• Kees Cook's avatar
    usercopy: Restrict non-usercopy caches to size 0 · 6d07d1cd
    Kees Cook authored
    
    
    With all known usercopied cache whitelists now defined in the
    kernel, switch the default usercopy region of kmem_cache_create()
    to size 0. Any new caches with usercopy regions will now need to use
    kmem_cache_create_usercopy() instead of kmem_cache_create().
    
    This patch is modified from Brad Spengler/PaX Team's PAX_USERCOPY
    whitelisting code in the last public patch of grsecurity/PaX based on my
    understanding of the code. Changes or omissions from the original code are
    mine and don't reflect the original grsecurity/PaX code.
    
    Cc: David Windsor <dave@nullcore.net>
    Cc: Christoph Lameter <cl@linux.com>
    Cc: Pekka Enberg <penberg@kernel.org>
    Cc: David Rientjes <rientjes@google.com>
    Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: linux-mm@kvack.org
    Signed-off-by: default avatarKees Cook <keescook@chromium.org>
    6d07d1cd