Hi, Is it possible to apply this commit to the stable trees before 4.12? commit 47b2c3fff4932e6fc17ce13d51a43c6969714e20 Author: Bilal Amarni <bilal.amarni@xxxxxxxxx> Date: Thu Jun 8 14:47:26 2017 +0100 security/keys: add CONFIG_KEYS_COMPAT to Kconfig In commit 20f06ed9f61a ("KEYS: 64-bit MIPS needs to use compat_sys_keyctl for 32-bit userspace"), the keyctl syscall for 32-bit MIPS was "fixed" to point at compat_sys_keyctl instead of sys_keyctl. Unfortunately this caused the syscall to always return ENOSYS because CONFIG_KEYS_COMPAT was not enabled on MIPS. Instead of fixing this by manually by enabling KEYS_COMPAT in the MIPS Kconfig, I think applying the above commit is a better. Thanks, James