From: David Henningsson Date: Fri, 5 Feb 2016 08:05:41 +0000 (+0100) Subject: ALSA: hda - Fix static checker warning in patch_hdmi.c X-Git-Tag: v4.3.6~79 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=49a233653fb2c73745d124ecf66d66bfbb4eedfe;p=thirdparty%2Fkernel%2Fstable.git ALSA: hda - Fix static checker warning in patch_hdmi.c 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 Signed-off-by: David Henningsson Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index d1c74295a3621..3794376fa0765 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -438,7 +438,8 @@ 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;