1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3 #include "fd-util.h"
4 #include "fs-util.h"
5 #include "fuzz-journald.h"
6 #include "fuzz.h"
7 #include "journald-native.h"
8 #include "memfd-util.h"
9 #include "process-util.h"
10 #include "tmpfile-util.h"
11
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)12 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
13 Server s;
14 _cleanup_close_ int sealed_fd = -1, unsealed_fd = -1;
15 _cleanup_(unlink_tempfilep) char name[] = "/tmp/fuzz-journald-native-fd.XXXXXX";
16 char *label = NULL;
17 size_t label_len = 0;
18 struct ucred ucred;
19 struct timeval *tv = NULL;
20
21 if (!getenv("SYSTEMD_LOG_LEVEL"))
22 log_set_max_level(LOG_CRIT);
23
24 dummy_server_init(&s, NULL, 0);
25
26 sealed_fd = memfd_new(NULL);
27 assert_se(sealed_fd >= 0);
28 assert_se(write(sealed_fd, data, size) == (ssize_t) size);
29 assert_se(memfd_set_sealed(sealed_fd) >= 0);
30 assert_se(lseek(sealed_fd, 0, SEEK_SET) == 0);
31 ucred = (struct ucred) {
32 .pid = getpid_cached(),
33 .uid = geteuid(),
34 .gid = getegid(),
35 };
36 server_process_native_file(&s, sealed_fd, &ucred, tv, label, label_len);
37
38 unsealed_fd = mkostemp_safe(name);
39 assert_se(unsealed_fd >= 0);
40 assert_se(write(unsealed_fd, data, size) == (ssize_t) size);
41 assert_se(lseek(unsealed_fd, 0, SEEK_SET) == 0);
42 server_process_native_file(&s, unsealed_fd, &ucred, tv, label, label_len);
43
44 server_done(&s);
45
46 return 0;
47 }
48