[Qemu-devel] [PULL 2/2] usb-audio: ignore usb packages with wrong size

[Gerd Hoffmann]

usb packets with no payload (zero length) seem to happen in practice for
whatever reason.  Add a check and skip the packet then, otherwise we'll
trigger an assert.

Reported-by: Leonardo Soares Müller <address@hidden>
Signed-off-by: Gerd Hoffmann <address@hidden>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
Message-id: address@hidden
---
 hw/usb/dev-audio.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/usb/dev-audio.c b/hw/usb/dev-audio.c
index ee43e4914d..28ac7c5165 100644
--- a/hw/usb/dev-audio.c
+++ b/hw/usb/dev-audio.c
@@ -321,6 +321,9 @@ static int streambuf_put(struct streambuf *buf, USBPacket 
*p)
     if (!free) {
         return 0;
     }
+    if (p->iov.size != USBAUDIO_PACKET_SIZE) {
+        return 0;
+    }
     assert(free >= USBAUDIO_PACKET_SIZE);
     usb_packet_copy(p, buf->data + (buf->prod % buf->size),
                     USBAUDIO_PACKET_SIZE);
-- 
2.9.3