A custom allocator without __GFP_COMP that copies to userspace has been found in vmw_execbuf_process[1], so this disables the page-span checker by placing it behind a CONFIG for future work where such things can be tracked down later. [1] https://bugzilla.redhat.com/show_bug.cgi?id=1373326 Reported-by: Vinson Lee <vlee@freedesktop.org> Fixes:f5509cc18d("mm: Hardened usercopy") Signed-off-by: Kees Cook <keescook@chromium.org> Change-Id: I4177c0fb943f14a5faf5c70f5e54bf782c316f43 (cherry picked from commit8e1f74ea02) Signed-off-by: Sami Tolvanen <samitolvanen@google.com>