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From aec984020cd22ac8a199bcd067047fba50850889 Mon Sep 17 00:00:00 2001
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From: Evgeny Vereshchagin <evvers@ya.ru>
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Date: Wed, 26 Sep 2018 15:04:26 +0000
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Subject: [PATCH] tests: add a fuzzer for sd-ndisc
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(cherry picked from commit 0f0a1dad7d69802a7e6c7fc9aba350f0e87c1952)
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Resolves: #1696224
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---
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src/fuzz/fuzz-ndisc-rs.c | 57 ++++++++++++++++++++++++++++++++++++++++
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src/fuzz/meson.build | 10 +++++++
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2 files changed, 67 insertions(+)
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create mode 100644 src/fuzz/fuzz-ndisc-rs.c
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diff --git a/src/fuzz/fuzz-ndisc-rs.c b/src/fuzz/fuzz-ndisc-rs.c
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new file mode 100644
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index 0000000000..7f2d8f8649
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--- /dev/null
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+++ b/src/fuzz/fuzz-ndisc-rs.c
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@@ -0,0 +1,57 @@
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+/* SPDX-License-Identifier: LGPL-2.1+ */
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+
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+#include <netinet/icmp6.h>
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+#include <arpa/inet.h>
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+
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+#include "alloc-util.h"
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+#include "icmp6-util.h"
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+#include "fuzz.h"
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+#include "sd-ndisc.h"
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+#include "socket-util.h"
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+#include "ndisc-internal.h"
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+
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+static int test_fd[2];
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+
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+int icmp6_bind_router_solicitation(int index) {
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+ assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, test_fd) >= 0);
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+ return test_fd[0];
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+}
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+
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+int icmp6_bind_router_advertisement(int index) {
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+ return -ENOSYS;
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+}
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+
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+int icmp6_receive(int fd, void *iov_base, size_t iov_len,
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+ struct in6_addr *dst, triple_timestamp *timestamp) {
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+ assert_se(read(fd, iov_base, iov_len) == (ssize_t) iov_len);
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+
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+ if (timestamp)
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+ triple_timestamp_get(timestamp);
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+
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+ return 0;
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+}
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+
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+int icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr) {
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+ return 0;
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+}
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+
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+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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+ struct ether_addr mac_addr = {
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+ .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
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+ };
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+ _cleanup_(sd_event_unrefp) sd_event *e = NULL;
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+ _cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL;
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+
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+ assert_se(sd_event_new(&e) >= 0);
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+ assert_se(sd_ndisc_new(&nd) >= 0);
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+ assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0);
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+ assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0);
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+ assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0);
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+ assert_se(sd_ndisc_start(nd) >= 0);
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+ assert_se(write(test_fd[1], data, size) == (ssize_t) size);
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+ (void) sd_event_run(e, (uint64_t) -1);
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+ assert_se(sd_ndisc_stop(nd) >= 0);
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+ close(test_fd[1]);
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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 5a97ef5091..5c81ac0c5b 100644
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--- a/src/fuzz/meson.build
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+++ b/src/fuzz/meson.build
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@@ -14,6 +14,16 @@ fuzzers += [
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libshared],
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[]],
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+ [['src/fuzz/fuzz-ndisc-rs.c',
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+ 'src/libsystemd-network/dhcp-identifier.h',
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+ 'src/libsystemd-network/dhcp-identifier.c',
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+ 'src/libsystemd-network/icmp6-util.h',
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+ 'src/systemd/sd-dhcp6-client.h',
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+ 'src/systemd/sd-ndisc.h'],
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+ [libshared,
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+ libsystemd_network],
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+ []],
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+
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[['src/fuzz/fuzz-unit-file.c'],
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[libcore,
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libshared],
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