The patch

ASoC: SOF: Intel: Fix stream cleanup on hw free

has been applied to the asoc tree at

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

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

From 16dcefc23eefda57ee705dcffba67f1bd42c01bc Mon Sep 17 00:00:00 2001

From: Cezary Rojewski cezary.rojewski@intel.com Date: Thu, 12 Mar 2020 13:00:58 +0100 Subject: [PATCH] ASoC: SOF: Intel: Fix stream cleanup on hw free

Field "substream" gets assigned during stream setup in hda_dsp_pcm_hw_params() but it is never cleared afterwards during cleanup procedure. Now, any non-pcm operation e.g.: compress can mistakenly make use of that pointer as it's bypassing all "if (s->substream)" checks.

Nulling the pointer during hw_free operation ensures no wild pointers are left behind.

Fixes: cdae3b9a47aa ("ASoC: SOF: Intel: Add Intel specific HDA PCM operations") Signed-off-by: Cezary Rojewski cezary.rojewski@intel.com Acked-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Link: https://lore.kernel.org/r/20200312120058.15057-1-cezary.rojewski@intel.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/sof/intel/hda-stream.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c index c0ab9bb2a797..d2234f802788 100644 --- a/sound/soc/sof/intel/hda-stream.c +++ b/sound/soc/sof/intel/hda-stream.c @@ -547,6 +547,8 @@ int hda_dsp_stream_hw_free(struct snd_sof_dev *sdev, SOF_HDA_REG_PP_PPCTL, mask, 0); spin_unlock_irq(&bus->reg_lock);

+ stream->substream = NULL; + return 0; }