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authorKees Cook <keescook@chromium.org>2017-06-14 16:12:04 -0700
committerKees Cook <keescook@chromium.org>2018-01-15 12:08:08 -0800
commit6d07d1cd300f4c7e16005f881fea388164999cc8 (patch)
treea2c4b8ce388b98f0cc1054ac59c42f4536920678 /mm/slab_common.c
parent51776043afa415435c7e4636204fbe4f7edc4501 (diff)
usercopy: Restrict non-usercopy caches to size 0
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: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'mm/slab_common.c')
-rw-r--r--mm/slab_common.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 8ac2a6320a6c..d00cd3f0f8ac 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -532,7 +532,7 @@ struct kmem_cache *
kmem_cache_create(const char *name, size_t size, size_t align,
slab_flags_t flags, void (*ctor)(void *))
{
- return kmem_cache_create_usercopy(name, size, align, flags, 0, size,
+ return kmem_cache_create_usercopy(name, size, align, flags, 0, 0,
ctor);
}
EXPORT_SYMBOL(kmem_cache_create);