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authorRanjani Sridharan <ranjani.sridharan@linux.intel.com>2020-07-07 22:40:27 +0200
committerMark Brown <broonie@kernel.org>2020-07-08 16:02:02 +0200
commiteceb5437ed0d41be5d12af3add58b3be2d5719e5 (patch)
treef4e73597877eaf401e6bcfe7e43739751c9e5fc1 /sound/soc/sof
parentMAINTAINERS: Add Shengjiu to reviewer list of sound/soc/fsl (diff)
downloadlinux-eceb5437ed0d41be5d12af3add58b3be2d5719e5.tar.xz
linux-eceb5437ed0d41be5d12af3add58b3be2d5719e5.zip
ASoC: SOF: core: fix null-ptr-deref bug during device removal
The DSP should be notified for device removal only if the probe was successful. Fixes the following KASAN bug: BUG: KASAN: null-ptr-deref in sof_ipc_tx_message+0x80/0x160 [snd_sof] Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Link: https://lore.kernel.org/r/20200707204027.114169-1-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/sof')
-rw-r--r--sound/soc/sof/core.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/sound/soc/sof/core.c b/sound/soc/sof/core.c
index 339c4930b0c0..adc7c37145d6 100644
--- a/sound/soc/sof/core.c
+++ b/sound/soc/sof/core.c
@@ -345,15 +345,15 @@ int snd_sof_device_remove(struct device *dev)
struct snd_sof_pdata *pdata = sdev->pdata;
int ret;
- ret = snd_sof_dsp_power_down_notify(sdev);
- if (ret < 0)
- dev_warn(dev, "error: %d failed to prepare DSP for device removal",
- ret);
-
if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE))
cancel_work_sync(&sdev->probe_work);
if (sdev->fw_state > SOF_FW_BOOT_NOT_STARTED) {
+ ret = snd_sof_dsp_power_down_notify(sdev);
+ if (ret < 0)
+ dev_warn(dev, "error: %d failed to prepare DSP for device removal",
+ ret);
+
snd_sof_fw_unload(sdev);
snd_sof_ipc_free(sdev);
snd_sof_free_debug(sdev);