From: HariKrishna Sagala <hariconscious@gmail.com>

As per the C99 standard snprintf() returns the length of the data
that *would have been* written if there were enough space for it.
It's generally considered safer to use the scnprintf() variant.

Link: https://github.com/KSPP/linux/issues/105
Signed-off-by: HariKrishna Sagala <hariconscious@gmail.com>
---
This patch replaces snprintf() varaint with scnprintf() in
scenario to know the actual length of the data rather than *would
have been* written data of snprintf().
No functional changes intended.
Reference Links:
https://lwn.net/Articles/69419/
https://www.kernel.org/doc/html/latest/core-api/kernel-api.html#c.snprintf

Note:
*Compile & boot* tested.(CONFIG_SND_SOC_SOF_IPC4=y)

Thank you.

 sound/soc/sof/sof-client-probes-ipc4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/sof/sof-client-probes-ipc4.c b/sound/soc/sof/sof-client-probes-ipc4.c
index 758a56d271d7..d3fa37106b64 100644
--- a/sound/soc/sof/sof-client-probes-ipc4.c
+++ b/sound/soc/sof/sof-client-probes-ipc4.c
@@ -289,7 +289,7 @@ static int ipc4_probes_point_print(struct sof_client_dev *cdev, char *buf, size_
 			__func__, SOF_IPC4_MOD_ID_GET(desc->buffer_id),
 			SOF_IPC4_MOD_INSTANCE_GET(desc->buffer_id));
 
-	ret = snprintf(buf, size, "%#x,%#x,%#x\t%s %s buf idx %lu %s\n",
+	ret = scnprintf(buf, size, "%#x,%#x,%#x\t%s %s buf idx %lu %s\n",
 		       desc->buffer_id, desc->purpose, desc->stream_tag,
 		       swidget ? swidget->widget->name : "<unknown>",
 		       sof_probe_ipc4_type_string(SOF_IPC4_PROBE_TYPE_GET(desc->buffer_id)),

base-commit: 4427259cc7f7571a157fbc9b5011e1ef6fe0a4a8
-- 
2.43.0

On Tue, 11 Nov 2025 10:59:21 +0530, hariconscious@gmail.com wrote:
> As per the C99 standard snprintf() returns the length of the data
> that *would have been* written if there were enough space for it.
> It's generally considered safer to use the scnprintf() variant.
> 
> 

Applied to

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

Thanks!

[1/1] ASoC: SOF: sof-client-probes: Replace snprintf() with scnprintf()
      commit: e45979641a9a9dbb48fc77c5b36a5091a92e7227

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.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark