[PATCH BlueZ 08/11] src/shared: move null checks before dereferencing

[Ismagil Iskakov <i.iskakov@omp.ru>]

---
 src/shared/bap.c     | 14 ++++++++------
 src/shared/gatt-db.c |  5 ++++-
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/src/shared/bap.c b/src/shared/bap.c
index 96fca595b..5b904af9b 100644
--- a/src/shared/bap.c
+++ b/src/shared/bap.c
@@ -2570,12 +2570,12 @@ static uint8_t bap_ucast_io_dir(struct bt_bap_stream *stream)
 
 static uint8_t bap_bcast_io_dir(struct bt_bap_stream *stream)
 {
-	uint8_t dir;
-	uint8_t pac_type = bt_bap_pac_get_type(stream->lpac);
-
 	if (!stream)
 		return 0x00;
 
+	uint8_t dir;
+	uint8_t pac_type = bt_bap_pac_get_type(stream->lpac);
+
 	if (pac_type == BT_BAP_BCAST_SINK)
 		dir = BT_BAP_BCAST_SOURCE;
 	else
@@ -6144,7 +6144,7 @@ static struct bt_bap_stream *bap_bcast_stream_new(struct bt_bap *bap,
 	struct bt_bap_endpoint *ep = NULL;
 	struct match_pac match;
 
-	if (!bap)
+	if (!bap || !lpac)
 		return NULL;
 
 	if (lpac->type == BT_BAP_BCAST_SOURCE) {
@@ -6153,7 +6153,7 @@ static struct bt_bap_stream *bap_bcast_stream_new(struct bt_bap *bap,
 		memset(&match.codec, 0, sizeof(match.codec));
 
 		bt_bap_foreach_pac(bap, BT_BAP_BCAST_SINK, match_pac, &match);
-		if ((!match.lpac) || (!lpac))
+		if (!match.lpac)
 			return NULL;
 
 		lpac = match.lpac;
@@ -6406,11 +6406,13 @@ unsigned int bt_bap_stream_release(struct bt_bap_stream *stream,
 					void *user_data)
 {
 	unsigned int id;
-	struct bt_bap *bap = stream->bap;
+	struct bt_bap *bap;
 
 	if (!stream || !stream->ops || !stream->ops->release)
 		return 0;
 
+	bap = stream->bap;
+
 	if (!bt_bap_ref_safe(bap))
 		return 0;
 
diff --git a/src/shared/gatt-db.c b/src/shared/gatt-db.c
index 8951079be..a4fa8aed9 100644
--- a/src/shared/gatt-db.c
+++ b/src/shared/gatt-db.c
@@ -1391,12 +1391,15 @@ static void find_by_type(struct gatt_db_attribute *attribute, void *user_data)
 {
 	struct find_by_type_value_data *search_data = user_data;
 
+	if (!attribute)
+		return;
+
 	/* TODO: fix for read-callback based attributes */
 	if (search_data->value) {
 		if (search_data->value_len != attribute->value_len)
 			return;
 
-		if (!attribute || !attribute->value)
+		if (!attribute->value)
 			return;
 
 		if (memcmp(attribute->value, search_data->value,
-- 
2.34.1