From: Mathias Nyman mathias.nyman@linux.intel.com
[ Upstream commit 597899d2f7c5619c87185ee7953d004bd37fd0eb ]
Don't dereference ctrl_ctx before checking it's valid. Issue reported by Klockwork
Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Link: https://lore.kernel.org/r/20210406070208.3406266-3-mathias.nyman@linux.intel... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/host/xhci.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index c449de6164b1..384076e169f4 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -3227,6 +3227,14 @@ static void xhci_endpoint_reset(struct usb_hcd *hcd,
/* config ep command clears toggle if add and drop ep flags are set */ ctrl_ctx = xhci_get_input_control_ctx(cfg_cmd->in_ctx); + if (!ctrl_ctx) { + spin_unlock_irqrestore(&xhci->lock, flags); + xhci_free_command(xhci, cfg_cmd); + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + goto cleanup; + } + xhci_setup_input_ctx_for_config_ep(xhci, cfg_cmd->in_ctx, vdev->out_ctx, ctrl_ctx, ep_flag, ep_flag); xhci_endpoint_copy(xhci, cfg_cmd->in_ctx, vdev->out_ctx, ep_index);