diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index bcf95d3..e23e0e7 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -67,6 +67,8 @@
 	} else {
 		if (new_hw_ptr == ULONG_MAX) {	/* initialization */
 			snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime);
+			if (avail > runtime->buffer_size)
+				avail = runtime->buffer_size;
 			runtime->silence_filled = avail > 0 ? avail : 0;
 			runtime->silence_start = (runtime->status->hw_ptr +
 						  runtime->silence_filled) %