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| author |   Sathish Narasimman <nsathish41@gmail.com> | 2020-04-08 10:57:03 +0530 |
|---|---|---|
| committer |   Marcel Holtmann <marcel@holtmann.org> | 2020-04-08 08:16:56 +0200 |
| commit | fcd156ee8bc6a989dbf7e5efbccdc9cdb831fd27 (patch) | |
| tree | 78655072d2cacc5d887603be2200dc3c4050a8a9 | |
| parent | Bluetooth: Simplify / fix return values from tk_request (diff) | |
| download | wireguard-linux-fcd156ee8bc6a989dbf7e5efbccdc9cdb831fd27.tar.xz wireguard-linux-fcd156ee8bc6a989dbf7e5efbccdc9cdb831fd27.zip | |
Bluetooth: btusb: check for NULL in btusb_find_altsetting()
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>
| -rw-r--r-- | drivers/bluetooth/btusb.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 09913cadd1ca..871162790a0e 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -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]; |