From: Jarkko Nikula Date: Thu, 24 Apr 2014 07:34:36 +0000 (+0300) Subject: ASoC: Intel: Cancel hsw_notification_work before freeing the stream X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=de30a2ccb20d9baf5dac8a9c8ba8f0d9d5f4361e;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git ASoC: Intel: Cancel hsw_notification_work before freeing the stream 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 Reported-by: Wenkai Du Signed-off-by: Jarkko Nikula Signed-off-by: Mark Brown --- 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);