From 84218892f05515d20347fde4506e1944eb11cb25 Mon Sep 17 00:00:00 2001 From: Mauro Matteo Cascella Date: Tue, 5 Jul 2022 19:47:34 +0200 Subject: usb/hcd-xhci: check slotid in xhci_wakeup_endpoint() This prevents an OOB read (followed by an assertion failure in xhci_kick_ep) when slotid > xhci->numslots. Reported-by: Soul Chen Signed-off-by: Mauro Matteo Cascella Message-Id: <20220705174734.2348829-1-mcascell@redhat.com> Signed-off-by: Gerd Hoffmann --- hw/usb/hcd-xhci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'hw/usb/hcd-xhci.c') diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c index 0cd0a5e540..296cc6c8e6 100644 --- a/hw/usb/hcd-xhci.c +++ b/hw/usb/hcd-xhci.c @@ -3269,7 +3269,8 @@ static void xhci_wakeup_endpoint(USBBus *bus, USBEndpoint *ep, DPRINTF("%s\n", __func__); slotid = ep->dev->addr; - if (slotid == 0 || !xhci->slots[slotid-1].enabled) { + if (slotid == 0 || slotid > xhci->numslots || + !xhci->slots[slotid - 1].enabled) { DPRINTF("%s: oops, no slot for dev %d\n", __func__, ep->dev->addr); return; } -- cgit v1.2.3-55-g7522