security/keys: add CONFIG_KEYS_COMPAT to Kconfig

commit 47b2c3fff4932e6fc17ce13d51a43c6969714e20 upstream.

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@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
cc: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Cc: James Cowgill <james.cowgill@mips.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index db49e0d..dfb1ee8 100644 (file)
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -1082,11 +1082,6 @@ 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 3a55f49..5ad7b72 100644 (file)
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -346,9 +346,6 @@ 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 eb94874..94f4ac2 100644 (file)
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -549,9 +549,6 @@ 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 436639a..7e40905 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2641,10 +2641,6 @@ 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 72483b8..1edb37e 100644 (file)
--- 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