about kmemcheck on Linux-3.14

["Zhang, Tianfei" <tianfei.zhang@xxxxxxxxx>]

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);