4.2.8-ckt5 -stable review patch. If anyone has any objections, please let me
know.
---8<------------------------------------------------------------
From: David Henningsson <david.hennings...@canonical.com>
commit 360a8245680053619205a3ae10e6bfe624a5da1d upstream.
The static checker warning is:
sound/pci/hda/patch_hdmi.c:460 hdmi_eld_ctl_get()
error: __memcpy() 'eld->eld_buffer' too small (256 vs 512)
I have a hard time figuring out if this can ever cause an information leak
(I don't think so), but nonetheless it does not hurt to increase the
robustness of the code.
Fixes: 68e03de98507 ('ALSA: hda - hdmi: Do not expose eld data when eld is
invalid')
Reported-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: David Henningsson <david.hennings...@canonical.com>
Signed-off-by: Takashi Iwai <ti...@suse.de>
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
---
sound/pci/hda/patch_hdmi.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 9d1f91d..1383ce4 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -433,7 +433,8 @@ static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
eld = &per_pin->sink_eld;
mutex_lock(&per_pin->lock);
- if (eld->eld_size > ARRAY_SIZE(ucontrol->value.bytes.data)) {
+ if (eld->eld_size > ARRAY_SIZE(ucontrol->value.bytes.data) ||
+ eld->eld_size > ELD_MAX_SIZE) {
mutex_unlock(&per_pin->lock);
snd_BUG();
return -EINVAL;
--
2.7.0
