From f4957d5bd09165b165df851fbf8c658f7fcd9922 Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Thu, 5 Apr 2018 16:20:37 -0700 Subject: slab: make kmem_cache_create() work with 32-bit sizes struct kmem_cache::size and ::align were always 32-bit. Out of curiosity I created 4GB kmem_cache, it oopsed with division by 0. kmem_cache_create(1UL<<32+1) created 1-byte cache as expected. size_t doesn't work and never did. Link: http://lkml.kernel.org/r/20180305200730.15812-6-adobriyan@gmail.com Signed-off-by: Alexey Dobriyan Cc: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/slab.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/slab.h b/include/linux/slab.h index ad157fbf3886..d36e8f03730e 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -137,11 +137,12 @@ bool slab_is_available(void); extern bool usercopy_fallback; -struct kmem_cache *kmem_cache_create(const char *name, size_t size, - size_t align, slab_flags_t flags, +struct kmem_cache *kmem_cache_create(const char *name, unsigned int size, + unsigned int align, slab_flags_t flags, void (*ctor)(void *)); struct kmem_cache *kmem_cache_create_usercopy(const char *name, - size_t size, size_t align, slab_flags_t flags, + unsigned int size, unsigned int align, + slab_flags_t flags, size_t useroffset, size_t usersize, void (*ctor)(void *)); void kmem_cache_destroy(struct kmem_cache *); -- cgit v1.2.3