af-packet: fix use after free on config

ASAN did find that afp config was used after free. This was in
fact done in the Flow bypass manager hence this patch.

src/runmode-af-packet.c

@@ -440,10 +440,16 @@ static void *ParseAFPConfig(const char *iface)
                     aconf->iface);
             aconf->flags |= AFP_BYPASS;
             RunModeEnablesBypassManager();
+            struct ebpf_timeout_config *ebt = SCCalloc(1, sizeof(struct ebpf_timeout_config));
+            if (ebt == NULL) {
+                SCLogError(SC_ERR_MEM_ALLOC, "Flow bypass alloc error");
+            } else {
+                memcpy(ebt, &(aconf->ebpf_t_config), sizeof(struct ebpf_timeout_config));
                 BypassedFlowManagerRegisterCheckFunc(EBPFCheckBypassedFlowTimeout,
                                                      NULL,
-                                                 (void *) &(aconf->ebpf_t_config));
+                                                     (void *)ebt);
                 BypassedFlowManagerRegisterUpdateFunc(EBPFUpdateFlow, NULL);
+            }
 #else
             SCLogError(SC_ERR_UNIMPLEMENTED, "Bypass set but eBPF support is not built-in");
 #endif