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From 76e2fa8ed4bbee7c625e3b790f2e38a59fffd93d Mon Sep 17 00:00:00 2001
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From: Evgeny Vereshchagin <evvers@ya.ru>
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Date: Fri, 23 Nov 2018 00:27:19 +0100
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Subject: [PATCH] tests: add a fuzzer for server_process_native_file
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(cherry picked from commit a4aa59bae206eebb4703b291147144def5d4bb3e)
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Resolves: #1764560
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---
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src/fuzz/fuzz-journald-native-fd.c | 47 ++++++++++++++++++++++++
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src/fuzz/meson.build | 6 +++
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test/fuzz/fuzz-journald-native-fd/basic | Bin 0 -> 34 bytes
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3 files changed, 53 insertions(+)
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create mode 100644 src/fuzz/fuzz-journald-native-fd.c
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create mode 100644 test/fuzz/fuzz-journald-native-fd/basic
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diff --git a/src/fuzz/fuzz-journald-native-fd.c b/src/fuzz/fuzz-journald-native-fd.c
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new file mode 100644
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index 0000000000..95415d9f85
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--- /dev/null
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+++ b/src/fuzz/fuzz-journald-native-fd.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 "fd-util.h"
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+#include "fileio.h"
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+#include "fs-util.h"
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+#include "fuzz.h"
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+#include "fuzz-journald.h"
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+#include "journald-native.h"
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+#include "memfd-util.h"
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+#include "process-util.h"
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+
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+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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+ Server s;
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+ _cleanup_close_ int sealed_fd = -1, unsealed_fd = -1;
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+ _cleanup_(unlink_tempfilep) char name[] = "/tmp/fuzz-journald-native-fd.XXXXXX";
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+ char *label = NULL;
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+ size_t label_len = 0;
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+ struct ucred ucred;
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+ struct timeval *tv = NULL;
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+
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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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+ dummy_server_init(&s, NULL, 0);
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+
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+ sealed_fd = memfd_new(NULL);
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+ assert_se(sealed_fd >= 0);
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+ assert_se(write(sealed_fd, data, size) == (ssize_t) size);
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+ assert_se(memfd_set_sealed(sealed_fd) >= 0);
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+ assert_se(lseek(sealed_fd, 0, SEEK_SET) == 0);
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+ ucred = (struct ucred) {
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+ .pid = getpid_cached(),
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+ .uid = geteuid(),
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+ .gid = getegid(),
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+ };
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+ server_process_native_file(&s, sealed_fd, &ucred, tv, label, label_len);
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+
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+ unsealed_fd = mkostemp_safe(name);
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+ assert_se(unsealed_fd >= 0);
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+ assert_se(write(unsealed_fd, data, size) == (ssize_t) size);
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+ assert_se(lseek(unsealed_fd, 0, SEEK_SET) == 0);
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+ server_process_native_file(&s, unsealed_fd, &ucred, tv, label, label_len);
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+
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+ server_done(&s);
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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 eea9117360..5315d2771c 100644
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--- a/src/fuzz/meson.build
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+++ b/src/fuzz/meson.build
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@@ -51,6 +51,12 @@ fuzzers += [
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libshared],
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[libselinux]],
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+ [['src/fuzz/fuzz-journald-native-fd.c',
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+ 'src/fuzz/fuzz-journald.c'],
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+ [libjournal_core,
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+ libshared],
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+ [libselinux]],
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+
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[['src/fuzz/fuzz-journald-stream.c',
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'src/fuzz/fuzz-journald.c'],
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[libjournal_core,
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diff --git a/test/fuzz/fuzz-journald-native-fd/basic b/test/fuzz/fuzz-journald-native-fd/basic
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new file mode 100644
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index 0000000000000000000000000000000000000000..65f89705a655618851c0e446efaa5c633adf425f
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GIT binary patch
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literal 34
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kcmeZu4Gwm6cjaPXfB;7>M@KGyCofm$koW*k7h3}^0B8*cRR910
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literal 0
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HcmV?d00001
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