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Bluetooth: btusb: check for NULL in btusb_find_altsetting()

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The new btusb_find_altsetting() dereferences it without checking
the check is added in this patch

Signed-off-by: Sathish Narasimman <sathish.narasimman@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Sathish Narasimman 2020-04-08 10:57:03 +05:30 committed by Marcel Holtmann
parent d1d900f822
commit fcd156ee8b
1 changed files with 3 additions and 0 deletions
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3
drivers/bluetooth/btusb.c
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@ -1622,6 +1622,9 @@ static struct usb_host_interface *btusb_find_altsetting(struct btusb_data *data,
BT_DBG("Looking for Alt no :%d", alt);
if (!intf)
return NULL;
for (i = 0; i < intf->num_altsetting; i++) {
if (intf->altsetting[i].desc.bAlternateSetting == alt)
return &intf->altsetting[i];