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From 3087505025b78b80951ab3a5f496eb255f1a9a21 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Mon, 9 May 2022 10:41:36 +0200
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Subject: [PATCH] fuzz-json: optionally allow logging and output
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Similarly to other fuzzers… this makes development easier.
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(cherry picked from commit 9ad955ce40e244a52984c68ae2a6b151d918b4a8)
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Related: #2087652
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---
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src/fuzz/fuzz-json.c | 19 ++++++++++++++-----
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1 file changed, 14 insertions(+), 5 deletions(-)
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diff --git a/src/fuzz/fuzz-json.c b/src/fuzz/fuzz-json.c
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index ad7460c6fd..648a6d441d 100644
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--- a/src/fuzz/fuzz-json.c
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+++ b/src/fuzz/fuzz-json.c
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@@ -1,6 +1,7 @@
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include "alloc-util.h"
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+#include "env-util.h"
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#include "fd-util.h"
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#include "fuzz.h"
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#include "json.h"
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@@ -10,18 +11,26 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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size_t out_size;
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_cleanup_fclose_ FILE *f = NULL, *g = NULL;
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_cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
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+ int r;
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+
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+ /* Disable most logging if not running standalone */
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+ if (!getenv("SYSTEMD_LOG_LEVEL"))
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+ log_set_max_level(LOG_CRIT);
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f = data_to_file(data, size);
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assert_se(f);
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- if (json_parse_file(f, NULL, 0, &v, NULL, NULL) < 0)
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+ r = json_parse_file(f, NULL, 0, &v, NULL, NULL);
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+ if (r < 0) {
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+ log_debug_errno(r, "failed to parse input: %m");
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return 0;
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+ }
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- g = open_memstream_unlocked(&out, &out_size);
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- assert_se(g);
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+ if (getenv_bool("SYSTEMD_FUZZ_OUTPUT") <= 0)
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+ assert_se(g = open_memstream_unlocked(&out, &out_size));
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- json_variant_dump(v, 0, g, NULL);
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- json_variant_dump(v, JSON_FORMAT_PRETTY|JSON_FORMAT_COLOR|JSON_FORMAT_SOURCE, g, NULL);
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+ json_variant_dump(v, 0, g ?: stdout, NULL);
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+ json_variant_dump(v, JSON_FORMAT_PRETTY|JSON_FORMAT_COLOR|JSON_FORMAT_SOURCE, g ?: stdout, NULL);
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return 0;
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}
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