fuzzers: add fuzzer for config parsers

fuzzers/fuzzer_load.c

@@ -0,0 +1,65 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * mpv 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <unistd.h>
+
+#include <libmpv/client.h>
+
+#include "common.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    if (size == 0)
+        return -1;
+
+    char filename[15 + 10 + 1];
+    sprintf(filename, "/tmp/libfuzzer.%d", getpid());
+
+    FILE *fp = fopen(filename, "wb");
+    if (!fp)
+        exit(1);
+
+    if (fwrite(data, size, 1, fp) != 1)
+        exit(1);
+
+    if (fclose(fp))
+        exit(1);
+
+    mpv_handle *ctx = mpv_create();
+    if (!ctx)
+        exit(1);
+
+    check_error(mpv_set_option_string(ctx, "vo", "null"));
+    check_error(mpv_set_option_string(ctx, "ao", "null"));
+    check_error(mpv_set_option_string(ctx, "ao-null-untimed", "yes"));
+    check_error(mpv_set_option_string(ctx, "untimed", "yes"));
+    check_error(mpv_set_option_string(ctx, "video-osd", "no"));
+    check_error(mpv_set_option_string(ctx, "msg-level", "all=trace"));
+
+    check_error(mpv_initialize(ctx));
+
+    const char *cmd[] = {"load-" MPV_LOAD, filename, NULL};
+    check_error(mpv_command(ctx, cmd));
+
+    mpv_terminate_destroy(ctx);
+
+    return 0;
+}

fuzzers/meson.build

@@ -24,3 +24,11 @@ foreach f : ['MPV_FORMAT_STRING', 'MPV_FORMAT_FLAG', 'MPV_FORMAT_INT64', 'MPV_FO
                 link_with: libmpv)
   endforeach
 endforeach
+
+foreach cmd : ['config-file', 'input-conf']
+    executable('fuzzer_load_' + cmd.underscorify(),
+                'fuzzer_load.c',
+                c_args: ['-DMPV_LOAD="' + cmd + '"'],
+                include_directories: incdir,
+                link_with: libmpv)
+endforeach