Hi Greg,
This was not marked for stable but it fixes a commit which has been backported to 4.14-stable.
1) 5b06bbcfc2c6 fixes ca37e57bbe0c 2) 7ee18d677989 will again fix 5b06bbcfc2c6
But you will need to add: 090edbe23ff5 ("x86/power/64: Use struct desc_ptr for the IDT in struct saved_context") and 896c80bef4d3 ("x86/power/32: Move SYSENTER MSR restoration to fix_processor_context()") to apply 7ee18d677989.
All of them are attached to this mail for you.
-- Regards Sudip