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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "alloc-util.h"
#include "bus-internal.h"
#include "bus-match.h"
#include "env-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "fuzz.h"
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
_cleanup_free_ char *out = NULL; /* out should be freed after g */
size_t out_size;
_cleanup_fclose_ FILE *g = NULL;
_cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
int r;
if (outside_size_range(size, 0, 65536))
return 0;
/* We don't want to fill the logs with messages about parse errors.
* Disable most logging if not running standalone */
if (!getenv("SYSTEMD_LOG_LEVEL"))
log_set_max_level(LOG_CRIT);
r = sd_bus_new(&bus);
assert_se(r >= 0);
struct bus_match_node root = {
.type = BUS_MATCH_ROOT,
};
/* Note that we use the pointer to match_callback substructure, but the code
* uses container_of() to access outside of the passed-in type. */
sd_bus_slot slot = {
.type = BUS_MATCH_CALLBACK,
.match_callback = {},
};
if (getenv_bool("SYSTEMD_FUZZ_OUTPUT") <= 0)
assert_se(g = open_memstream_unlocked(&out, &out_size));
for (size_t offset = 0; offset < size; ) {
_cleanup_free_ char *line = NULL;
char *end;
end = memchr((char*) data + offset, '\n', size - offset);
line = memdup_suffix0((char*) data + offset,
end ? end - (char*) data - offset : size - offset);
if (!line)
return log_oom_debug();
offset = end ? (size_t) (end - (char*) data + 1) : size;
struct bus_match_component *components;
unsigned n_components;
r = bus_match_parse(line, &components, &n_components);
if (IN_SET(r, -EINVAL, -ENOMEM)) {
log_debug_errno(r, "Failed to parse line: %m");
continue;
}
assert_se(r >= 0); /* We only expect EINVAL and ENOMEM errors, or success. */
log_debug("Parsed %u components.", n_components);
_cleanup_free_ char *again = bus_match_to_string(components, n_components);
if (!again) {
bus_match_parse_free(components, n_components);
log_oom();
break;
}
if (g)
fprintf(g, "%s\n", again);
r = bus_match_add(&root, components, n_components, &slot.match_callback);
bus_match_parse_free(components, n_components);
if (r < 0) {
log_error_errno(r, "Failed to add match: %m");
break;
}
}
bus_match_dump(g ?: stdout, &root, 0); /* We do this even on failure, to check consistency after error. */
bus_match_free(&root);
return 0;
}
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