ALSA: hda/hdmi: clamp sad_count in ELD proc write handler

snd_hdmi_write_eld_info() parses a "sad_count N" line from the
root-writable ELD proc interface and assigns N directly to
e->sad_count with no upper bound, unlike the per-index "sadN_*" lines
a few lines below which are already bounded to ELD_MAX_SAD.

snd_hdmi_eld_update_pcm_info() later iterates
"for (i = 0; i < e->sad_count; i++)" over the fixed
e->sad[ELD_MAX_SAD] array, so an oversized sad_count read from the
proc file causes it to walk past the array.

Reject sad_count values above ELD_MAX_SAD, matching the existing
per-index guard.

Fixes: acb059938810 ("ALSA: hda - ELD proc interface write updates")
Cc: stable@vger.kernel.org
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://patch.msgid.link/20261008085133.9528-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

0 files changed, 0 insertions, 0 deletions