about kmemcheck on Linux-3.14

about kmemcheck on Linux-3.14

[Zhang, Tianfei]

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Hi all:

I am using linux-3.14 on Android device, want to use kmemcheck.

I write a sample test module, it seems the kmemcheck and slub_debug cannot detect it, any suggestion?

CONFIG_SLUB_DEBUG=y
# CONFIG_COMPAT_BRK is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
CONFIG_SLUB_CPU_PARTIAL=y
CONFIG_HAVE_ARCH_KMEMCHECK=y
CONFIG_KMEMCHECK=y
# CONFIG_KMEMCHECK_DISABLED_BY_DEFAULT is not set
CONFIG_KMEMCHECK_ENABLED_BY_DEFAULT=y
# CONFIG_KMEMCHECK_ONESHOT_BY_DEFAULT is not set
CONFIG_KMEMCHECK_QUEUE_SIZE=64
CONFIG_KMEMCHECK_SHADOW_COPY_SHIFT=5
CONFIG_KMEMCHECK_PARTIAL_OK=y


Best,
tianfei

static int kmem_free_test(void)
{
       char *buf = kmalloc(100, GFP_KERNEL);
       if (buf) {
              kfree(buf);
              *buf = 200;
       *(buf+10) = 'a';
       *(buf +105) = 200;
              printk("you hit a random char\n");
       }
       return 0;
}

static int __init kmem_test_init(void)
{
       kmem_free_test();
       return 0;
}

static void __exit kmem_test_exit(void)
{
}

module_exit(kmem_test_exit);
module_init(kmem_test_init);

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Re: about kmemcheck on Linux-3.14

[Figo.zhang]

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2015-09-25 12:15 GMT+08:00 Zhang, Tianfei <tianfei.zhang@intel.com>:

> Hi all:
>
>
>
> I am using linux-3.14 on Android device, want to use kmemcheck.
>
>
>
> I write a sample test module, it seems the kmemcheck and slub_debug cannot
> detect it, any suggestion?
>
>
>
>
>
it seems some problem on Kmemcheck?

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