From: Albert Wang albertccwang@google.com
commit 26288448120b28af1dfd85a6fa6b6d55a16c7f2f upstream.
In the endpoint interrupt functions dwc3_gadget_endpoint_transfer_in_progress() and dwc3_gadget_endpoint_trbs_complete() will dereference the endpoint descriptor. But it could be cleared in __dwc3_gadget_ep_disable() when accessory disconnected. So we need to check whether it is null or not before dereferencing it.
Fixes: f09ddcfcb8c5 ("usb: dwc3: gadget: Prevent EP queuing while stopping transfers") Cc: stable stable@vger.kernel.org Reviewed-by: Jack Pham quic_jackp@quicinc.com Signed-off-by: Albert Wang albertccwang@google.com Link: https://lore.kernel.org/r/20211109092642.3507692-1-albertccwang@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/dwc3/gadget.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -3263,6 +3263,9 @@ static bool dwc3_gadget_endpoint_trbs_co struct dwc3 *dwc = dep->dwc; bool no_started_trb = true;
+ if (!dep->endpoint.desc) + return no_started_trb; + dwc3_gadget_ep_cleanup_completed_requests(dep, event, status);
if (dep->flags & DWC3_EP_END_TRANSFER_PENDING) @@ -3310,6 +3313,9 @@ static void dwc3_gadget_endpoint_transfe { int status = 0;
+ if (!dep->endpoint.desc) + return; + if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) dwc3_gadget_endpoint_frame_from_event(dep, event);