Description of problem: CONFIG_X86_INTEL_MPX is currently disabled in at least the F23 4.2.6-301.fc23.x86_64 kernel config. Version-Release number of selected component (if applicable): 4.2.6-301.fc23.x86_64 How reproducible: 100% Steps to Reproduce: cat /boot/config-4.2.6-301.fc23.x86_64 | grep INTEL_MPX Look for CONFIG_X86_INTEL_MPX=y Actual results: $ cat /boot/config-4.2.6-301.fc23.x86_64 | grep INTEL_MPX # CONFIG_X86_INTEL_MPX is not set Expected results: $ cat /boot/config-4.2.6-301.fc23.x86_64 | grep INTEL_MPX CONFIG_X86_INTEL_MPX=y Additional info: Intel(R) Memory Protection Extensions (Intel(R) MPX) is a new capability introduced into Intel Architecture on Skylake (6th gen Core) processors. Intel MPX provides hardware features that can be used in conjunction with compiler changes to check memory references, for those references whose compile-time normal intentions are usurped at runtime due to buffer overflow or underflow. The Fedora 23 toolchain (gcc, binutils, etc...) and glibc already have MPX support. The kernel is the only component currently missing.
Yeah, this seems fine now. There's a comment in our config hunk about revisiting this when it was possible. That comment was made almost a year ago when it wasn't possible, so thanks for the reminder.
I turned it on in rawhide. It should be in tomorrow's build.
Wow, very cool! Thanks for the super-quick response! Is there any chance of getting it turned on in stock Fedora 23?
I've also enabled it in the branch we're tracking 4.3 in. F23 will inherit that soon. Thanks Dave and Laura.
*********** MASS BUG UPDATE ************** We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 23 kernel bugs. Fedora 23 has now been rebased to 4.7.4-100.fc23. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you have moved on to Fedora 24 or 25, and are still experiencing this issue, please change the version to Fedora 24 or 25. If you experience different issues, please open a new bug report for those.
This got enabled and works in F23.