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| author | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> | 2018-06-04 13:13:26 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-06-04 15:56:22 +0200 |
| commit | ff2faf1289c1f81b5b26b9451dd1c2006aac8db8 (patch) | |
| tree | 8acfe28455382fb48ccf996b5ae96bbdd3cc8ff3 /sound/soc | |
| parent | ASoC: topology: Move skl-tplg-interface.h to uapi (diff) | |
| download | linux-ff2faf1289c1f81b5b26b9451dd1c2006aac8db8.tar.xz linux-ff2faf1289c1f81b5b26b9451dd1c2006aac8db8.zip | |
ASoC: dapm: delete dapm_kcontrol_data paths list before freeing it
dapm_kcontrol_data is freed as part of dapm_kcontrol_free(), leaving the
paths pointer dangling in the list.
This leads to system crash when we try to unload and reload sound card.
I hit this bug during ADSP crash/reboot test case on Dragon board DB410c.
Without this patch, on SLAB Poisoning enabled build, kernel crashes with
"BUG kmalloc-128 (Tainted: G W ): Poison overwritten"
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/soc-dapm.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 1e9a36389667..36a39ba30226 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -433,6 +433,8 @@ err_data: static void dapm_kcontrol_free(struct snd_kcontrol *kctl) { struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl); + + list_del(&data->paths); kfree(data->wlist); kfree(data); } |