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authorSrinivas Kandagatla <srinivas.kandagatla@linaro.org>2018-06-04 14:13:26 +0300
committerMark Brown <broonie@kernel.org>2018-06-04 16:56:22 +0300
commitff2faf1289c1f81b5b26b9451dd1c2006aac8db8 (patch)
tree8acfe28455382fb48ccf996b5ae96bbdd3cc8ff3
parent0c24fdc00244cc08309e397e3783f2943221dc53 (diff)
downloadlinux-ff2faf1289c1f81b5b26b9451dd1c2006aac8db8.tar.xz
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
-rw-r--r--sound/soc/soc-dapm.c2
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);
}