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 stable@vger.kernel.org.

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 fcbe4873089c84da641df75cda9cac2e9addbb4b # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024021912-plastic-bannister-f6dc@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^..

Possible dependencies:

fcbe4873089c ("ASoC: SOF: IPC3: fix message bounds on ipc ops") 12c41c779fad ("ASoC: SOF: Refactor rx function for fuzzing") 989a3e447917 ("ASoC: SOF: ipc3: Check for upper size limit for the received message")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From fcbe4873089c84da641df75cda9cac2e9addbb4b Mon Sep 17 00:00:00 2001 From: Curtis Malainey cujomalainey@chromium.org Date: Tue, 13 Feb 2024 14:38:34 +0200 Subject: [PATCH] ASoC: SOF: IPC3: fix message bounds on ipc ops MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

commit 74ad8ed65121 ("ASoC: SOF: ipc3: Implement rx_msg IPC ops") introduced a new allocation before the upper bounds check in do_rx_work. As a result A DSP can cause bad allocations if spewing garbage.

Fixes: 74ad8ed65121 ("ASoC: SOF: ipc3: Implement rx_msg IPC ops") Reported-by: Tim Van Patten timvp@google.com Cc: stable@vger.kernel.org Signed-off-by: Curtis Malainey cujomalainey@chromium.org Reviewed-by: Péter Ujfalusi peter.ujfalusi@linux.intel.com Reviewed-by: Daniel Baluta daniel.baluta@nxp.com Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Signed-off-by: Peter Ujfalusi peter.ujfalusi@linux.intel.com Link: https://msgid.link/r/20240213123834.4827-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown broonie@kernel.org

diff --git a/sound/soc/sof/ipc3.c b/sound/soc/sof/ipc3.c index fb40378ad084..c03dd513fbff 100644 --- a/sound/soc/sof/ipc3.c +++ b/sound/soc/sof/ipc3.c @@ -1067,7 +1067,7 @@ static void sof_ipc3_rx_msg(struct snd_sof_dev *sdev) return; }

- if (hdr.size < sizeof(hdr)) { + if (hdr.size < sizeof(hdr) || hdr.size > SOF_IPC_MSG_MAX_SIZE) { dev_err(sdev->dev, "The received message size is invalid\n"); return; }