This is a note to let you know that I've just added the patch titled
ALSA: rawmidi: Remove kernel WARNING for NULL user-space buffer check
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-rawmidi-remove-kernel-warning-for-null-user-space-buffer-check.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 cc85f7a634cfaf9f0713c6aa06d08817424db37a Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@xxxxxxx>
Date: Mon, 1 Feb 2016 12:04:55 +0100
Subject: ALSA: rawmidi: Remove kernel WARNING for NULL user-space buffer check
From: Takashi Iwai <tiwai@xxxxxxx>
commit cc85f7a634cfaf9f0713c6aa06d08817424db37a upstream.
NULL user-space buffer can be passed even in a normal path, thus it's
not good to spew a kernel warning with stack trace at each time.
Just drop snd_BUG_ON() macro usage there.
BugLink: http://lkml.kernel.org/r/CACT4Y+YfVJ3L+q0i-4vyQVyyPD7V=OMX0PWPi29x9Bo3QaBLdw@xxxxxxxxxxxxxx
Reported-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/core/rawmidi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -1224,7 +1224,7 @@ static long snd_rawmidi_kernel_write1(st
long count1, result;
struct snd_rawmidi_runtime *runtime = substream->runtime;
- if (snd_BUG_ON(!kernelbuf && !userbuf))
+ if (!kernelbuf && !userbuf)
return -EINVAL;
if (snd_BUG_ON(!runtime->buffer))
return -EINVAL;
Patches currently in stable-queue which might be from tiwai@xxxxxxx are
queue-4.4/alsa-seq-fix-race-at-closing-in-virmidi-driver.patch
queue-4.4/alsa-hda-fix-bad-dereference-of-jack-object.patch
queue-4.4/alsa-usb-audio-add-quirk-for-microsoft-lifecam-hd-6000.patch
queue-4.4/alsa-rawmidi-remove-kernel-warning-for-null-user-space-buffer-check.patch
queue-4.4/alsa-usb-audio-fix-oppo-ha-1-vendor-id.patch
queue-4.4/alsa-timer-fix-race-at-concurrent-reads.patch
queue-4.4/alsa-hda-realtek-support-dell-headset-mode-for-alc225.patch
queue-4.4/alsa-hda-fix-static-checker-warning-in-patch_hdmi.c.patch
queue-4.4/alsa-seq-fix-lockdep-warnings-due-to-double-mutex-locks.patch
queue-4.4/alsa-usb-audio-fix-teac-ud-501-ud-503-nt-503-usb-delay.patch
queue-4.4/alsa-timer-fix-wrong-instance-passed-to-slave-callbacks.patch
queue-4.4/alsa-hda-disable-dynamic-clock-gating-on-broxton-before-reset.patch
queue-4.4/alsa-hda-realtek-support-headset-mode-for-alc225.patch
queue-4.4/alsa-hda-implement-loopback-control-switch-for-realtek-and-other-codecs.patch
queue-4.4/alsa-hda-realtek-new-codec-support-of-alc225.patch
queue-4.4/alsa-seq-degrade-the-error-message-for-too-many-opens.patch
queue-4.4/alsa-compress-disable-get_codec_caps-ioctl-for-some-architectures.patch
queue-4.4/alsa-rawmidi-make-snd_rawmidi_transmit-race-free.patch
queue-4.4/alsa-hda-fix-speaker-output-from-vaio-aio-machines.patch
queue-4.4/alsa-bebob-use-a-signed-return-type-for-get_formation_index.patch
queue-4.4/alsa-add-missing-dependency-on-config_snd_timer.patch
queue-4.4/alsa-dummy-implement-timer-backend-switching-more-safely.patch
queue-4.4/alsa-dummy-disable-switching-timer-backend-via-sysfs.patch
queue-4.4/alsa-seq-fix-incorrect-sanity-check-at-snd_seq_oss_synth_cleanup.patch
queue-4.4/alsa-seq-fix-yet-another-races-among-alsa-timer-accesses.patch
queue-4.4/alsa-usb-audio-avoid-freeing-umidi-object-twice.patch
queue-4.4/revert-alsa-hda-fix-noise-on-gigabyte-z170x-mobo.patch
queue-4.4/alsa-hda-add-fixup-for-mac-mini-7-1-model.patch
queue-4.4/alsa-usb-audio-add-native-dsd-support-for-ps-audio-nuwave-dac.patch
queue-4.4/alsa-timer-fix-leftover-link-at-closing.patch
queue-4.4/alsa-rawmidi-fix-race-at-copying-updating-the-position.patch
queue-4.4/alsa-pcm-fix-potential-deadlock-in-oss-emulation.patch
queue-4.4/alsa-timer-fix-link-corruption-due-to-double-start-or-stop.patch
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