[PATCH] security: select correct default LSM_MMAP_MIN_ADDR on arm on arm64

[Eric Paris]

Acked-by: Eric Paris <eparis at redhat.com>

On Tue, Feb 4, 2014 at 4:38 AM, Will Deacon <will.deacon at arm.com> wrote:
> On Tue, Feb 04, 2014 at 02:15:32AM +0000, Colin Cross wrote:
>> Binaries compiled for arm may run on arm64 if CONFIG_COMPAT is
>> selected.  Set LSM_MMAP_MIN_ADDR to 32768 if ARM64 && COMPAT to
>> prevent selinux failures launching 32-bit static executables that
>> are mapped at 0x8000.
>>
>> Signed-off-by: Colin Cross <ccross at android.com>
>> ---
>>  security/Kconfig | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/security/Kconfig b/security/Kconfig
>> index e9c6ac724fef..beb86b500adf 100644
>> --- a/security/Kconfig
>> +++ b/security/Kconfig
>> @@ -103,7 +103,7 @@ config INTEL_TXT
>>  config LSM_MMAP_MIN_ADDR
>>       int "Low address space for LSM to protect from user allocation"
>>       depends on SECURITY && SECURITY_SELINUX
>> -     default 32768 if ARM
>> +     default 32768 if ARM || (ARM64 && COMPAT)
>>       default 65536
>>       help
>>         This is the portion of low virtual memory which should be protected
>
> Since ARM64 && COMPAT implies 4k pages, this change looks ok to me.
>
>   Acked-by: Will Deacon <will.deacon at arm.com>
>
> Will
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