Hello. Ye ilho wrote: > err = sys_getsockname(a0,(struct sockaddr __user *)a1, (int __user *)a[2]); Verify sys_getsockname() has succeeded because printing *a1 is meaningless if sys_getsockname() has failed. > #define ILHO_IP_NUMS(x) (x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, (x)>>24 Why not use NIPQUAD or HIPQUAD macro? > struct sockaddr_in *name = (struct sockaddr __user*)a1; Verify the address type is AF_INET because all address types (for example, AF_INET6) can be passed to this socket syscall. Printing in_addr field of AF_INET address is valid, but printing in_addr field of non-AF_INET address is invalid. You can't access *a1 directly because it is __user area. You need to use copy_from_user() to read *a1. Better place to insert your code may be in the sys_getsockname(). Thanks. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
