tree 931135d5d5cf00255d596520bd59c4067d669c22
parent a85d6b8242dc78ef3f4542a0f979aebcbe77fc4e
author Kees Cook <keescook@chromium.org> 1473267274 -0700
committer Kees Cook <keescook@chromium.org> 1473273206 -0700

usercopy: remove page-spanning test for now

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: f5509cc18daa ("mm: Hardened usercopy")
Signed-off-by: Kees Cook <keescook@chromium.org>