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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>
This commit is contained in:
Paul Lawrence 2018-02-06 15:36:16 -08:00 committed by Linus Torvalds
parent 342061ee4e
commit 00a14294bb
1 changed files with 22 additions and 0 deletions
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22
lib/test_kasan.c
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@ -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();