CYC_COMPLEXITY is not set
>> CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y
>> +CONFIG_GCC_PLUGIN_STACKLEAK=y
>> CONFIG_GCC_PLUGIN_STRUCTLEAK=y
>> CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL=y
>> # CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE is not set
>> diff --git a/config/kernel/kernel.config.x86_64-ipfire
>> b/config/kernel/kernel.config.x86_64-ipfire
>> index 6a5fbbfe9..cd116d780 100644
>> --- a/config/kernel/kernel.config.x86_64-ipfire
>> +++ b/config/kernel/kernel.config.x86_64-ipfire
>> @@ -293,6 +293,7 @@ CONFIG_HAVE_GCC_PLUGINS=y
>> CONFIG_GCC_PLUGINS=y
>> # CONFIG_GCC_PLUGIN_CYC_COMPLEXITY is not set
>> CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y
>> +CONFIG_GCC_PLUGIN_STACKLEAK=y
>> CONFIG_GCC_PLUGIN_STRUCTLEAK=y
>> CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL=y
>> # CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE is not set
>> --
>> 2.26.2
prev parent reply other threads:[~2020-06-10 14:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-09 17:53 Peter Müller
2020-06-10 8:28 ` Michael Tremer
2020-06-10 14:48 ` Arne Fitzenreiter [this message]
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