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| author | Malcolm Priestley <tvboxspy@gmail.com> | 2017-04-22 11:14:57 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-28 12:02:05 +0200 |
| commit | 12ecd24ef93277e4e5feaf27b0b18f2d3828bc5e (patch) | |
| tree | c84b40367259cd7845e95f3d6df6065dbce800b0 /drivers/staging/vt6656 | |
| parent | 00916cfc61779a80e378f431d668a4508421b330 (diff) | |
| download | linux-12ecd24ef93277e4e5feaf27b0b18f2d3828bc5e.tar.gz linux-12ecd24ef93277e4e5feaf27b0b18f2d3828bc5e.tar.bz2 linux-12ecd24ef93277e4e5feaf27b0b18f2d3828bc5e.zip | |
staging: vt6656: use off stack for out buffer USB transfers.
Since 4.9 mandated USB buffers be heap allocated this causes the driver
to fail.
Since there is a wide range of buffer sizes use kmemdup to create
allocated buffer.
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Cc: <stable@vger.kernel.org> # v4.9+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/vt6656')
| -rw-r--r-- | drivers/staging/vt6656/usbpipe.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/staging/vt6656/usbpipe.c b/drivers/staging/vt6656/usbpipe.c index 9ad8503d2589..ea5a7c65ad1b 100644 --- a/drivers/staging/vt6656/usbpipe.c +++ b/drivers/staging/vt6656/usbpipe.c @@ -47,15 +47,25 @@ int vnt_control_out(struct vnt_private *priv, u8 request, u16 value, u16 index, u16 length, u8 *buffer) { int status = 0; + u8 *usb_buffer; if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) return STATUS_FAILURE; mutex_lock(&priv->usb_lock); + usb_buffer = kmemdup(buffer, length, GFP_KERNEL); + if (!usb_buffer) { + mutex_unlock(&priv->usb_lock); + return -ENOMEM; + } + status = usb_control_msg(priv->usb, - usb_sndctrlpipe(priv->usb, 0), request, 0x40, value, - index, buffer, length, USB_CTL_WAIT); + usb_sndctrlpipe(priv->usb, 0), + request, 0x40, value, + index, usb_buffer, length, USB_CTL_WAIT); + + kfree(usb_buffer); mutex_unlock(&priv->usb_lock); |