System crashed when accept() system call is executed.

Issue

• System crashed with following panic message

BUG: unable to handle kernel NULL pointer dereference at virtual address 00000160
..
EIP is at inet_getname+0x41/0x7d
..
Call Trace:
 [<fa80060d>] secure_socket_post_accept+0x138/0x278 [secure_os]
 [<c05a63e7>] sys_accept+0x185/0x1c0
 [<c0403dc9>] copy_thread+0xe7/0x1e6
 [<c0434040>] attach_pid+0x6c/0x98
 [<c04251c8>] copy_process+0xfc2/0x11c9
 [<c041fe3f>] enqueue_task+0x29/0x39
 [<c05a64ca>] sys_socketcall+0xa8/0x19e
 [<c0407eea>] do_syscall_trace+0xab/0xb1
 [<c0404eff>] syscall_call+0x7/0xb