I suppose there is a possibility that hsw_notification_work() may run after sst_hsw_stream_free() which can lead to a kernel crash since struct sst_hsw_stream is freed at that point and stream = container_of(work, struct sst_hsw_stream, notify_work) is not valid when hsw_notification_work() is run.

Reported-by: Derek Basehore dbasehore@chromium.org Reported-by: Wenkai Du wenkai.du@intel.com Signed-off-by: Jarkko Nikula jarkko.nikula@linux.intel.com --- Untested, I don't have at the moment Haswell to test this and Liam hasn't seen this patch yet so ack/tested-by from him might be good to have :-) --- sound/soc/intel/sst-haswell-ipc.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/sound/soc/intel/sst-haswell-ipc.c b/sound/soc/intel/sst-haswell-ipc.c index 6c0b4f247a86..5bcf5963a0ba 100644 --- a/sound/soc/intel/sst-haswell-ipc.c +++ b/sound/soc/intel/sst-haswell-ipc.c @@ -1207,6 +1207,7 @@ int sst_hsw_stream_free(struct sst_hsw *hsw, struct sst_hsw_stream *stream) trace_hsw_stream_free_req(stream, &stream->free_req);

out: + cancel_work_sync(&stream->notify_work); spin_lock_irqsave(&sst->spinlock, flags); list_del(&stream->node); kfree(stream);