mv_u3d_req_to_trb() does not check for dma mapping errors.
Found by Linux Driver Verification project (linuxtesting.org).
v2: split fix and clenup to separate patches.
Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
---
drivers/usb/gadget/udc/mv_u3d_core.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/usb/gadget/udc/mv_u3d_core.c b/drivers/usb/gadget/udc/mv_u3d_core.c
index b9e19a591322..6f3be0ba9ac8 100644
--- a/drivers/usb/gadget/udc/mv_u3d_core.c
+++ b/drivers/usb/gadget/udc/mv_u3d_core.c
@@ -462,6 +462,12 @@ static int mv_u3d_req_to_trb(struct mv_u3d_req *req)
req->trb_head->trb_hw,
trb_num * sizeof(*trb_hw),
DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(u3d->gadget.dev.parent,
+ req->trb_head->trb_dma)) {
+ kfree(req->trb_head->trb_hw);
+ kfree(req->trb_head);
+ return -EFAULT;
+ }
req->chain = 1;
}
--
2.7.4
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