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ASoC: core: Check for rtd == NULL in snd_soc_remove_pcm_runtime()

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snd_soc_remove_pcm_runtime() might be called with rtd == NULL which will
leads to null pointer dereference.
This was reproduced with topology loading and marking a link as ignore
due to missing hardware component on the system.
On module removal the soc_tplg_remove_link() would call
snd_soc_remove_pcm_runtime() with rtd == NULL since the link was ignored,
no runtime was created.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://patch.msgid.link/20250619084222.559-3-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2025-06-19 11:42:20 +03:00 committed by Mark Brown
parent cbf4e0fac3
commit 2d91cb261c
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GPG Key ID: 24D68B725D5487D0
1 changed files with 3 additions and 0 deletions
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3
sound/soc/soc-core.c
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@ -1139,6 +1139,9 @@ static int snd_soc_compensate_channel_connection_map(struct snd_soc_card *card,
void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
struct snd_soc_pcm_runtime *rtd)
{
if (!rtd)
return;
lockdep_assert_held(&client_mutex);
/*