USB: whci-hcd: add check for dma mapping error

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@ispras.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/usb/host/whci/qset.c b/drivers/usb/host/whci/qset.c
index 76083ae..412b4fe 100644 (file)
--- 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);