[PATCH v2] ASoC: SOF: ipc4-topology: Fix pin format leak in process widget setup

[Baoli Zhang]

sof_ipc4_widget_setup_comp_process() allocates the input and output pin
format arrays via sof_ipc4_get_audio_fmt(). When the following
sof_ipc4_widget_setup_msg() fails, e.g. because the firmware does not
provide a module matching the widget UUID, the error path jumps to the
'err' label, which frees the process struct and clears swidget->private
but skips sof_ipc4_free_audio_fmt(). The arrays are then unreachable and
are reported by kmemleak:

    sof_ipc4_get_audio_fmt+0xc9/0x420 [snd_sof]
    sof_ipc4_widget_setup_comp_process+0x8e/0x200 [snd_sof]
    snd_sof_load_topology+0x71a/0x840 [snd_sof]
    sof_pcm_probe+0x77/0x120 [snd_sof]
    snd_soc_component_probe+0x21/0x60 [snd_soc_core]
    ...

Jump to 'free_available_fmt' instead, as the other process widget error
paths after sof_ipc4_get_audio_fmt() already do.

The other IPC4 widget setup functions (pga, mixer, src, asrc) free the
audio formats in their common error label and are not affected.

Fixes: f9efae954905 ("ASoC: SOF: ipc4-topology: Add support for base config extension")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Baoli Zhang <baoli.zhang@xxxxxxxxxxxxxxx>
---
Changes in v2:
- Drop the Assisted-by tag.
- v1: https://lore.kernel.org/linux-sound/20261103021710.3647599-1-baoli.zhang@xxxxxxxxxxxxxxx/

 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 8b13c97b34804..de03dc58021a1 100644
--- a/sound/soc/sof/ipc4-topology.c
+++ b/sound/soc/sof/ipc4-topology.c
@@ -1313,7 +1313,7 @@ static int sof_ipc4_widget_setup_comp_process(struct snd_sof_widget *swidget)
 
 	ret = sof_ipc4_widget_setup_msg(swidget, &process->msg);
 	if (ret)
-		goto err;
+		goto free_available_fmt;
 
 	/* parse process init module payload config type from module info */
 	fw_module = swidget->module_info;

base-commit: 3ecd14f81434da3b5ff5c44d243715f96d52303d
-- 
2.43.0