In ehci_process_itd(), the call to ehci_find_device() can return NULL
if it doesn't find a device matching 'devaddr' so explicitly check
the return value before passing it to usb_ep_get().
Signed-off-by: Liam Merwick <liam.merwick@oracle.com>
Message-id:
1549460216-25808-5-git-send-email-liam.merwick@oracle.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
qemu_sglist_add(&ehci->isgl, ptr1 + off, len);
}
qemu_sglist_add(&ehci->isgl, ptr1 + off, len);
}
- pid = dir ? USB_TOKEN_IN : USB_TOKEN_OUT;
-
dev = ehci_find_device(ehci, devaddr);
dev = ehci_find_device(ehci, devaddr);
+ if (dev == NULL) {
+ ehci_trace_guest_bug(ehci, "no device found");
+ return -1;
+ }
+ pid = dir ? USB_TOKEN_IN : USB_TOKEN_OUT;
ep = usb_ep_get(dev, pid, endp);
if (ep && ep->type == USB_ENDPOINT_XFER_ISOC) {
usb_packet_setup(&ehci->ipacket, pid, ep, 0, addr, false,
ep = usb_ep_get(dev, pid, endp);
if (ep && ep->type == USB_ENDPOINT_XFER_ISOC) {
usb_packet_setup(&ehci->ipacket, pid, ep, 0, addr, false,