[PATCH 4.1 08/43] USB: whci-hcd: add check for dma mapping error

From: Greg Kroah-Hartman
Date: Wed Jan 20 2016 - 18:11:22 EST


4.1-stable review patch. If anyone has any objections, please let me know.

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

From: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>

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@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
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);