[PATCH BlueZ v1] shared/csip: add NULL check to foreach_csis_service()

[Roman Smirnov <r.smirnov@xxxxxx>]

It is necessary to prevent dereferencing of a NULL pointer.

Found with the SVACE static analysis tool.
---
 src/shared/csip.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/shared/csip.c b/src/shared/csip.c
index 87b4590d9..a9c57c9bd 100644
--- a/src/shared/csip.c
+++ b/src/shared/csip.c
@@ -611,6 +611,9 @@ static void foreach_csis_service(struct gatt_db_attribute *attr,
 	struct bt_csip *csip = user_data;
 	struct bt_csis *csis = csip_get_csis(csip);
 
+	if (!csis)
+		return;
+
 	csis->service = attr;
 
 	gatt_db_service_set_claimed(attr, true);
-- 
2.34.1