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| author | xidongwang <wangxidong_97@163.com> | 2020-07-05 20:27:38 -0700 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-07-07 10:10:49 +0200 |
| commit | ad155712bb1ea2151944cf06a0e08c315c70c1e3 (patch) | |
| tree | 61cc051b7feed12d5b1d2e4ff2bc1ac8deae42e3 /sound/drivers | |
| parent | d02b10590953429a6dd2d6245df4d8a0a869df66 (diff) | |
| download | lwn-ad155712bb1ea2151944cf06a0e08c315c70c1e3.tar.gz lwn-ad155712bb1ea2151944cf06a0e08c315c70c1e3.zip | |
ALSA: opl3: fix infoleak in opl3
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>
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))) |