From: David Henningsson <david.henningsson@xxxxxxxxxxxxx>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
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.carpenter@xxxxxxxxxx>
Signed-off-by: David Henningsson <david.henningsson@xxxxxxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
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 830021f4aa06..c527d9756ef5 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -394,7 +394,8 @@ 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;
--
2.7.1
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