From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 511B94A3F36 for ; Wed, 16 Sep 2026 09:16:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789550220; cv=none; b=nWyU2YzDs1d0hnyBJqkGfQEYDdlhwj2WE/6RZ6K9ez1U7AD4EwFlhfTvw+ADK6d8SO0DUmicslVSZwORKgWU33f9yAVY1WSc6C7Hnro4fxShwKhRwTpq8iZuU4YnP76+AsZUTLXsPHrYYXTUTADcBbF6KpX1FnyWNCHz3TeV6sI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789550220; c=relaxed/simple; bh=Cr2gwqrgRK8bAQxJKE8poJ7dQOp1qGn/OtdRqUG5gwo=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=OLsM8RUqfHhaCNTrtV+xrJj/X9lnMzY8cIyO9LNrzFm7X7zq5X+B+ae2xXfqSKcSgTNooGlvbIPy259nssd8wtNUedy4llcCMZNirKKaQfmhRajEISqbIs3EikVr1fRc7qXg/LJCw4GNHn4yxEnZ5AtEwiMds3AePu529NJG8mg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=TzhsiGgv; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="TzhsiGgv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 052A81F00899; Wed, 16 Sep 2026 09:16:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789550204; bh=+v/+0LGjMW42lNRmdGYbITlu2HwEyRKY3UAlhjGImNo=; h=Subject:To:Cc:From:Date; b=TzhsiGgvnQlwGjKejxMUCm5JPaOTeVMf6YZOJL0lXSjqTc3+E1kYFWozEQVT17VkG lzdAbwCn0yzKt1dmYb+yJf4nah747//Lzr3hv7Lwgic5Rqkx/uZP/Xp2XA2ZZ5R6yx 9emlKrnBORBsStmfFJJ65UAdOi7aHM2CDBMJ1voI= Subject: FAILED: patch "[PATCH] ALSA: usbusx2y: validate URB actual_length in interrupt" failed to apply to 6.1-stable tree To: tristan@talencesecurity.com,tiwai@suse.de Cc: From: Date: Wed, 16 Sep 2026 10:14:45 +0100 Message-ID: <2026091645-overstep-marine-1c54@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=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.1-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-6.1.y git checkout FETCH_HEAD git cherry-pick -x 8f5ef203abda9dd36b2af473c7b737d544f807bd # git commit -s git send-email --to '' --in-reply-to '2026091645-overstep-marine-1c54@gregkh' --subject-prefix 'PATCH 6.1.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 8f5ef203abda9dd36b2af473c7b737d544f807bd Mon Sep 17 00:00:00 2001 From: Tristan Madani Date: Fri, 4 Sep 2026 20:58:26 +0000 Subject: [PATCH] ALSA: usbusx2y: validate URB actual_length in interrupt callback i_usx2y_in04_int() processes the interrupt URB data without checking urb->actual_length. A short transfer from a malfunctioning device would cause the handler to process uninitialized heap data from the kmalloc-allocated in04_buf, which is then copied to the mmap-accessible ctl_snapshot[] array. Fix by using kzalloc() for in04_buf to zero-initialize the buffer, and adding an actual_length check to skip processing on short transfers while still resubmitting the URB. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Signed-off-by: Tristan Madani Link: https://patch.msgid.link/20260904205826.4071119-2-tristmd@gmail.com Signed-off-by: Takashi Iwai diff --git a/sound/usb/usx2y/usbusx2y.c b/sound/usb/usx2y/usbusx2y.c index 200b708aacd6..108f9bddf9aa 100644 --- a/sound/usb/usx2y/usbusx2y.c +++ b/sound/usb/usx2y/usbusx2y.c @@ -189,6 +189,9 @@ static void i_usx2y_in04_int(struct urb *urb) return; } + if (urb->actual_length < USX2Y_IN04_SIZE) + goto resubmit; + if (us428ctls) { diff = -1; if (us428ctls->ctl_snapshot_last == -2) { @@ -253,6 +256,7 @@ static void i_usx2y_in04_int(struct urb *urb) if (err) dev_err(&urb->dev->dev, "in04_int() usb_submit_urb err=%i\n", err); +resubmit: urb->dev = usx2y->dev; usb_submit_urb(urb, GFP_ATOMIC); } @@ -305,7 +309,7 @@ int usx2y_in04_init(struct usx2ydev *usx2y) goto error; } - usx2y->in04_buf = kmalloc(USX2Y_IN04_SIZE, GFP_KERNEL); + usx2y->in04_buf = kzalloc(USX2Y_IN04_SIZE, GFP_KERNEL); if (!usx2y->in04_buf) { err = -ENOMEM; goto error;