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[PATCH v4 6/7] kasan: Test fix: Warn if the UAF could not be detected in kmalloc_uaf2

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  [PATCH v4 6/7] kasan: Test fix: Warn if the UAF could not be detected in kmalloc_uaf2 Alexander Potapenko <glider@google.com> - 2016-02-26 17:50 +0100
    Re: [PATCH v4 6/7] kasan: Test fix: Warn if the UAF could not be  detected in kmalloc_uaf2 Andrey Ryabinin <ryabinin.a.a@gmail.com> - 2016-02-29 17:40 +0100

#1344450 — [PATCH v4 6/7] kasan: Test fix: Warn if the UAF could not be detected in kmalloc_uaf2

Signed-off-by: Alexander Potapenko <glider@google.com>
---
 lib/test_kasan.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index 90ad74f..82169fb 100644
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -294,6 +294,8 @@ static noinline void __init kmalloc_uaf2(void)
 	}
 
 	ptr1[40] = 'x';
+	if (ptr1 == ptr2)
+		pr_err("Could not detect use-after-free: ptr1 == ptr2\n");
 	kfree(ptr2);
 }
 
-- 
2.7.0.rc3.207.g0ac5344

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#1345974 — Re: [PATCH v4 6/7] kasan: Test fix: Warn if the UAF could not be detected in kmalloc_uaf2

On 02/26/2016 07:48 PM, Alexander Potapenko wrote:
> Signed-off-by: Alexander Potapenko <glider@google.com>
> ---
>  lib/test_kasan.c | 2 ++
>  1 file changed, 2 insertions(+)
> 

Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>

> diff --git a/lib/test_kasan.c b/lib/test_kasan.c
> index 90ad74f..82169fb 100644
> --- a/lib/test_kasan.c
> +++ b/lib/test_kasan.c
> @@ -294,6 +294,8 @@ static noinline void __init kmalloc_uaf2(void)
>  	}
>  
>  	ptr1[40] = 'x';
> +	if (ptr1 == ptr2)
> +		pr_err("Could not detect use-after-free: ptr1 == ptr2\n");
>  	kfree(ptr2);
>  }
>  
> 

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