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From 9a6a36b44ad131036fef5c91edc86c842c9821ba 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: Sat, 7 Jul 2018 19:30:25 +0200
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Subject: [PATCH] fuzz-bus-message: add fuzzer for message parsing
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As with other fuzzers, SYSTEMD_FUZZ_OUTPUT=1 and SYSTEMD_LOG_LEVEL=debug can be
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used for debugging.
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(cherry picked from commit 56b560c26339c4b282c06038316a91509eae75fd)
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Resolves: #1696224
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---
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src/fuzz/fuzz-bus-message.c | 47 ++++++++++++++++++++++++++++
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src/fuzz/meson.build | 4 +++
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test/fuzz/fuzz-bus-message/message1 | Bin 0 -> 534 bytes
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3 files changed, 51 insertions(+)
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create mode 100644 src/fuzz/fuzz-bus-message.c
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create mode 100644 test/fuzz/fuzz-bus-message/message1
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diff --git a/src/fuzz/fuzz-bus-message.c b/src/fuzz/fuzz-bus-message.c
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new file mode 100644
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index 0000000000..9842c62a6f
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--- /dev/null
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+++ b/src/fuzz/fuzz-bus-message.c
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@@ -0,0 +1,47 @@
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+/* SPDX-License-Identifier: LGPL-2.1+ */
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+
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+#include <errno.h>
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+#include <stdio.h>
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+
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+#include "alloc-util.h"
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+#include "bus-dump.h"
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+#include "bus-message.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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+
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+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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+ _cleanup_free_ char *out = NULL; /* out should be freed after g */
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+ size_t out_size;
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+ _cleanup_fclose_ FILE *g = NULL;
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+ _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
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+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
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+ _cleanup_free_ void *buffer = NULL;
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+ int r;
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+
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+ /* We don't want to fill the logs with messages about parse errors.
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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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+
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+ r = sd_bus_new(&bus;;
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+ assert_se(r >= 0);
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+
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+ assert_se(buffer = memdup(data, size));
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+
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+ r = bus_message_from_malloc(bus, buffer, size, NULL, 0, NULL, &m);
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+ if (r == -EBADMSG)
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+ return 0;
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+ assert_se(r >= 0);
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+ TAKE_PTR(buffer);
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+
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+ if (getenv_bool("SYSTEMD_FUZZ_OUTPUT") <= 0)
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+ assert_se(g = open_memstream(&out, &out_size));
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+
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+ bus_message_dump(m, g ?: stdout, BUS_MESSAGE_DUMP_WITH_HEADER);
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+
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+ r = sd_bus_message_rewind(m, true);
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+ assert_se(r >= 0);
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+
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+ return 0;
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+}
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diff --git a/src/fuzz/meson.build b/src/fuzz/meson.build
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index 5c81ac0c5b..1dbe28e57e 100644
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--- a/src/fuzz/meson.build
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+++ b/src/fuzz/meson.build
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@@ -1,6 +1,10 @@
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# SPDX-License-Identifier: LGPL-2.1+
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fuzzers += [
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+ [['src/fuzz/fuzz-bus-message.c'],
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+ [libshared],
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+ []],
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+
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[['src/fuzz/fuzz-dns-packet.c',
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dns_type_headers],
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[libsystemd_resolve_core,
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diff --git a/test/fuzz/fuzz-bus-message/message1 b/test/fuzz/fuzz-bus-message/message1
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new file mode 100644
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index 0000000000000000000000000000000000000000..2df70fd7cb6f0e632c4d5c2358091309a5cd3edc
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GIT binary patch
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literal 534
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zcmZ{h!A`?442GSJjTUi2h$EV`OM6*iyZ|>&NW6m6ZC#~`RCNGV2*icg27V{4hLEuI
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z*Z%6nv6IG-c{fDW8PO*Z8RG~@1*A4LLPziq^|n=>fKTCf&ROnOFWhXL{-6KzKQR>*
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zA}kdo{MtXi^_lPUKI=U`x#dhG*Hq0
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zruVss?wLceSE4J#)5yVN0GffvA#~1mm{Zra+=e{w{I&z@*?J#i4Is_HhZ+f`nuHx|
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zld${fh;=jUB)V|NE5y2-nFH%A%GTPz>w(L%415E=fPT+(I2*knx96tO2RVnnVP6o!
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Yuz#WfEX)Cqd!b_JHzYppZsXhk08nC8%>V!Z
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literal 0
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HcmV?d00001
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