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ARM: 7888/1: seccomp: not compatible with ARM OABI

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Make sure that seccomp filter won't be built when ARM OABI is in use,
since there is work needed to distinguish calling conventions. Until
that is done (which is likely never since OABI is deprecated), make
sure seccomp filter is unavailable in the OABI world.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Will Drewry <wad@chromium.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Kees Cook 2013-11-09 00:51:56 +01:00 committed by Russell King
parent b02f84671c
commit 9170217510
1 changed files with 6 additions and 1 deletions
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7
arch/arm/Kconfig
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@ -24,7 +24,7 @@ config ARM
select HARDIRQS_SW_RESEND
select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
select HAVE_ARCH_KGDB
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
select HAVE_ARCH_TRACEHOOK
select HAVE_BPF_JIT
select HAVE_CONTEXT_TRACKING
@ -1726,6 +1726,11 @@ config OABI_COMPAT
in memory differs between the legacy ABI and the new ARM EABI
(only for non "thumb" binaries). This option adds a tiny
overhead to all syscalls and produces a slightly larger kernel.
The seccomp filter system will not be available when this is
selected, since there is no way yet to sensibly distinguish
between calling conventions during filtering.
If you know you'll be using only pure EABI user space then you
can say N here. If this option is not selected and you attempt
to execute a legacy ABI binary then the result will be