4.14-stable patches

4.14-stable patches

added patches:
	bpf-do-not-allow-root-to-mangle-valid-pointers.patch
	bpf-ensure-off_reg-has-no-mixed-signed-bounds-for-all-types.patch
	bpf-fix-leakage-of-uninitialized-bpf-stack-under-speculation.patch
	bpf-fix-mask-direction-swap-upon-off-reg-sign-change.patch
	bpf-improve-verifier-error-messages-for-users.patch
	bpf-move-off_reg-into-sanitize_ptr_alu.patch
	bpf-move-sanitize_val_alu-out-of-op-switch.patch
	bpf-no-need-to-simulate-speculative-domain-for-immediates.patch
	bpf-refactor-and-streamline-bounds-check-into-helper.patch
	bpf-rework-ptr_limit-into-alu_limit-and-add-common-error-path.patch
	bpf-selftests-fix-up-some-test_verifier-cases-for-unprivileged.patch
	bpf-tighten-speculative-pointer-arithmetic-mask.patch
	bpf-update-selftests-to-reflect-new-error-states.patch
	bpf-verifier-disallow-pointer-subtraction.patch
	bpf-wrap-aux-data-inside-bpf_sanitize_info-container.patch
	selftests-bpf-fix-test_align.patch
	selftests-bpf-make-dubious-pointer-arithmetic-test-useful.patch