ALSA: hdsp - info leak in snd_hdsp_hwdep_ioctl()

In GCC the sizeof(hdsp_version) is 8 because there is a 2 byte hole at
the end of the struct after ->firmware_rev.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/rme9652/hdsp.c b/sound/pci/rme9652/hdsp.c
index 4f255dfee4504454702bfdec305b1b72820a26ac..f59a321a6d6af04d6dce32751410e4eb3f9d9df0 100644 (file)
--- a/sound/pci/rme9652/hdsp.c
+++ b/sound/pci/rme9652/hdsp.c
@@ -4845,6 +4845,7 @@ static int snd_hdsp_hwdep_ioctl(struct snd_hwdep *hw, struct file *file, unsigne
                        if ((err = hdsp_get_iobox_version(hdsp)) < 0)
                                return err;
                }
+               memset(&hdsp_version, 0, sizeof(hdsp_version));
                hdsp_version.io_type = hdsp->io_type;
                hdsp_version.firmware_rev = hdsp->firmware_rev;
                if ((err = copy_to_user(argp, &hdsp_version, sizeof(hdsp_version))))