diff options
| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2016-01-26 17:50:12 +0200 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-02-15 15:45:34 -0500 |
| commit | 8552bea30320cc866c7fb5d9a687c3e6d15fb5c1 (patch) | |
| tree | 3596aa2977b8c675a411acac8ec98d149d111c03 | |
| parent | 4c54b01e7221db1d14ef2506ac0b81f9ff69e26f (diff) | |
xhci: Fix list corruption in urb dequeue at host removal
[ Upstream commit 5c82171167adb8e4ac77b91a42cd49fb211a81a0 ]
xhci driver frees data for all devices, both usb2 and and usb3 the
first time usb_remove_hcd() is called, including td_list and and xhci_ring
structures.
When usb_remove_hcd() is called a second time for the second xhci bus it
will try to dequeue all pending urbs, and touches td_list which is already
freed for that endpoint.
Cc: <stable@vger.kernel.org>
Reported-by: Joe Lawrence <joe.lawrence@stratus.com>
Tested-by: Joe Lawrence <joe.lawrence@stratus.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
| -rw-r--r-- | drivers/usb/host/xhci.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index f6bb118e4501..910f7fac031f 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1559,7 +1559,9 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, "HW died, freeing TD."); urb_priv = urb->hcpriv; - for (i = urb_priv->td_cnt; i < urb_priv->length; i++) { + for (i = urb_priv->td_cnt; + i < urb_priv->length && xhci->devs[urb->dev->slot_id]; + i++) { td = urb_priv->td[i]; if (!list_empty(&td->td_list)) list_del_init(&td->td_list); |