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usb-linux: Refuse iso packets when max packet size is 0 (alt setting 0) 

Refuse iso usb packets when then max packet size for the endpoint is 0,
this avoids an abort in usb_host_alloc_iso() caused by trying to qemu_malloc
a 0 bytes large buffer.
This commit is contained in:
Hans de Goede 2010-11-26 14:59:35 +01:00 committed by Gerd Hoffmann
parent a0b5fece8a
commit 975f29984d
1 changed files with 5 additions and 1 deletions
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6
usb-linux.c
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@ -549,7 +549,11 @@ static int urb_status_to_usb_ret(int status)
static int usb_host_handle_iso_data(USBHostDevice *s, USBPacket *p)
{
AsyncURB *aurb;
int i, j, ret, len = 0;
int i, j, ret, max_packet_size, len = 0;
max_packet_size = get_max_packet_size(s, p->devep);
if (max_packet_size == 0)
return USB_RET_NAK;
aurb = get_iso_urb(s, p->devep);
if (!aurb) {