From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D4CD01FCFE6 for ; Mon, 2 Dec 2024 11:00:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733137203; cv=none; b=eMthDT2o9Cs14g5QgVjbZ4LSaAytQARo/JYz4+KHGt1RLVvRpM1K5unOXu4Xpx2BqvonSGpKBBEsoxlbUGMgsQ2FdcPHgRIPHZFVubet/Yym2d0OXrYwaeluWDUcelaIkw97I/y7+FcWD1GOHU5KzeBGKsdwszKKMSNB3dUeuyI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733137203; c=relaxed/simple; bh=xaZqUQVZK7wKblgTY04dnSnHb3E3jwDeGEovTa8837c=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=dL6Kc/EWDmQ8kebawolq8YOOyprjSGh9Aqm2sZ/TOYQYbb+xAm4rFXTRLZqjLYM4wEcu3p/+d7j1IYnKO7dZ8zVS9QSDLGFWOwH7vfAs8ANiDvJpox4kHRUM5ielsUPD59tJyr424+Y/UE5rKTMWlCqSjJ10i8Cx4sLq2U6Yk3E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=aziZLZ8T; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="aziZLZ8T" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3D8D6C4CED1; Mon, 2 Dec 2024 11:00:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1733137203; bh=xaZqUQVZK7wKblgTY04dnSnHb3E3jwDeGEovTa8837c=; h=Subject:To:Cc:From:Date:From; b=aziZLZ8T4Bsun/9909Er8hQZrbhErrNHXVxQ8ae4vr5cBnSkejb1fFHHuqldjrsq8 bXLl1mHF1pHQ9I7/T7pjj0Fd870SHLYiuqCRuFFvSc8ABp66C/VCaAPJJEjArh+i4q v7hGCzEZquMIYrpCVRFj/DNY+beG+m6AT7R/xod0= Subject: FAILED: patch "[PATCH] ALSA: usb-audio: Fix potential out-of-bound accesses for" failed to apply to 6.6-stable tree To: bsevens@google.com,tiwai@suse.de Cc: From: Date: Mon, 02 Dec 2024 12:00:00 +0100 Message-ID: <2024120200-dangling-delegate-dfab@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x b909df18ce2a998afef81d58bbd1a05dc0788c40 # git commit -s git send-email --to '' --in-reply-to '2024120200-dangling-delegate-dfab@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b909df18ce2a998afef81d58bbd1a05dc0788c40 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Beno=C3=AEt=20Sevens?= Date: Wed, 20 Nov 2024 12:41:44 +0000 Subject: [PATCH] ALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devices MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A bogus device can provide a bNumConfigurations value that exceeds the initial value used in usb_get_configuration for allocating dev->config. This can lead to out-of-bounds accesses later, e.g. in usb_destroy_configuration. Signed-off-by: Benoît Sevens Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@kernel.org Link: https://patch.msgid.link/20241120124144.3814457-1-bsevens@google.com Signed-off-by: Takashi Iwai diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index cbfbb064a9c2..8bc959b60be3 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -555,6 +555,7 @@ int snd_usb_create_quirk(struct snd_usb_audio *chip, static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf) { struct usb_host_config *config = dev->actconfig; + struct usb_device_descriptor new_device_descriptor; int err; if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD || @@ -566,10 +567,14 @@ static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interfac if (err < 0) dev_dbg(&dev->dev, "error sending boot message: %d\n", err); err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, - &dev->descriptor, sizeof(dev->descriptor)); - config = dev->actconfig; + &new_device_descriptor, sizeof(new_device_descriptor)); if (err < 0) dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err); + if (new_device_descriptor.bNumConfigurations > dev->descriptor.bNumConfigurations) + dev_dbg(&dev->dev, "error too large bNumConfigurations: %d\n", + new_device_descriptor.bNumConfigurations); + else + memcpy(&dev->descriptor, &new_device_descriptor, sizeof(dev->descriptor)); err = usb_reset_configuration(dev); if (err < 0) dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err); @@ -901,6 +906,7 @@ static void mbox2_setup_48_24_magic(struct usb_device *dev) static int snd_usb_mbox2_boot_quirk(struct usb_device *dev) { struct usb_host_config *config = dev->actconfig; + struct usb_device_descriptor new_device_descriptor; int err; u8 bootresponse[0x12]; int fwsize; @@ -936,10 +942,14 @@ static int snd_usb_mbox2_boot_quirk(struct usb_device *dev) dev_dbg(&dev->dev, "device initialised!\n"); err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, - &dev->descriptor, sizeof(dev->descriptor)); - config = dev->actconfig; + &new_device_descriptor, sizeof(new_device_descriptor)); if (err < 0) dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err); + if (new_device_descriptor.bNumConfigurations > dev->descriptor.bNumConfigurations) + dev_dbg(&dev->dev, "error too large bNumConfigurations: %d\n", + new_device_descriptor.bNumConfigurations); + else + memcpy(&dev->descriptor, &new_device_descriptor, sizeof(dev->descriptor)); err = usb_reset_configuration(dev); if (err < 0) @@ -1249,6 +1259,7 @@ static void mbox3_setup_defaults(struct usb_device *dev) static int snd_usb_mbox3_boot_quirk(struct usb_device *dev) { struct usb_host_config *config = dev->actconfig; + struct usb_device_descriptor new_device_descriptor; int err; int descriptor_size; @@ -1262,10 +1273,14 @@ static int snd_usb_mbox3_boot_quirk(struct usb_device *dev) dev_dbg(&dev->dev, "MBOX3: device initialised!\n"); err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, - &dev->descriptor, sizeof(dev->descriptor)); - config = dev->actconfig; + &new_device_descriptor, sizeof(new_device_descriptor)); if (err < 0) dev_dbg(&dev->dev, "MBOX3: error usb_get_descriptor: %d\n", err); + if (new_device_descriptor.bNumConfigurations > dev->descriptor.bNumConfigurations) + dev_dbg(&dev->dev, "MBOX3: error too large bNumConfigurations: %d\n", + new_device_descriptor.bNumConfigurations); + else + memcpy(&dev->descriptor, &new_device_descriptor, sizeof(dev->descriptor)); err = usb_reset_configuration(dev); if (err < 0)