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authorPaul Lawrence <paullawrence@google.com>2018-02-06 15:36:16 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-02-06 18:32:42 -0800
commit00a14294bb33af533f7ac002fb20623fdd8ea0d7 (patch)
treee592ca6fee0644e4d28ce9cb99880f8468e78554 /lib/test_kasan.c
parent342061ee4ef3d80001d1ae494378f3979c861dba (diff)
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kasan: add tests for alloca poisoning
Link: http://lkml.kernel.org/r/20171204191735.132544-5-paullawrence@google.com Signed-off-by: Greg Hackmann <ghackmann@google.com> Signed-off-by: Paul Lawrence <paullawrence@google.com> Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/test_kasan.c')
-rw-r--r--lib/test_kasan.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index ef1a3ac1397e..2724f86c4cef 100644
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -472,6 +472,26 @@ static noinline void __init use_after_scope_test(void)
p[1023] = 1;
}
+static noinline void __init kasan_alloca_oob_left(void)
+{
+ volatile int i = 10;
+ char alloca_array[i];
+ char *p = alloca_array - 1;
+
+ pr_info("out-of-bounds to left on alloca\n");
+ *(volatile char *)p;
+}
+
+static noinline void __init kasan_alloca_oob_right(void)
+{
+ volatile int i = 10;
+ char alloca_array[i];
+ char *p = alloca_array + i;
+
+ pr_info("out-of-bounds to right on alloca\n");
+ *(volatile char *)p;
+}
+
static int __init kmalloc_tests_init(void)
{
/*
@@ -502,6 +522,8 @@ static int __init kmalloc_tests_init(void)
memcg_accounted_kmem_cache();
kasan_stack_oob();
kasan_global_oob();
+ kasan_alloca_oob_left();
+ kasan_alloca_oob_right();
ksize_unpoisons_memory();
copy_user_test();
use_after_scope_test();