gstreamer/fuzzing/gst-discoverer.c

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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>
#ifndef LOCAL_FUZZ_BUILD
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);
#endif
/* 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);
}
static void
custom_logger (const gchar * log_domain,
GLogLevelFlags log_level, const gchar * message, gpointer unused_data)
{
if (log_level & G_LOG_LEVEL_CRITICAL) {
g_printerr ("CRITICAL ERROR : %s\n", message);
abort ();
} else if (log_level & G_LOG_LEVEL_WARNING) {
g_printerr ("WARNING : %s\n", message);
}
}
int
LLVMFuzzerTestOneInput (const guint8 * data, size_t size)
{
GError *err = NULL;
GstDiscoverer *dc;
gint timeout = 10;
GstDiscovererInfo *info;
static gboolean initialized = FALSE;
if (!initialized) {
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/* We want critical warnings to assert so we can fix them */
g_log_set_always_fatal (G_LOG_LEVEL_CRITICAL);
g_log_set_default_handler (custom_logger, NULL);
/* Only initialize and register plugins once */
gst_init (NULL, NULL);
#ifndef LOCAL_FUZZ_BUILD
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);
#endif
initialized = TRUE;
}
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;
}