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xhci: check control context is valid before dereferencing it.
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.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -3261,6 +3261,14 @@ static void xhci_endpoint_reset(struct usb_hcd *hcd,
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/* config ep command clears toggle if add and drop ep flags are set */
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ctrl_ctx = xhci_get_input_control_ctx(cfg_cmd->in_ctx);
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if (!ctrl_ctx) {
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spin_unlock_irqrestore(&xhci->lock, flags);
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xhci_free_command(xhci, cfg_cmd);
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xhci_warn(xhci, "%s: Could not get input context, bad type.\n",
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__func__);
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goto cleanup;
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}
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xhci_setup_input_ctx_for_config_ep(xhci, cfg_cmd->in_ctx, vdev->out_ctx,
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ctrl_ctx, ep_flag, ep_flag);
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xhci_endpoint_copy(xhci, cfg_cmd->in_ctx, vdev->out_ctx, ep_index);
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