From 0a100f4c1c1484752423ec538a26533eef5b5d24 Mon Sep 17 00:00:00 2001
From: Thomas Orgis <ich@sobukus.de>
Date: Wed, 31 Jul 2019 21:57:00 +0200
Subject: [PATCH] [mpg123] silence library error messages (#2642)

* mpg123/read_fuzzer: disable error messages from libmpg123

This shall remove any error messages libmpg123 prints out during fuzzing,
leaving only the crash trace at the inevitable end.
---
 projects/mpg123/decode_fuzzer.cc | 4 +++-
 projects/mpg123/read_fuzzer.c    | 3 ++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/projects/mpg123/decode_fuzzer.cc b/projects/mpg123/decode_fuzzer.cc
index 56006be9a..0f0e662f1 100644
--- a/projects/mpg123/decode_fuzzer.cc
+++ b/projects/mpg123/decode_fuzzer.cc
@@ -19,7 +19,9 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     return 0;
   }
 
-  ret = mpg123_open_feed(handle);
+  ret = mpg123_param(handle, MPG123_ADD_FLAGS, MPG123_QUIET, 0.);
+  if(ret == MPG123_OK)
+    ret = mpg123_open_feed(handle);
   if (ret != MPG123_OK) {
     mpg123_delete(handle);
     return 0;
diff --git a/projects/mpg123/read_fuzzer.c b/projects/mpg123/read_fuzzer.c
index f65871608..75e9275c0 100644
--- a/projects/mpg123/read_fuzzer.c
+++ b/projects/mpg123/read_fuzzer.c
@@ -63,7 +63,8 @@ int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
   int error;
   mpg123_handle* handle = mpg123_new(NULL, &error);
-  if (handle == NULL) {
+  if (handle == NULL || mpg123_param(handle,
+      MPG123_ADD_FLAGS, MPG123_QUIET, 0.) != MPG123_OK) {
     free(outmemory);
     fuzzer_release_tmpfile(filename);
     return 0;