lib: test_kasan: add some testcases

Add some out of bounds testcases to test_kasan module.

Signed-off-by: Wang Long <long.wanglong@huawei.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index c1efb1b610179013baf5d662f40f739a5f9abc60..c32f3b0048dc826cdad5d04a3c4d15a7ecbe9645 100644 (file)
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -138,6 +138,71 @@ static noinline void __init kmalloc_oob_16(void)
        kfree(ptr2);
 }
 
+static noinline void __init kmalloc_oob_memset_2(void)
+{
+       char *ptr;
+       size_t size = 8;
+
+       pr_info("out-of-bounds in memset2\n");
+       ptr = kmalloc(size, GFP_KERNEL);
+       if (!ptr) {
+               pr_err("Allocation failed\n");
+               return;
+       }
+
+       memset(ptr+7, 0, 2);
+       kfree(ptr);
+}
+
+static noinline void __init kmalloc_oob_memset_4(void)
+{
+       char *ptr;
+       size_t size = 8;
+
+       pr_info("out-of-bounds in memset4\n");
+       ptr = kmalloc(size, GFP_KERNEL);
+       if (!ptr) {
+               pr_err("Allocation failed\n");
+               return;
+       }
+
+       memset(ptr+5, 0, 4);
+       kfree(ptr);
+}
+
+
+static noinline void __init kmalloc_oob_memset_8(void)
+{
+       char *ptr;
+       size_t size = 8;
+
+       pr_info("out-of-bounds in memset8\n");
+       ptr = kmalloc(size, GFP_KERNEL);
+       if (!ptr) {
+               pr_err("Allocation failed\n");
+               return;
+       }
+
+       memset(ptr+1, 0, 8);
+       kfree(ptr);
+}
+
+static noinline void __init kmalloc_oob_memset_16(void)
+{
+       char *ptr;
+       size_t size = 16;
+
+       pr_info("out-of-bounds in memset16\n");
+       ptr = kmalloc(size, GFP_KERNEL);
+       if (!ptr) {
+               pr_err("Allocation failed\n");
+               return;
+       }
+
+       memset(ptr+1, 0, 16);
+       kfree(ptr);
+}
+
 static noinline void __init kmalloc_oob_in_memset(void)
 {
        char *ptr;
@@ -264,6 +329,10 @@ static int __init kmalloc_tests_init(void)
        kmalloc_oob_krealloc_less();
        kmalloc_oob_16();
        kmalloc_oob_in_memset();
+       kmalloc_oob_memset_2();
+       kmalloc_oob_memset_4();
+       kmalloc_oob_memset_8();
+       kmalloc_oob_memset_16();
        kmalloc_uaf();
        kmalloc_uaf_memset();
        kmalloc_uaf2();