Fixed #TSB-1234 test

ebpftracer/ebpf/l7/l7.c

@@ -307,10 +307,13 @@ void perf_event_batch_output(void *ctx,  struct l7_event *e) {
 //    for (int i = 0; i < e_length; i++) {   //IK:ERROR: IK: BPF stack limit of 512 bytes is exceeded. Please move large on stack variables into BPF per-cpu array map.
 //        *dst++ = *src++;
 //    }
-     *(unsigned int *)dst = *(unsigned int *)src;
-     dst += e_length;
-     src += e_length;
-
+    int remaining_space = e_buff->size - e_buff->len;
+    bpf_printk("IK...perf_event_batch_output...remaining_space=%d", remaining_space);
+    if (remaining_space >= e_length) {
+         *(unsigned int *)dst = *(unsigned int *)src;
+         dst += e_length;
+         src += e_length;
+    }
 
 	// IK: 更新e_buff.
 	// __u32 e_length = sizeof(*e);