As stated in AVRCP 1.6.2 chapter 6.10.2.3 Media element item, for the
Displayable Name Length property, the target device may truncate the
item name:
Length of Displayable Name in octets. The name shall be limited such
that a response to a GetFolderItems containing one media player item
fits within the maximum size of PDU which can be received by the CT.
This truncatation may occur in the middle of a multi-byte character,
at least with Samsung Music app, which triggers a DBus assertion and
crashes bluetoothd:
profiles/audio/player.c:media_folder_create_item() Din Dhal Jaye
Haye with lyrics | "दिन ढल जाए
हाय" गाने के बो� type audio uid 1
profiles/audio/player.c:media_folder_create_item()
/org/bluez/hci0/dev_24_24_B7_11_82_6C/player0/NowPlaying/item1
profiles/audio/player.c:media_player_set_metadata() Title: Din Dhal
Jaye Haye with lyrics | "दिन ढल जाए हाय"
गाने के बोल | Guide | Dev Anand, Waheeda Rehman
…
arguments to dbus_message_iter_append_basic() were incorrect,
assertion "_dbus_check_is_valid_utf8 (*string_p)" failed in
file dbus-message.c line 2775.
This is normally a bug in some application using the D-Bus library.
---
profiles/audio/avrcp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/profiles/audio/avrcp.c b/profiles/audio/avrcp.c
index 831f1dc8b..30997335a 100644
--- a/profiles/audio/avrcp.c
+++ b/profiles/audio/avrcp.c
@@ -2595,8 +2595,10 @@ static struct media_item *parse_media_element(struct avrcp *session,
memset(name, 0, sizeof(name));
namesize = get_be16(&operands[11]);
namelen = MIN(namesize, sizeof(name) - 1);
- if (namelen > 0)
+ if (namelen > 0) {
memcpy(name, &operands[13], namelen);
+ strtoutf8(name, namelen);
+ }
count = operands[13 + namesize];
--
2.43.0
