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| author | Kees Cook <keescook@chromium.org> | 2017-06-14 16:12:04 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2018-01-15 12:08:08 -0800 |
| commit | 6d07d1cd300f4c7e16005f881fea388164999cc8 (patch) | |
| tree | a2c4b8ce388b98f0cc1054ac59c42f4536920678 /mm/slab_common.c | |
| parent | 51776043afa415435c7e4636204fbe4f7edc4501 (diff) | |
| download | lwn-6d07d1cd300f4c7e16005f881fea388164999cc8.tar.gz lwn-6d07d1cd300f4c7e16005f881fea388164999cc8.zip | |
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.c | 2 |
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); |