6.6-stable review patch. If anyone has any objections, please let me know.
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From: Peter Ujfalusi peter.ujfalusi@linux.intel.com
[ Upstream commit 2d91cb261cac6d885954b8f5da28b5c176c18131 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/soc-core.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 7eea70eea68b..dc95b6f41555 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -1025,6 +1025,9 @@ static int soc_dai_link_sanity_check(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);
/*