From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alexey Khoroshilov Subject: [PATCH 4.1 08/43] USB: whci-hcd: add check for dma mapping error Date: Wed, 20 Jan 2016 15:10:15 -0800 Message-Id: <20160120215928.143475750@linuxfoundation.org> In-Reply-To: <20160120215926.787430744@linuxfoundation.org> References: <20160120215926.787430744@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: 4.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alexey Khoroshilov commit f9fa1887dcf26bd346665a6ae3d3f53dec54cba1 upstream. qset_fill_page_list() do not check for dma mapping errors. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/whci/qset.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/usb/host/whci/qset.c +++ b/drivers/usb/host/whci/qset.c @@ -377,6 +377,10 @@ static int qset_fill_page_list(struct wh if (std->pl_virt == NULL) return -ENOMEM; std->dma_addr = dma_map_single(whc->wusbhc.dev, std->pl_virt, pl_len, DMA_TO_DEVICE); + if (dma_mapping_error(whc->wusbhc.dev, std->dma_addr)) { + kfree(std->pl_virt); + return -EFAULT; + } for (p = 0; p < std->num_pointers; p++) { std->pl_virt[p].buf_ptr = cpu_to_le64(dma_addr);