[PATCH v1 7/8] kasan: Changed kmalloc_large_oob_right, added kmalloc_pagealloc_oob_right
From: Alexander Potapenko <glider@google.com>
Date: 2016-01-27 18:25:47
Also in:
lkml
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
Signed-off-by: Alexander Potapenko <glider@google.com> --- lib/test_kasan.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index 5498a78..822c804 100644
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c@@ -65,7 +65,8 @@ static noinline void __init kmalloc_node_oob_right(void) kfree(ptr); } -static noinline void __init kmalloc_large_oob_right(void) +#ifdef CONFIG_SLUB +static noinline void __init kmalloc_pagealloc_oob_right(void) { char *ptr; size_t size;
@@ -85,6 +86,18 @@ static noinline void __init kmalloc_large_oob_right(void) size = KMALLOC_MAX_CACHE_SIZE + 10; } + ptr[size] = 0; + kfree(ptr); +} +#endif + +static noinline void __init kmalloc_large_oob_right(void) +{ + char *ptr; + size_t size = KMALLOC_MAX_CACHE_SIZE - 256; + /* Allocate a chunk that is large enough, but still fits into a slab + * and does not trigger the page allocator fallback in SLUB. + */ pr_info("kmalloc large allocation: out-of-bounds to right\n"); ptr = kmalloc(size, GFP_KERNEL); if (!ptr) {
@@ -341,6 +354,9 @@ static int __init kmalloc_tests_init(void) kmalloc_oob_right(); kmalloc_oob_left(); kmalloc_node_oob_right(); +#ifdef CONFIG_SLUB + kmalloc_pagealloc_oob_right(); +#endif kmalloc_large_oob_right(); kmalloc_oob_krealloc_more(); kmalloc_oob_krealloc_less();
--
2.7.0.rc3.207.g0ac5344
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