From: Curtis Malainey cujomalainey@chromium.org
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 --- sound/soc/sof/ipc3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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; }