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fuzzing: Add push-based discoverer fuzzing target

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Edward Hervey 2017-10-29 08:15:21 +01:00
parent f51f8eea4c
commit 7a4aec73c5
1 changed files with 118 additions and 0 deletions
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fuzzing/gst-discoverer.c Normal file
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/*
* Copyright 2016 Google Inc.
* author: Edward Hervey <bilboed@bilboed.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <locale.h>
#include <stdlib.h>
#include <glib.h>
#include <gst/gst.h>
#include <gst/pbutils/pbutils.h>
GST_PLUGIN_STATIC_DECLARE(coreelements);
GST_PLUGIN_STATIC_DECLARE(playback);
GST_PLUGIN_STATIC_DECLARE(typefindfunctions);
GST_PLUGIN_STATIC_DECLARE(app);
GST_PLUGIN_STATIC_DECLARE(ogg);
GST_PLUGIN_STATIC_DECLARE(theora);
GST_PLUGIN_STATIC_DECLARE(vorbis);
/* push-based discoverer fuzzing target
*
* This application can be compiled with libFuzzer to simulate
* a push-based discoverer execution.
*
* To reproduce the failing behaviour, use:
* $ gst-discoverer-1.0 pushfile:///...
*
* The goal is to cover basic usage of demuxers, parsers and
* base decoder elements.
*
* When compiling, only link the required demuxer/parser/decoder
* plugins and keep it to a limited range (ex: ogg/theora/vorbis)
*
**/
const guint8 *fuzztesting_data;
size_t fuzztesting_size;
static void
appsrc_configuration (GstDiscoverer *dc, GstElement *source, gpointer data)
{
GstBuffer *buf;
GstFlowReturn ret;
/* Create buffer from fuzztesting_data which shouldn't be freed */
buf = gst_buffer_new_wrapped_full (0, (gpointer) fuzztesting_data, fuzztesting_size,
0, fuzztesting_size, NULL, NULL);
g_object_set (G_OBJECT (source), "size", fuzztesting_size, NULL);
g_signal_emit_by_name (G_OBJECT(source), "push-buffer", buf, &ret);
gst_buffer_unref (buf);
}
int LLVMFuzzerTestOneInput(const guint8 *data, size_t size)
{
GError *err = NULL;
GstDiscoverer *dc;
gint timeout = 10;
GstDiscovererInfo *info;
static gboolean initialized = 0;
if (!initialized) {
/* We want critical warnings to assert so we can fix them
* But somehow it's not causing oss-fuzz to crash ... */
g_setenv ("G_DEBUG", "fatal-criticals", TRUE);
/* Only initialize and register plugins once */
gst_init (NULL, NULL);
GST_PLUGIN_STATIC_REGISTER(coreelements);
GST_PLUGIN_STATIC_REGISTER(playback);
GST_PLUGIN_STATIC_REGISTER(typefindfunctions);
GST_PLUGIN_STATIC_REGISTER(app);
GST_PLUGIN_STATIC_REGISTER(ogg);
GST_PLUGIN_STATIC_REGISTER(theora);
GST_PLUGIN_STATIC_REGISTER(vorbis);
}
dc = gst_discoverer_new (timeout * GST_SECOND, &err);
if (G_UNLIKELY (dc == NULL)) {
g_print ("Error initializing: %s\n", err->message);
g_clear_error (&err);
exit (1);
}
fuzztesting_data = data;
fuzztesting_size = size;
/* Connect to source-setup signal to give the data */
g_signal_connect (dc, "source-setup", (GCallback) appsrc_configuration, NULL);
info = gst_discoverer_discover_uri (dc, "appsrc://", &err);
g_clear_error (&err);
if (info)
gst_discoverer_info_unref (info);
g_object_unref (dc);
return 0;
}