c
// Introduce a flag to track the state of kbuffer.
bool kbuffer_valid = true;

18 	ret = create_gpadl_header(type, kbuffer, size, send_offset, &msginfo);
19 	if (ret) {
20 		kbuffer_valid = false; // kbuffer is no longer valid.
21 		return ret;
22 	}

// Later in the code, check the flag before using kbuffer.
if (kbuffer_valid) {
    // Safe to use kbuffer here.
}
