Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 00a14294 authored by Paul Lawrence's avatar Paul Lawrence Committed by Linus Torvalds
Browse files

kasan: add tests for alloca poisoning 

Link: http://lkml.kernel.org/r/20171204191735.132544-5-paullawrence@google.com


Signed-off-by: default avatarGreg Hackmann <ghackmann@google.com>
Signed-off-by: default avatarPaul Lawrence <paullawrence@google.com>
Acked-by: default avatarAndrey 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 342061ee

lib/test_kasan.c

+22 −0
Original line number Diff line number Diff line
@@ -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();