chore: add binary for fuzzing the reader library

CMakeLists.txt

@@ -596,6 +596,10 @@ if(WITH_LIBDWARFS AND WITH_FUZZ)
   add_executable(fuzz_mkdwarfs test/fuzz_mkdwarfs.cpp)
   target_link_libraries(fuzz_mkdwarfs PRIVATE mkdwarfs_main dwarfs_test_helpers)
   list(APPEND BINARY_TARGETS fuzz_mkdwarfs)
+
+  add_executable(fuzz_reader test/fuzz_reader.cpp)
+  target_link_libraries(fuzz_reader PRIVATE dwarfs_reader)
+  list(APPEND BINARY_TARGETS fuzz_reader)
 endif()
 
 foreach(tgt ${LIBDWARFS_TARGETS})

test/fuzz_reader.cpp

@@ -0,0 +1,57 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/**
+ * \author     Marcus Holland-Moritz (github@mhxnet.de)
+ * \copyright  Copyright (c) Marcus Holland-Moritz
+ *
+ * This file is part of dwarfs.
+ *
+ * dwarfs is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * dwarfs is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with dwarfs.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <iostream>
+#include <sstream>
+
+#include <dwarfs/logger.h>
+#include <dwarfs/os_access_generic.h>
+#include <dwarfs/reader/filesystem_options.h>
+#include <dwarfs/reader/filesystem_v2.h>
+#include <dwarfs/reader/fsinfo_options.h>
+
+using namespace dwarfs;
+
+int main(int argc, char** argv) {
+  if (argc < 2) {
+    return 1;
+  }
+
+  // stream_logger lgr(std::cerr);
+  null_logger lgr;
+  os_access_generic os;
+
+#ifdef __AFL_LOOP
+  while (__AFL_LOOP(10000))
+#endif
+  {
+    try {
+      std::ostringstream oss;
+      reader::filesystem_v2 fs(lgr, os, argv[1],
+                               {.metadata = {.check_consistency = true}});
+      fs.dump(oss, {.features = reader::fsinfo_features::all()});
+    } catch (std::exception const& e [[maybe_unused]]) {
+      // std::cerr << "Exception: " << e.what() << "\n";
+    }
+  }
+
+  return 0;
+}