shared/gatt-server: Fix crash on read multiple
When read multiple includes external characteristic, call to
gatt_db_attribute_read's complete callback is asynchronous.
Fix following crash:
Use of uninitialised value of size 8
at 0x49718A: read_multiple_complete_cb (gatt-server.c:994)
by 0x498999: pending_read_result (gatt-db.c:136)
by 0x49A84B: gatt_db_attribute_read_result (gatt-db.c:1787)
by 0x451F4C: read_reply_cb (gatt-database.c:1712)
by 0x48B221: method_call_reply (client.c:972)
by 0x53AB601: ??? (in /usr/lib64/libdbus-1.so.3.19.3)
by 0x53AEF7E: dbus_connection_dispatch (in /usr/lib64/libdbus-1.so.3.19.3)
by 0x486FEF: message_dispatch (mainloop.c:72)
by 0x50CB576: ??? (in /usr/lib64/libglib-2.0.so.0.5400.3)
by 0x50CEB76: g_main_context_dispatch (in /usr/lib64/libglib-2.0.so.0.5400.3)
by 0x50CEF1F: ??? (in /usr/lib64/libglib-2.0.so.0.5400.3)
by 0x50CF231: g_main_loop_run (in /usr/lib64/libglib-2.0.so.0.5400.3)
Invalid read of size 8
at 0x49718A: read_multiple_complete_cb (gatt-server.c:994)
by 0x498999: pending_read_result (gatt-db.c:136)
by 0x49A84B: gatt_db_attribute_read_result (gatt-db.c:1787)
by 0x451F4C: read_reply_cb (gatt-database.c:1712)
by 0x48B221: method_call_reply (client.c:972)
by 0x53AB601: ??? (in /usr/lib64/libdbus-1.so.3.19.3)
by 0x53AEF7E: dbus_connection_dispatch (in /usr/lib64/libdbus-1.so.3.19.3)
by 0x486FEF: message_dispatch (mainloop.c:72)
by 0x50CB576: ??? (in /usr/lib64/libglib-2.0.so.0.5400.3)
by 0x50CEB76: g_main_context_dispatch (in /usr/lib64/libglib-2.0.so.0.5400.3)
by 0x50CEF1F: ??? (in /usr/lib64/libglib-2.0.so.0.5400.3)
by 0x50CF231: g_main_loop_run (in /usr/lib64/libglib-2.0.so.0.5400.3)
Address 0x8 is not stack'd, malloc'd or (recently) free'd
1 file changed
