diff --git a/libavformat/mov.c b/libavformat/mov.c
index 7dffa34bd8..eb12edf377 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -3288,6 +3288,9 @@ static int mov_read_sdtp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     av_freep(&sc->sdtp_data);
     sc->sdtp_count = 0;
 
+    if (entries < 0 || entries > SIZE_MAX)
+        return AVERROR(ERANGE);
+
     sc->sdtp_data = av_malloc(entries);
     if (!sc->sdtp_data)
         return AVERROR(ENOMEM);