2022-02-11 09:20:54

by Tedd Ho-Jeong An

Subject: [BlueZ PATCH 1/3] adapter: Fix the reusing gerror without re-initialization

From: Tedd Ho-Jeong An <[email protected]>

When the GError variable is freeed with g_error_free(), it is not set to
NULL and reusing the same variable again can cause the seg_fault because
it is still pointing the old memory address which is freed.

This patch relaces the g_error_free() to g_clear_error() which frees the
variable and set it to NULL if the variable is used in the function
again.

Fixes: 2287c517ca1bd ("adapter: Fix unchecked return value")
Fixes: https://github.com/bluez/bluez/issues/276
---
src/adapter.c | 34 +++++++++++++++++-----------------
1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/src/adapter.c b/src/adapter.c
index 3ee98431d..eef50f67a 100644
--- a/src/adapter.c
+++ b/src/adapter.c
@@ -4676,7 +4676,7 @@ static void load_devices(struct btd_adapter *adapter)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

key_info = get_key_info(key_file, entry->d_name);
@@ -5662,7 +5662,7 @@ static void convert_names_entry(char *key, char *value, void *user_data)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}
g_key_file_set_string(key_file, "General", "Name", value);

@@ -5895,7 +5895,7 @@ static void convert_entry(char *key, char *value, void *user_data)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

set_device_type(key_file, type);
@@ -6001,7 +6001,7 @@ static void store_sdp_record(char *local, char *peer, int handle, char *value)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

sprintf(handle_str, "0x%8.8X", handle);
@@ -6085,7 +6085,7 @@ static void convert_sdp_entry(char *key, char *value, void *user_data)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

store_attribute_uuid(key_file, start, end, prim_uuid, uuid);
@@ -6145,7 +6145,7 @@ static void convert_primaries_entry(char *key, char *value, void *user_data)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

for (service = services; *service; service++) {
@@ -6170,7 +6170,7 @@ static void convert_primaries_entry(char *key, char *value, void *user_data)
if (!g_file_set_contents(filename, data, length, &gerr)) {
error("Unable set contents for %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

if (device_type < 0)
@@ -6185,7 +6185,7 @@ static void convert_primaries_entry(char *key, char *value, void *user_data)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}
set_device_type(key_file, device_type);

@@ -6241,7 +6241,7 @@ static void convert_ccc_entry(char *key, char *value, void *user_data)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

sprintf(group, "%hu", handle);
@@ -6297,7 +6297,7 @@ static void convert_gatt_entry(char *key, char *value, void *user_data)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

sprintf(group, "%hu", handle);
@@ -6352,7 +6352,7 @@ static void convert_proximity_entry(char *key, char *value, void *user_data)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

g_key_file_set_string(key_file, alert, "Level", value);
@@ -6556,7 +6556,7 @@ static void load_config(struct btd_adapter *adapter)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

/* Get alias */
@@ -8313,7 +8313,7 @@ static void store_ltk_group(struct btd_adapter *adapter, const bdaddr_t *peer,
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

for (i = 0; i < 16; i++)
@@ -8479,7 +8479,7 @@ static void store_csrk(struct btd_adapter *adapter, const bdaddr_t *peer,
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

for (i = 0; i < 16; i++)
@@ -8657,7 +8657,7 @@ static void store_conn_param(struct btd_adapter *adapter, const bdaddr_t *peer,
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

g_key_file_set_integer(key_file, "ConnectionParameters",
@@ -9316,7 +9316,7 @@ static void remove_keys(struct btd_adapter *adapter,
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

if (type == BDADDR_BREDR) {
@@ -9418,7 +9418,7 @@ static bool get_static_addr(struct btd_adapter *adapter)
&gerr)) {
error("Unable to load key file from %s: (%s)",
STORAGEDIR "/addresses", gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}
addrs = g_key_file_get_string_list(file, "Static", mfg, &len, NULL);
if (addrs) {
--
2.25.1

2022-02-12 18:30:06

by Tedd Ho-Jeong An

Subject: [BlueZ PATCH 3/3] profiles: Fix the reusing gerror without re-initialization

From: Tedd Ho-Jeong An <[email protected]>

When the GError variable is freeed with g_error_free(), it is not set to
NULL and reusing the same variable again can cause the seg_fault because
it is still pointing the old memory address which is freed.

This patch relaces the g_error_free() to g_clear_error() which frees the
variable and set it to NULL if the variable is used in the function
again.

Fixes: 4ad622d592ba5 ("profiles/a2dp: Fix unchecked return value")
---
profiles/audio/a2dp.c | 4 ++--
profiles/health/hdp.c | 6 +++---
profiles/input/device.c | 2 +-
3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/profiles/audio/a2dp.c b/profiles/audio/a2dp.c
index d0808c77a..9fbcd35f7 100644
--- a/profiles/audio/a2dp.c
+++ b/profiles/audio/a2dp.c
@@ -832,7 +832,7 @@ static void store_remote_seps(struct a2dp_channel *chan)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

data = g_key_file_get_string(key_file, "Endpoints", "LastUsed",
@@ -1006,7 +1006,7 @@ static void store_last_used(struct a2dp_channel *chan, uint8_t lseid,
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}

sprintf(value, "%02hhx:%02hhx", lseid, rseid);
diff --git a/profiles/health/hdp.c b/profiles/health/hdp.c
index 40b6cc18a..9d9d1e824 100644
--- a/profiles/health/hdp.c
+++ b/profiles/health/hdp.c
@@ -576,7 +576,7 @@ static void device_reconnect_mdl_cb(struct mcap_mdl *mdl, GError *err,
"Cannot reconnect: %s", gerr->message);
g_dbus_send_message(conn, reply);
hdp_tmp_dc_data_unref(dc_data);
- g_error_free(gerr);
+ g_clear_error(&gerr);

/* Send abort request because remote side is now in PENDING state */
if (!mcap_mdl_abort(mdl, abort_mdl_cb, NULL, NULL, &gerr)) {
@@ -1766,7 +1766,7 @@ static void device_create_mdl_cb(struct mcap_mdl *mdl, uint8_t conf,
return;

error("%s", gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);

reply = g_dbus_create_reply(hdp_conn->msg,
DBUS_TYPE_OBJECT_PATH, &hdp_chan->path,
@@ -1790,7 +1790,7 @@ fail:
ERROR_INTERFACE ".HealthError",
"%s", gerr->message);
g_dbus_send_message(conn, reply);
- g_error_free(gerr);
+ g_clear_error(&gerr);

/* Send abort request because remote side is now in PENDING */
/* state. Then we have to delete it because we couldn't */
diff --git a/profiles/input/device.c b/profiles/input/device.c
index 013899211..ff4aa771a 100644
--- a/profiles/input/device.c
+++ b/profiles/input/device.c
@@ -1053,7 +1053,7 @@ static int hidp_add_connection(struct input_device *idev)
if (!g_key_file_load_from_file(key_file, filename, 0, &gerr)) {
error("Unable to load key file from %s: (%s)", filename,
gerr->message);
- g_error_free(gerr);
+ g_clear_error(&gerr);
}
str = g_key_file_get_string(key_file, "ServiceRecords", handle, NULL);
g_key_file_free(key_file);
--
2.25.1