diff --git a/libavformat/pcm.c b/libavformat/pcm.c
index a774dbc372..bea3a1443d 100644
--- a/libavformat/pcm.c
+++ b/libavformat/pcm.c
@@ -74,7 +74,8 @@ int ff_pcm_read_seek(AVFormatContext *s,
                      int stream_index, int64_t timestamp, int flags)
 {
     AVStream *st;
-    int block_align, byte_rate;
+    int block_align;
+    int64_t byte_rate;
     int64_t pos, ret;
 
     st = s->streams[0];
@@ -82,9 +83,9 @@ int ff_pcm_read_seek(AVFormatContext *s,
     block_align = st->codecpar->block_align ? st->codecpar->block_align :
         (av_get_bits_per_sample(st->codecpar->codec_id) * st->codecpar->ch_layout.nb_channels) >> 3;
     byte_rate = st->codecpar->bit_rate ? st->codecpar->bit_rate >> 3 :
-        block_align * st->codecpar->sample_rate;
+        block_align * (int64_t)st->codecpar->sample_rate;
 
-    if (block_align <= 0 || byte_rate <= 0)
+    if (block_align <= 0 || byte_rate <= 0 || FFMAX(timestamp, st->time_base.num) > INT64_MAX / byte_rate)
         return -1;
     if (timestamp < 0) timestamp = 0;
 
@@ -93,6 +94,9 @@ int ff_pcm_read_seek(AVFormatContext *s,
                          st->time_base.num,
                          st->time_base.den * (int64_t)block_align,
                          (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
+
+    if (pos > (INT64_MAX - FFMAX(ffformatcontext(s)->data_offset, 0)) / block_align)
+        return -1;
     pos *= block_align;
 
     /* recompute exact position */