From d40a198e2b7821197c5c77b89d0130cc90f400f5 Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Thu, 26 Mar 2026 09:56:18 +0200 Subject: [PATCH] ASoC: SOF: ipc4-topology: Allow bytes controls without initial payload It is unexpected, but allowed to have no initial payload for a bytes control and the code is prepared to handle this case, but the size check missed this corner case. Update the check for minimal size to allow the initial size to be 0. Cc: stable@vger.kernel.org Fixes: a653820700b8 ("ASoC: SOF: ipc4-topology: Correct the allocation size for bytes controls") Signed-off-by: Peter Ujfalusi Reviewed-by: Bard Liao Reviewed-by: Liam Girdwood Reviewed-by: Seppo Ingalsuo Reviewed-by: Kai Vehmanen Link: https://patch.msgid.link/20260326075618.1603-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown --- sound/soc/sof/ipc4-topology.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/soc/sof/ipc4-topology.c b/sound/soc/sof/ipc4-topology.c index db077e9d5644..c12ffdcfe4e3 100644 --- a/sound/soc/sof/ipc4-topology.c +++ b/sound/soc/sof/ipc4-topology.c @@ -2950,7 +2950,7 @@ static int sof_ipc4_control_load_bytes(struct snd_sof_dev *sdev, struct snd_sof_ return -EINVAL; } - if (scontrol->priv_size < sizeof(struct sof_abi_hdr)) { + if (scontrol->priv_size && scontrol->priv_size < sizeof(struct sof_abi_hdr)) { dev_err(sdev->dev, "bytes control %s initial data size %zu is insufficient.\n", scontrol->name, scontrol->priv_size);