From 7f7e8647fa94b9d126cb88f366740f2b50b1f864 Mon Sep 17 00:00:00 2001
From: Zhanglong Xia <zhanglongxia@google.com>
Date: Thu, 6 Jul 2023 13:37:56 +0800
Subject: [PATCH] fix the Thread Network fuzz testing error

The current fuzz testing comunicates with the Thread radio chip
simulation program `ot-rcp`. The 'ot-rcp' is not installed by all
devices, which causes the fuzz testing program is unable to find
the program '/vendor/bin/ot-rcp'.

This commit enables the HAL to talk to the '/dev/null' to avoid
'/vendor/bin/ot-rcp' not being found.

Bug: 289627270
Test: Run the fuzz test on cuttlefish
Change-Id: If410d7d75abe05c7c2d2c82fa0450e925b9a48bb
---
 threadnetwork/aidl/default/Android.bp | 1 -
 threadnetwork/aidl/default/fuzzer.cpp | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/threadnetwork/aidl/default/Android.bp b/threadnetwork/aidl/default/Android.bp
index 736e808b49..49982f30ea 100644
--- a/threadnetwork/aidl/default/Android.bp
+++ b/threadnetwork/aidl/default/Android.bp
@@ -77,7 +77,6 @@ cc_fuzz {
         "fuzzer.cpp",
     ],
 
-    required: ["ot-rcp"],
     fuzz_config: {
         cc: [
             "zhanglongxia@google.com",
diff --git a/threadnetwork/aidl/default/fuzzer.cpp b/threadnetwork/aidl/default/fuzzer.cpp
index 512708daf4..fb6e5489bc 100644
--- a/threadnetwork/aidl/default/fuzzer.cpp
+++ b/threadnetwork/aidl/default/fuzzer.cpp
@@ -22,7 +22,7 @@ using aidl::android::hardware::threadnetwork::ThreadChip;
 using android::fuzzService;
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-    char url[] = "spinel+hdlc+forkpty:///vendor/bin/ot-rcp?forkpty-arg=2";
+    char url[] = "spinel+hdlc+null:///dev/null";
     auto service = ndk::SharedRefBase::make<ThreadChip>(url);
 
     fuzzService(service->asBinder().get(), FuzzedDataProvider(data, size));