test: add a fuzzer for the varlink IDL stuff

src/fuzz/fuzz-varlink-idl.c

@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <unistd.h>
+
+#include "errno-util.h"
+#include "fd-util.h"
+#include "fuzz.h"
+#include "io-util.h"
+#include "varlink-idl.h"
+#include "log.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+        _cleanup_(varlink_interface_freep) VarlinkInterface *vi = NULL;
+        _cleanup_free_ char *str = NULL, *dump = NULL;
+        int r;
+
+        log_set_max_level(LOG_CRIT);
+        log_parse_environment();
+        (void) log_open();
+
+        assert_se(str = memdup_suffix0(data, size));
+
+        r = varlink_idl_parse(str, /* line= */ NULL, /* column= */ NULL, &vi);
+        if (r < 0) {
+                log_debug_errno(r, "Failed to parse varlink interface definition: %m");
+                return 0;
+        }
+
+        assert_se(varlink_idl_format(vi, &dump) >= 0);
+        (void) varlink_idl_consistent(vi, LOG_DEBUG);
+
+        return 0;
+}

src/fuzz/meson.build

@@ -12,4 +12,5 @@ simple_fuzzers += files(
         'fuzz-time-util.c',
         'fuzz-udev-database.c',
         'fuzz-varlink.c',
+        'fuzz-varlink-idl.c',
 )

test/fuzz/fuzz-varlink-idl/interface1

@@ -0,0 +1,100 @@
+# https://varlink.org/Interface-Definition
+interface org.foo.bar
+
+type MyOtherType(
+    x: T
+)
+
+type T ( x: TT )
+type TT ( x: TTT )
+type TTT ( x: TTTT )
+type TTTT ( x: TTTTT )
+type TTTTT ( x: TTTTTT )
+type TTTTTT ( x: TTTTTTT )
+type TTTTTTT ( x: TTTTTTTT )
+type TTTTTTTT ( x: TTTTTTTTT )
+type TTTTTTTTT ( x: TTTTTTTTTT )
+type TTTTTTTTTT ( x: TTTTTTTTTTT )
+type TTTTTTTTTTT ( x: TTTTTTTTTTTT )
+type TTTTTTTTTTTT ( x: TTTTTTTTTTTTT )
+type TTTTTTTTTTTTT ( x: TTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT )
+type TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ( x: bool )
+
+type MyType (
+    example_bool: bool,
+    example_int: int,
+    example_float: float,
+    example_string: string,
+    example_object: object,
+    example_enum_single: (one),
+    example_enum: (one, two, three),
+    example_struct_single: (first: int),
+    example_struct: (first: int, second: string),
+    example_array: []string,
+    example_dictionary: [string]string,
+    example_stringset: [string](a, b, c),
+    example_stringset2: [string](a: int, b: bool, c: object),
+    example_nullable: ?string,
+    example_nullable_array_struct: ?[](first: int, second: string),
+    example_other_type: MyOtherType
+)
+
+method Foo(a: int, b: MyType) -> (bar: []string, baz: float, more: (i: int, f: float, s: string))
+method VoidArgs() -> (a: int)
+method VoidRet(a: int) -> ()
+method Void() -> ()
+
+error UnknownAction(action: string, more_data: ?string)
+error VoidError()