diff options
| author | David Windsor <dave@nullcore.net> | 2017-06-10 22:50:47 -0400 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2018-01-15 12:07:49 -0800 |
| commit | 6c0c21adc742a255f0203ef76ef0ed6c8c3b0630 (patch) | |
| tree | ed1261caefae3fedeb6c065c056101d7e4787e15 /mm/slab.h | |
| parent | 2d891fbc3bb681ba1f826e7ee70dbe38ca7465fe (diff) | |
usercopy: Mark kmalloc caches as usercopy caches
Mark the kmalloc slab caches as entirely whitelisted. These caches
are frequently used to fulfill kernel allocations that contain data
to be copied to/from userspace. Internal-only uses are also common,
but are scattered in the kernel. For now, mark all the kmalloc caches
as whitelisted.
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.
Signed-off-by: David Windsor <dave@nullcore.net>
[kees: merged in moved kmalloc hunks, adjust commit log]
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
Cc: linux-xfs@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Christoph Lameter <cl@linux.com>
Diffstat (limited to 'mm/slab.h')
| -rw-r--r-- | mm/slab.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/slab.h b/mm/slab.h index 8f3030788e01..1f013f7795c6 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -97,7 +97,8 @@ struct kmem_cache *kmalloc_slab(size_t, gfp_t); int __kmem_cache_create(struct kmem_cache *, slab_flags_t flags); extern struct kmem_cache *create_kmalloc_cache(const char *name, size_t size, - slab_flags_t flags); + slab_flags_t flags, size_t useroffset, + size_t usersize); extern void create_boot_cache(struct kmem_cache *, const char *name, size_t size, slab_flags_t flags, size_t useroffset, size_t usersize); |