Since - snd_pcm_detach_substream sets runtime to null without stream lock and - snd_pcm_period_elapsed checks the nullity of the runtime outside of stream lock. This will trigger null memory access in snd_pcm_running() call in snd_pcm_period_elapsed. paulhsia (2): ALSA: pcm: Fix stream lock usage in snd_pcm_period_elapsed() ALSA: pcm: Use stream lock in snd_pcm_detach_substream() sound/core/pcm.c | 8 +++++++- sound/core/pcm_lib.c | 8 ++++++-- 2 files changed, 13 insertions(+), 3 deletions(-) -- 2.24.0.rc1.363.gb1bccd3e3d-goog _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
