Messages in this thread Patch in this message | | | Subject | Re: [PATCH] ASoC: intel: Fix memleak in sst_media_open | From | Pierre-Louis Bossart <> | Date | Mon, 10 Aug 2020 09:34:43 -0500 |
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On 8/9/20 3:56 AM, Dinghao Liu wrote: > When power_up_sst() fails, stream needs to be freed > just like when try_module_get() fails. However, current > code is returning directly and ends up leaking memory. > > Fixes: 0121327c1a68b ("ASoC: Intel: mfld-pcm: add control for powering up/down dsp") > Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn> > --- > sound/soc/intel/atom/sst-mfld-platform-pcm.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/sound/soc/intel/atom/sst-mfld-platform-pcm.c b/sound/soc/intel/atom/sst-mfld-platform-pcm.c > index 49b9f18472bc..79fedf9e3da1 100644 > --- a/sound/soc/intel/atom/sst-mfld-platform-pcm.c > +++ b/sound/soc/intel/atom/sst-mfld-platform-pcm.c > @@ -330,8 +330,10 @@ static int sst_media_open(struct snd_pcm_substream *substream, > runtime->private_data = stream; > > ret_val = power_up_sst(stream); > - if (ret_val < 0) > + if (ret_val < 0) { > + kfree(stream); > return ret_val; > + } > > /* Make sure, that the period size is always even */ > snd_pcm_hw_constraint_step(substream->runtime, 0, >
Alternate suggestion to fix this, it's not great when we mix gotos and returns.
diff --git a/sound/soc/intel/atom/sst-mfld-platform-pcm.c b/sound/soc/intel/atom/sst-mfld-platform-pcm.c index 49b9f18472bc..b1cac7abdc0a 100644 --- a/sound/soc/intel/atom/sst-mfld-platform-pcm.c +++ b/sound/soc/intel/atom/sst-mfld-platform-pcm.c @@ -331,7 +331,7 @@ static int sst_media_open(struct snd_pcm_substream *substream,
ret_val = power_up_sst(stream); if (ret_val < 0) - return ret_val; + goto out_power_up;
/* Make sure, that the period size is always even */ snd_pcm_hw_constraint_step(substream->runtime, 0, @@ -340,8 +340,9 @@ static int sst_media_open(struct snd_pcm_substream *substream, return snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); out_ops: - kfree(stream); mutex_unlock(&sst_lock); +out_power_up: + kfree(stream); return ret_val; }
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