querying the modules
 

can anyone please tell me watss the error in the following code

size_t *ret, bufsize;
void *buf = (void *)malloc(3000);
query_module(NULL,QM_INFO,buf,bufsize,ret);

its giving me error: EFAULT

It would help a lot to know which language you're programming.
I'll assume C.
First and second lines of the code, you list pointers *ret and *buf.
Third line, you list the memory locations directly, instead of the pointers.