Try disabling CONFIG_HARDENED_USERCOPY_PAGESPAN.
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8e1f74ea02cf4562404c48c6882214821552c13f
Try disabling CONFIG_ HARDENED_ USERCOPY_ PAGESPAN.
http:// git.kernel. org/cgit/ linux/kernel/ git/torvalds/ linux.git/ commit/ ?id=8e1f74ea02c f4562404c48c688 2214821552c13f