Patch "security/keys: add CONFIG_KEYS_COMPAT to Kconfig" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

security/keys: add CONFIG_KEYS_COMPAT to Kconfig

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
security-keys-add-config_keys_compat-to-kconfig.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Bilal Amarni <[email protected]>
Date: Thu, 8 Jun 2017 14:47:26 +0100
Subject: security/keys: add CONFIG_KEYS_COMPAT to Kconfig

From: Bilal Amarni <[email protected]>

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]

---
 arch/powerpc/Kconfig  |    5 -----
 arch/s390/Kconfig     |    3 ---
 arch/sparc/Kconfig    |    3 ---
 arch/x86/Kconfig      |    4 ----
 security/keys/Kconfig |    4 ++++
 5 files changed, 4 insertions(+), 15 deletions(-)

@@ -1087,11 +1087,6 @@ 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

@@ -359,9 +359,6 @@ 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"

@@ -568,9 +568,6 @@ config SYSVIPC_COMPAT
 	depends on COMPAT && SYSVIPC
 	default y
 
-config KEYS_COMPAT
-	def_bool y if COMPAT && KEYS
-
 endmenu
 
 source "net/Kconfig"

@@ -2732,10 +2732,6 @@ 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

@@ -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

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/security-keys-add-config_keys_compat-to-kconfig.patch