This is a note to let you know that I've just added the patch titled
ALSA: hdspm: Fix zero-division
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-hdspm-fix-zero-division.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c1099c3294c2344110085a38c50e478a5992b368 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@xxxxxxx>
Date: Mon, 29 Feb 2016 14:32:42 +0100
Subject: ALSA: hdspm: Fix zero-division
From: Takashi Iwai <tiwai@xxxxxxx>
commit c1099c3294c2344110085a38c50e478a5992b368 upstream.
HDSPM driver contains a code issuing zero-division potentially in
system sample rate ctl code. This patch fixes it by not processing
a zero or invalid rate value as a divisor, as well as excluding the
invalid value to be passed via the given ctl element.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/pci/rme9652/hdspm.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -1601,6 +1601,9 @@ static void hdspm_set_dds_value(struct h
{
u64 n;
+ if (snd_BUG_ON(rate <= 0))
+ return;
+
if (rate >= 112000)
rate /= 4;
else if (rate >= 56000)
@@ -2215,6 +2218,8 @@ static int hdspm_get_system_sample_rate(
} else {
/* slave mode, return external sample rate */
rate = hdspm_external_sample_rate(hdspm);
+ if (!rate)
+ rate = hdspm->system_sample_rate;
}
}
@@ -2260,7 +2265,10 @@ static int snd_hdspm_put_system_sample_r
ucontrol)
{
struct hdspm *hdspm = snd_kcontrol_chip(kcontrol);
+ int rate = ucontrol->value.integer.value[0];
+ if (rate < 27000 || rate > 207000)
+ return -EINVAL;
hdspm_set_dds_value(hdspm, ucontrol->value.integer.value[0]);
return 0;
}
Patches currently in stable-queue which might be from tiwai@xxxxxxx are
queue-4.4/alsa-hdspm-fix-zero-division.patch
queue-4.4/alsa-ctl-fix-ioctls-for-x32-abi.patch
queue-4.4/alsa-hdspm-fix-wrong-boolean-ctl-value-accesses.patch
queue-4.4/alsa-pcm-fix-ioctls-for-x32-abi.patch
queue-4.4/alsa-hdsp-fix-wrong-boolean-ctl-value-accesses.patch
queue-4.4/alsa-seq-oss-don-t-drain-at-closing-a-client.patch
queue-4.4/alsa-hda-fix-mic-issues-on-acer-aspire-e1-472.patch
queue-4.4/alsa-timer-fix-ioctls-for-x32-abi.patch
queue-4.4/alsa-usb-audio-add-a-quirk-for-plantronics-da45.patch
queue-4.4/alsa-timer-fix-broken-compat-timer-user-status-ioctl.patch
queue-4.4/alsa-rawmidi-fix-ioctls-x32-abi.patch
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