linux-kernel - [PATCH 3.4 068/125] USB: whci-hcd: add check for dma mapping error

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Date:   Wed, 12 Oct 2016 20:33:04 +0800
From:   lizf@...nel.org
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Alexey Khoroshilov <khoroshilov@...ras.ru>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Zefan Li <lizefan@...wei.com>
Subject: [PATCH 3.4 068/125] USB: whci-hcd: add check for dma mapping error

From: Alexey Khoroshilov <khoroshilov@...ras.ru>

3.4.113-rc1 review patch.  If anyone has any objections, please let me know.

------------------


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 <khoroshilov@...ras.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Zefan Li <lizefan@...wei.com>
---
 drivers/usb/host/whci/qset.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/host/whci/qset.c b/drivers/usb/host/whci/qset.c
index 76083ae..412b4fe 100644
--- 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 whc *whc, struct whc_std *std, gfp_t mem_f
 	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);
-- 
1.9.1