]>
git.ipfire.org Git - thirdparty/systemd.git/blob - src/fuzz/fuzz-udev-rules.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
15 #include "string-util.h"
19 static const struct fakefs
{
21 bool ignore_mount_error
;
27 { UDEVLIBEXECDIR
"/rules.d", true },
30 static int setup_mount_namespace(void) {
31 static thread_local
bool is_namespaced
= false;
36 if (unshare(CLONE_NEWNS
) < 0)
37 return log_error_errno(errno
, "Failed to call unshare(): %m");
39 if (mount(NULL
, "/", NULL
, MS_SLAVE
|MS_REC
, NULL
) < 0)
40 return log_error_errno(errno
, "Failed to mount / as private: %m");
47 static int setup_fake_filesystems(const char *runtime_dir
) {
48 for (unsigned i
= 0; i
< ELEMENTSOF(fakefss
); i
++)
49 if (mount(runtime_dir
, fakefss
[i
].target
, NULL
, MS_BIND
, NULL
) < 0) {
50 log_full_errno(fakefss
[i
].ignore_mount_error
? LOG_DEBUG
: LOG_ERR
, errno
, "Failed to mount %s: %m", fakefss
[i
].target
);
51 if (!fakefss
[i
].ignore_mount_error
)
58 static int cleanup_fake_filesystems(const char *runtime_dir
) {
59 for (unsigned i
= 0; i
< ELEMENTSOF(fakefss
); i
++)
60 if (umount(fakefss
[i
].target
) < 0) {
61 log_full_errno(fakefss
[i
].ignore_mount_error
? LOG_DEBUG
: LOG_ERR
, errno
, "Failed to umount %s: %m", fakefss
[i
].target
);
62 if (!fakefss
[i
].ignore_mount_error
)
68 int LLVMFuzzerTestOneInput(const uint8_t *data
, size_t size
) {
69 _cleanup_(udev_rules_freep
) struct udev_rules
*rules
= NULL
;
70 _cleanup_(rm_rf_physical_and_freep
) char *runtime_dir
= NULL
;
73 if (!getenv("SYSTEMD_LOG_LEVEL")) {
74 log_set_max_level_realm(LOG_REALM_UDEV
, LOG_CRIT
);
75 log_set_max_level_realm(LOG_REALM_SYSTEMD
, LOG_CRIT
);
78 if (setup_mount_namespace() < 0)
79 return EXIT_TEST_SKIP
;
81 assert_se(runtime_dir
= setup_fake_runtime_dir());
83 assert_se(setup_fake_filesystems(runtime_dir
) >= 0);
84 assert_se(mkdir_p("/etc/udev/rules.d", 0755) >= 0);
85 f
= fopen("/etc/udev/rules.d/fuzz.rules", "we");
88 assert_se(fwrite(data
, size
, 1, f
) == 1);
89 assert_se(fclose(f
) == 0);
90 rules
= udev_rules_new(RESOLVE_NAME_EARLY
);
92 assert_se(cleanup_fake_filesystems(runtime_dir
) >= 0);