ASoC: SOF: IPC3: fix message bounds on ipc ops

From: Curtis Malainey <[email protected]>

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.

---
 sound/soc/sof/ipc3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index fb40378ad084..c03dd513fbff 100644
@@ -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;
 	}

2.43.0

Applied to

https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: SOF: IPC3: fix message bounds on ipc ops

      commit: fcbe4873089c84da641df75cda9cac2e9addbb4b

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

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Thanks,
Mark