Re: security/keys: add CONFIG_KEYS_COMPAT to Kconfig

From: David Howells
Date: Sat Jun 03 2017 - 04:04:59 EST


Eric Biggers <ebiggers3@xxxxxxxxx> wrote:

> This patch is in the "keys-fixes" branch now, but it doesn't remove KEYS_COMPAT
> from arch/arm64/Kconfig. David, can you fix it? Thanks!

Done. See below.

David
---
commit 90fe15899ffa2f7c6dd9a7c257c840cfbd523aad
Author: Bilal Amarni <bilal.amarni@xxxxxxxxx>
Date: Fri Jun 2 14:29:19 2017 +0100

security/keys: add CONFIG_KEYS_COMPAT to Kconfig

CONFIG_KEYS_COMPAT is defined in arch-specific Kconfigs and is missing for
several 64-bit architectures : mips, parisc, tile.

At the moment and for those architectures, calling in 32-bit userspace the
keyctl syscall would return an ENOSYS error.

This patch moves the CONFIG_KEYS_COMPAT option to security/keys/Kconfig, to
make sure the compatibility wrapper is registered by default for any 64-bit
architecture as long as it is configured with CONFIG_COMPAT.

[DH: Modified to remove arm64 compat enablement also as requested by Eric
Biggers]

Signed-off-by: Bilal Amarni <bilal.amarni@xxxxxxxxx>
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
cc: Eric Biggers <ebiggers3@xxxxxxxxx>

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 3dcd7ec69bca..b2024db225a9 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1084,10 +1084,6 @@ config SYSVIPC_COMPAT
def_bool y
depends on COMPAT && SYSVIPC

-config KEYS_COMPAT
- def_bool y
- depends on COMPAT && KEYS
-
endmenu

menu "Power management options"
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index f7c8f9972f61..83d2e0f43c26 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -1215,11 +1215,6 @@ source "arch/powerpc/Kconfig.debug"

source "security/Kconfig"

-config KEYS_COMPAT
- bool
- depends on COMPAT && KEYS
- default y
-
source "crypto/Kconfig"

config PPC_LIB_RHEAP
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index e161fafb495b..6967addc6a89 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -363,9 +363,6 @@ config COMPAT
config SYSVIPC_COMPAT
def_bool y if COMPAT && SYSVIPC

-config KEYS_COMPAT
- def_bool y if COMPAT && KEYS
-
config SMP
def_bool y
prompt "Symmetric multi-processing support"
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 58243b0d21c0..5bb7a403af02 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -573,9 +573,6 @@ config SYSVIPC_COMPAT
depends on COMPAT && SYSVIPC
default y

-config KEYS_COMPAT
- def_bool y if COMPAT && KEYS
-
endmenu

source "net/Kconfig"
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4ccfacc7232a..0efb4c9497bc 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2776,10 +2776,6 @@ config COMPAT_FOR_U64_ALIGNMENT
config SYSVIPC_COMPAT
def_bool y
depends on SYSVIPC
-
-config KEYS_COMPAT
- def_bool y
- depends on KEYS
endif

endmenu
diff --git a/security/keys/Kconfig b/security/keys/Kconfig
index 6fd95f76bfae..00b7431a8aeb 100644
--- a/security/keys/Kconfig
+++ b/security/keys/Kconfig
@@ -20,6 +20,10 @@ config KEYS

If you are unsure as to whether this is required, answer N.

+config KEYS_COMPAT
+ def_bool y
+ depends on COMPAT && KEYS
+
config PERSISTENT_KEYRINGS
bool "Enable register of persistent per-UID keyrings"
depends on KEYS