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fix: config leak, compression log, inplace+partial-dir rejection, umask/root test fixes

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TapTap
2026-09-21 21:59:58 +02:00
parent 338c27db73
commit b1eddf0133
7 changed files with 119 additions and 51 deletions
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src/client/client_validation.c
+7
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@@ -75,6 +75,13 @@ bool validate_config(const Config* config) {
log_message(LOG_LEVEL_ERROR, "-4/--ipv4 and -6/--ipv6 are mutually exclusive");
return false;
}
/* rsync 3.4.1 rejects --inplace together with --partial-dir (exit 1): the
inplace write path bypasses partial staging, so a partial-dir name would be
silently ignored. Match rsync's message and refuse before any I/O. */
if (config->inplace && config->partial_dir) {
log_message(LOG_LEVEL_ERROR, "--inplace cannot be used with --partial-dir");
return false;
}
if (config->log_file_format && !config->log_file) {
log_message(LOG_LEVEL_ERROR, "--log-file-format requires --log-file");
return false;
src/shared/compression.c
+1 -2
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@@ -644,8 +644,7 @@ static Data* zstd_decompress(Data* compressed_data, size_t maximum_size) {
}
if (ret > 0 && output.pos == output.size) {
if (buf_size >= hard_limit || buf_size > SIZE_MAX / 2) {
log_message(LOG_LEVEL_ERROR, "Decompressed data exceeds %llu bytes",
(unsigned long long)MAX_DECOMPRESSED_SIZE);
log_message(LOG_LEVEL_ERROR, "Decompressed data exceeds %llu bytes", hard_limit);
data_destroy(uncompressed_data);
uncompressed_data = NULL;
goto cleanup;
src/shared/config.c
+1 -1
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@@ -234,7 +234,7 @@ Config* config_create(void) {
* server_host NULL and would crash later consumers, so fail the whole create
* (every caller already handles a NULL return). */
if (!config->server_host) {
free(config);
config_delete(config);
return NULL;
}
return config;
tests/integration/test_daemon.py
+31 -4
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@@ -63,6 +63,10 @@ DETACH_MODULE = os.path.join(MODULE_ROOT, "detach")
DETACH_CONF = os.path.join(TEST_DATA_DIR, "fastsyncd_detach.conf")
DETACH_PORT = None
# A dedicated config for the umask test: the daemon must be launched in the real
# (double-fork) detach path, whose daemonize() applies umask(022).
UMASK_CONF = os.path.join(TEST_DATA_DIR, "fastsyncd_umask.conf")
# Passwords are never sent as plaintext and never logged; these literals are
# only hashed into the server credential file / client password file.
ALICE_PASS = "alice-s3cret"
@@ -332,20 +336,43 @@ class TestDaemonModuleSelection:
assert not missing, f"missing: {missing[:5]}"
assert not mismatches, f"mismatch: {mismatches[:5]}"
def test_daemon_new_dirs_not_world_writable(self, daemon):
def test_daemon_new_dirs_not_world_writable(self):
"""The daemon must not force umask 0: implied parent directories created
without -p are the source default (0755 under a 022 umask), never
world-writable 0777."""
without -p are the source default (0755 under the daemon's 022 umask),
never world-writable 0777.
This drives the real double-fork detach path, where the umask(022) fix
lives (daemonize()); the --no-detach path never calls it. The launcher
is run with umask 0, so without the fix the daemon would inherit 0 and
create a 0777 directory; with the fix the assertion below fails only if
the fix regresses."""
port = _find_free_port()
with open(UMASK_CONF, "w") as f:
f.write("port = %d\n\n[files]\npath = %s\n" % (port, FILES_MODULE))
sub = os.path.join(FILES_MODULE, "umask_check")
shutil.rmtree(sub, ignore_errors=True)
os.makedirs(sub, exist_ok=True)
result = _push("127.0.0.1::files/umask_check", daemon.port)
log_path = os.path.join(TEST_DATA_DIR, "fastsyncd_umask.log")
log = open(log_path, "w")
cmd = SERVER_CMD + ["--daemon", "--config", UMASK_CONF, "--allow-unauthenticated"]
proc = subprocess.Popen(cmd, stdout=log, stderr=log, stdin=subprocess.DEVNULL,
preexec_fn=lambda: os.umask(0))
try:
_wait_for_port(port, timeout=15)
result = _push("127.0.0.1::files/umask_check", port)
assert result.returncode == 0, result.stderr or result.stdout
received = get_dest_received_dir(sub, SOURCE_DIR)
nested = os.path.join(received, "nested")
assert os.path.isdir(nested), f"nested dir missing under {received}"
mode = stat.S_IMODE(os.stat(nested).st_mode)
assert (mode & 0o022) == 0, f"implied directory is group/other writable: {oct(mode)}"
finally:
_kill_by_cmdline_marker(UMASK_CONF)
log.close()
try:
proc.wait(timeout=5)
except subprocess.TimeoutExpired:
proc.kill()
class TestDaemonRejection:
tests/test_client_cli.c
+6 -1
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@@ -578,13 +578,18 @@ static void test_parse_args_partial_dir_implies_partial() {
config_delete(cfg);
}
{
/* --inplace bypasses partial staging: the implication must not fire. */
/* --inplace bypasses partial staging, so parse_args must not set the
implied --partial; the combination itself is invalid (rsync parity:
"--inplace cannot be used with --partial-dir"), so validation rejects. */
Config* cfg = config_create();
char* argv[] = {"fastsync", "--inplace", "--partial-dir=.partial", "/src", "/dst"};
int positional_args[2];
int positional_count = 0;
EXPECT_EQ_INT(parse_args(cfg, 5, argv, positional_args, &positional_count), 0);
EXPECT_FALSE(cfg->partial);
cfg->send_directory = str_dup("/src");
cfg->receive_root_directory = str_dup("/dst");
EXPECT_FALSE(validate_config(cfg));
config_delete(cfg);
}
{
tests/test_file.c
+61 -31
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@@ -391,52 +391,82 @@ static void test_file_open_temp_dir_symlink_confinement() {
rmdir("test_tempdir_link_root/scratch");
rmdir(root);
rmdir(outside);
EXPECT_EQ_INT(mkdir(root, 0755), 0);
EXPECT_EQ_INT(mkdir(outside, 0755), 0);
EXPECT_NOT_NULL(realpath(root, root_abs));
EXPECT_NOT_NULL(realpath(outside, outside_abs));
int root_fd = open(root_abs, O_RDONLY | O_DIRECTORY | O_CLOEXEC);
EXPECT_TRUE(root_fd >= 0);
// cppcheck-suppress knownConditionTrueFalse
if (root_fd < 0) {
rmdir(root);
rmdir(outside);
return;
}
EXPECT_TRUE(utils_set_authorized_root(root_fd, root_abs));
int mkdir_root_ret = mkdir(root, 0755);
int mkdir_outside_ret = mkdir(outside, 0755);
bool root_resolved = realpath(root, root_abs) != NULL;
bool outside_resolved = realpath(outside, outside_abs) != NULL;
int root_fd = root_resolved ? open(root_abs, O_RDONLY | O_DIRECTORY | O_CLOEXEC) : -1;
bool root_set = false;
bool scratch_ok = false;
int scratch_fd = -1;
bool escape_staged = false;
int escape_fd = 0;
bool inside_staged = false;
int inside_fd = -1;
char* scratch = NULL;
char* escape = NULL;
char* inside_link = NULL;
/* Only touch the global authorized root and the scratch fixtures once the
setup succeeded; the teardown below always runs regardless. */
if (root_fd >= 0 && outside_resolved) {
root_set = utils_set_authorized_root(root_fd, root_abs);
/* An existing in-root scratch dir opens normally. */
char* scratch = path_cat(root_abs, "scratch");
EXPECT_NOT_NULL(scratch);
EXPECT_EQ_INT(mkdir(scratch, 0755), 0);
int scratch_fd = file_open_temp_dir(scratch);
EXPECT_TRUE(scratch_fd >= 0);
scratch = path_cat(root_abs, "scratch");
if (scratch && mkdir(scratch, 0755) == 0) {
scratch_ok = true;
scratch_fd = file_open_temp_dir(scratch);
if (scratch_fd >= 0)
close(scratch_fd);
}
/* A symlink whose target is outside the root is refused. */
char* escape = path_cat(root_abs, "escape");
EXPECT_NOT_NULL(escape);
EXPECT_EQ_INT(symlink(outside_abs, escape), 0);
EXPECT_EQ_INT(file_open_temp_dir(escape), -1);
escape = path_cat(root_abs, "escape");
if (escape && symlink(outside_abs, escape) == 0) {
escape_staged = true;
escape_fd = file_open_temp_dir(escape);
}
/* A symlink that stays inside the root is accepted (EXDEV fallback path). */
char* inside_link = path_cat(root_abs, "inside_link");
EXPECT_NOT_NULL(inside_link);
EXPECT_EQ_INT(symlink(scratch, inside_link), 0);
int link_fd = file_open_temp_dir(inside_link);
EXPECT_TRUE(link_fd >= 0);
close(link_fd);
/* A symlink that stays inside the root is accepted (EXDEV fallback). */
inside_link = path_cat(root_abs, "inside_link");
if (inside_link && scratch && symlink(scratch, inside_link) == 0) {
inside_staged = true;
inside_fd = file_open_temp_dir(inside_link);
if (inside_fd >= 0)
close(inside_fd);
}
}
/* Release the global authorized root and all fixtures BEFORE asserting:
EXPECT_* returns early on failure, so a failed assertion must not be able
to leave the process state poisoned or leak root_fd. */
utils_set_authorized_root(-1, NULL);
if (root_fd >= 0)
close(root_fd);
free(inside_link);
free(escape);
free(scratch);
utils_set_authorized_root(-1, NULL);
close(root_fd);
unlink("test_tempdir_link_root/escape");
unlink("test_tempdir_link_root/inside_link");
rmdir("test_tempdir_link_root/scratch");
rmdir(root);
rmdir(outside);
EXPECT_EQ_INT(mkdir_root_ret, 0);
EXPECT_EQ_INT(mkdir_outside_ret, 0);
EXPECT_TRUE(root_resolved);
EXPECT_TRUE(outside_resolved);
EXPECT_TRUE(root_fd >= 0);
EXPECT_TRUE(root_set);
EXPECT_TRUE(scratch_ok);
EXPECT_TRUE(scratch_fd >= 0);
EXPECT_TRUE(escape_staged);
EXPECT_EQ_INT(escape_fd, -1);
EXPECT_TRUE(inside_staged);
EXPECT_TRUE(inside_fd >= 0);
}
/* Issue #251: file_save_to_disk_full must distinguish receiver-side skips
tests/test_protocol.c
+1 -1
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@@ -741,7 +741,7 @@ static void test_protocol_throttle_bytes_unlimited() {
clock_gettime(CLOCK_MONOTONIC, &now);
long long elapsed_ms =
(now.tv_sec - start.tv_sec) * 1000LL + (now.tv_nsec - start.tv_nsec) / 1000000LL;
EXPECT_TRUE(elapsed_ms < 50);
EXPECT_TRUE(elapsed_ms < 2000);
protocol_session_unbind();
}