diff options
| author | xidongwang <wangxidong_97@163.com> | 2020-07-05 20:27:38 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-16 08:16:42 +0200 |
| commit | 3496a18a1c3b19c18226a9ae02781113de3b472e (patch) | |
| tree | d33528a1ef84d74d3d847ed21b9a5340e62bb262 /sound/drivers | |
| parent | 4a215725dec7da679ab448294935125fb364f2ba (diff) | |
ALSA: opl3: fix infoleak in opl3
commit ad155712bb1ea2151944cf06a0e08c315c70c1e3 upstream.
The stack object “info” in snd_opl3_ioctl() has a leaking problem.
It has 2 padding bytes which are not initialized and leaked via
“copy_to_user”.
Signed-off-by: xidongwang <wangxidong_97@163.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1594006058-30362-1-git-send-email-wangxidong_97@163.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/drivers')
| -rw-r--r-- | sound/drivers/opl3/opl3_synth.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/drivers/opl3/opl3_synth.c b/sound/drivers/opl3/opl3_synth.c index e69a4ef0d6bd..08c10ac9d6c8 100644 --- a/sound/drivers/opl3/opl3_synth.c +++ b/sound/drivers/opl3/opl3_synth.c @@ -91,6 +91,8 @@ int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file, { struct snd_dm_fm_info info; + memset(&info, 0, sizeof(info)); + info.fm_mode = opl3->fm_mode; info.rhythm = opl3->rhythm; if (copy_to_user(argp, &info, sizeof(struct snd_dm_fm_info))) |