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| author |   Kai Vehmanen <kai.vehmanen@linux.intel.com> | 2019-12-17 18:05:16 -0600 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2019-12-18 19:49:22 +0000 |
| commit | b06e46427f987bf83dcb6a69516b57276eb8ec0c (patch) | |
| tree | d1ce39c279d0a353b9d40f447553012b4cdae5e0 /sound | |
| parent | ASoC: wm8962: fix lambda value (diff) | |
| download | linux-dev-b06e46427f987bf83dcb6a69516b57276eb8ec0c.tar.xz linux-dev-b06e46427f987bf83dcb6a69516b57276eb8ec0c.zip | |
ASoC: SOF: fix fault at driver unload after failed probe
If sof_machine_check() fails during driver probe, the IPC
state is not initialized and this will lead to a NULL
dereference at driver unload. Example log is as follows:
[ 1535.980630] sof-audio-pci 0000:00:1f.3: error: no matching ASoC machine driver found - aborting probe
[ 1535.980631] sof-audio-pci 0000:00:1f.3: error: failed to get machine info -19
[ 1535.980632] sof-audio-pci 0000:00:1f.3: error: sof_probe_work failed err: -19
[ 1550.798373] BUG: kernel NULL pointer dereference, address: 0000000000000008
...
[ 1550.798393] Call Trace:
[ 1550.798397] snd_sof_ipc_free+0x15/0x30 [snd_sof]
[ 1550.798399] snd_sof_device_remove+0x29/0xa0 [snd_sof]
[ 1550.798400] sof_pci_remove+0x10/0x30 [snd_sof_pci]
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191218000518.5830-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/sof/ipc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/soc/sof/ipc.c b/sound/soc/sof/ipc.c index 5994e1073364..5fdfbaa8c4ed 100644 --- a/sound/soc/sof/ipc.c +++ b/sound/soc/sof/ipc.c @@ -826,6 +826,9 @@ void snd_sof_ipc_free(struct snd_sof_dev *sdev) { struct snd_sof_ipc *ipc = sdev->ipc; + if (!ipc) + return; + /* disable sending of ipc's */ mutex_lock(&ipc->tx_mutex); ipc->disable_ipc_tx = true; |