This is a note to let you know that I've just added the patch titled
ALSA: control: Avoid kernel warnings from tlv ioctl with numid 0
to the 3.10-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-control-avoid-kernel-warnings-from-tlv-ioctl-with-numid-0.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c0bcdbdff3ff73a54161fca3cb8b6cdbd0bb8762 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@xxxxxxx>
Date: Mon, 18 Jan 2016 14:12:40 +0100
Subject: ALSA: control: Avoid kernel warnings from tlv ioctl with numid 0
From: Takashi Iwai <tiwai@xxxxxxx>
commit c0bcdbdff3ff73a54161fca3cb8b6cdbd0bb8762 upstream.
When a TLV ioctl with numid zero is handled, the driver may spew a
kernel warning with a stack trace at each call. The check was
intended obviously only for a kernel driver, but not for a user
interaction. Let's fix it.
This was spotted by syzkaller fuzzer.
Reported-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/core/control.c | 2 ++
1 file changed, 2 insertions(+)
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -1325,6 +1325,8 @@ static int snd_ctl_tlv_ioctl(struct snd_
return -EFAULT;
if (tlv.length < sizeof(unsigned int) * 2)
return -EINVAL;
+ if (!tlv.numid)
+ return -EINVAL;
down_read(&card->controls_rwsem);
kctl = snd_ctl_find_numid(card, tlv.numid);
if (kctl == NULL) {
Patches currently in stable-queue which might be from tiwai@xxxxxxx are
queue-3.10/alsa-hrtimer-fix-stall-by-hrtimer_cancel.patch
queue-3.10/alsa-timer-harden-slave-timer-list-handling.patch
queue-3.10/alsa-timer-fix-double-unlink-of-active_list.patch
queue-3.10/alsa-control-avoid-kernel-warnings-from-tlv-ioctl-with-numid-0.patch
queue-3.10/alsa-hda-realtek-fix-silent-headphone-output-on-macpro-4-1-v2.patch
queue-3.10/alsa-rme96-fix-unexpected-volume-reset-after-rate-changes.patch
queue-3.10/alsa-hda-set-skl-hda-controller-power-at-freeze-and-thaw.patch
queue-3.10/alsa-hda-add-inverted-dmic-for-packard-bell-dots.patch
queue-3.10/alsa-hda-add-intel-lewisburg-device-ids-audio.patch
queue-3.10/alsa-seq-fix-race-at-timer-setup-and-close.patch
queue-3.10/alsa-pcm-fix-snd_pcm_hw_params-struct-copy-in-compat-mode.patch
queue-3.10/alsa-seq-fix-snd_seq_call_port_info_ioctl-in-compat-mode.patch
queue-3.10/alsa-seq-fix-missing-null-check-at-remove_events-ioctl.patch
queue-3.10/alsa-timer-fix-race-among-timer-ioctls.patch
queue-3.10/alsa-hda-apply-pin-fixup-for-hp-probook-6550b.patch
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