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DM USB: fix potential crash risk due to null pointer 

Fix potential risk to crash due to null pointer.

Tracked-On: #3612
Signed-off-by: Xiaoguang Wu <xiaoguang.wu@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Xiaoguang Wu 2019-08-22 16:34:38 +08:00 committed by ACRN System Integration
parent 4a71a16a13
commit fc3d19bee4
1 changed files with 5 additions and 0 deletions
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5
devicemodel/hw/platform/usb_pmapper.c
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@ -962,6 +962,11 @@ usb_dev_request(void *pdata, struct usb_data_xfer *xfer)
blk = usb_dev_prepare_ctrl_xfer(xfer);
data = blk ? blk->buf : NULL;
if (data == NULL) {
xfer->status = USB_ERR_IOERROR;
UPRINTF(LFTL, "%s unexpected NULL data\r\n", __func__);
goto out;
}
UPRINTF(LDBG, "%d-%s: urb: type 0x%x req 0x%x val 0x%x idx %d len %d "
"data %d\r\n", udev->info.path.bus,