3.13.11.11 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Takashi Iwai <[email protected]> commit 317168d0c766defd14b3d0e9c2c4a9a258b803ee upstream. In compat mode, we copy each field of snd_pcm_status struct but don't touch the reserved fields, and this leaves uninitialized values there. Meanwhile the native ioctl does zero-clear the whole structure, so we should follow the same rule in compat mode, too. Reported-by: Pierre-Louis Bossart <[email protected]> Signed-off-by: Takashi Iwai <[email protected]> Signed-off-by: Kamal Mostafa <[email protected]> --- sound/core/pcm_compat.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/core/pcm_compat.c b/sound/core/pcm_compat.c index af49721..c4ac3c1 100644 --- a/sound/core/pcm_compat.c +++ b/sound/core/pcm_compat.c @@ -206,6 +206,8 @@ static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream, if (err < 0) return err; + if (clear_user(src, sizeof(*src))) + return -EFAULT; if (put_user(status.state, &src->state) || compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) || compat_put_timespec(&status.tstamp, &src->tstamp) || -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
