[PATCH] ASoC: SOF: Intel: hda: Place check before dereference

[PATCH] ASoC: SOF: Intel: hda: Place check before dereference

[Ethan Tidmore]

The struct hext_stream is dereferenced before it is checked for NULL.
Although it can never be NULL due to a check prior to
hda_dsp_iccmax_stream_hw_params() being called, this change clears any
confusion regarding hext_stream possibly being NULL.

Check hext_stream for NULL and then assign its members.

Detected by Smatch:
sound/soc/sof/intel/hda-stream.c:488 hda_dsp_iccmax_stream_hw_params() warn:
variable dereferenced before check 'hext_stream' (see line 486)

Fixes: aca961f196e5d ("ASoC: SOF: Intel: hda: Add helper function to program ICCMAX stream")
Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
---
 sound/soc/sof/intel/hda-stream.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c
index 1c04b5d9c0d8..5c1f3b427cdb 100644
--- a/sound/soc/sof/intel/hda-stream.c
+++ b/sound/soc/sof/intel/hda-stream.c
@@ -480,16 +480,20 @@ int hda_dsp_iccmax_stream_hw_params(struct snd_sof_dev *sdev, struct hdac_ext_st
 				    struct snd_dma_buffer *dmab,
 				    struct snd_pcm_hw_params *params)
 {
-	struct hdac_stream *hstream = &hext_stream->hstream;
-	int sd_offset = SOF_STREAM_SD_OFFSET(hstream);
+	struct hdac_stream *hstream;
+	int sd_offset;
 	int ret;
-	u32 mask = 0x1 << hstream->index;
+	u32 mask;
 
 	if (!hext_stream) {
 		dev_err(sdev->dev, "error: no stream available\n");
 		return -ENODEV;
 	}
 
+	hstream = &hext_stream->hstream;
+	sd_offset = SOF_STREAM_SD_OFFSET(hstream);
+	mask = 0x1 << hstream->index;
+
 	if (!dmab) {
 		dev_err(sdev->dev, "error: no dma buffer allocated!\n");
 		return -ENODEV;
-- 
2.53.0

Re: [PATCH] ASoC: SOF: Intel: hda: Place check before dereference

[Mark Brown]

On Tue, 24 Mar 2026 12:38:30 -0500, Ethan Tidmore wrote:
> ASoC: SOF: Intel: hda: Place check before dereference

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-7.1

Thanks!

[1/1] ASoC: SOF: Intel: hda: Place check before dereference
      https://git.kernel.org/broonie/sound/c/6cbc8360f51a

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