This is a note to let you know that I've just added the patch titled

ALSA: usb-audio: Add check return value for usb_string()

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: alsa-usb-audio-add-check-return-value-for-usb_string.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 89b89d121ffcf8d9546633b98ded9d18b8f75891 Mon Sep 17 00:00:00 2001

From: Jaejoong Kim climbbb.kim@gmail.com Date: Mon, 4 Dec 2017 15:31:49 +0900 Subject: ALSA: usb-audio: Add check return value for usb_string()

From: Jaejoong Kim climbbb.kim@gmail.com

commit 89b89d121ffcf8d9546633b98ded9d18b8f75891 upstream.

snd_usb_copy_string_desc() returns zero if usb_string() fails. In case of failure, we need to check the snd_usb_copy_string_desc()'s return value and add an exception case

Signed-off-by: Jaejoong Kim climbbb.kim@gmail.com Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- sound/usb/mixer.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -2172,13 +2172,14 @@ static int parse_audio_selector_unit(str if (len) ; else if (nameid) - snd_usb_copy_string_desc(state, nameid, kctl->id.name, + len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name)); - else { + else len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 0); - if (!len) - strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name)); + + if (!len) { + strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));

if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) append_ctl_name(kctl, " Clock Source");

Patches currently in stable-queue which might be from climbbb.kim@gmail.com are

queue-4.9/alsa-usb-audio-add-check-return-value-for-usb_string.patch queue-4.9/alsa-usb-audio-fix-out-of-bound-error.patch