shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-03 17:51:57 +09:00
Code Issues Packages Projects Releases Wiki Activity

ASoC: dapm: delete dapm_kcontrol_data paths list before freeing it

Browse Source 
commit ff2faf1289 upstream.

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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Srinivas Kandagatla
2018-06-04 12:13:26 +01:00
committed by Greg Kroah-Hartman
parent 4e0ce7053a
commit 040fecfd71
1 changed files with 2 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
sound/soc/soc-dapm.c
View File

@@ -430,6 +430,8 @@ 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);
}