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

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commit f9fa1887dc 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>
This commit is contained in:
Alexey Khoroshilov 2015-11-21 00:36:44 +03:00 committed by Ben Hutchings
parent 485274cf9a
commit 7d190cac70
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/host/whci/qset.c
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@ -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);