depending on which allocator (SLAB or SLUB) is being used
Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx>
---
lib/test_kasan.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index c32f3b0..66dd92f 100644
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -68,7 +68,22 @@ static noinline void __init kmalloc_node_oob_right(void)
static noinline void __init kmalloc_large_oob_right(void)
{
char *ptr;
- size_t size = KMALLOC_MAX_CACHE_SIZE + 10;
+ size_t size;
+
+ if (KMALLOC_MAX_CACHE_SIZE == KMALLOC_MAX_SIZE) {
+ /*
+ * We're using the SLAB allocator. Allocate a chunk that fits
+ * into a slab.
+ */
+ size = KMALLOC_MAX_CACHE_SIZE - 256;
+ } else {
+ /*
+ * KMALLOC_MAX_SIZE > KMALLOC_MAX_CACHE_SIZE.
+ * We're using the SLUB allocator. Allocate a chunk that does
+ * not fit into a slab to trigger the page allocator.
+ */
+ size = KMALLOC_MAX_CACHE_SIZE + 10;
+ }
pr_info("kmalloc large allocation: out-of-bounds to right\n");
ptr = kmalloc(size, GFP_KERNEL);
--
2.7.0.rc3.207.g0ac5344
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