diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c
index 0f1560a615..521b9d0e8c 100644
--- a/libavformat/rmdec.c
+++ b/libavformat/rmdec.c
@@ -1290,8 +1290,11 @@ static int ivr_read_header(AVFormatContext *s)
                 int j;
 
                 av_log(s, AV_LOG_DEBUG, "%s = '0x", key);
-                for (j = 0; j < len; j++)
+                for (j = 0; j < len; j++) {
+                    if (avio_feof(pb))
+                        return AVERROR_INVALIDDATA;
                     av_log(s, AV_LOG_DEBUG, "%X", avio_r8(pb));
+                }
                 av_log(s, AV_LOG_DEBUG, "'\n");
             } else if (len == 4 && type == 3 && !strncmp(key, "Duration", tlen)) {
                 st->duration = avio_rb32(pb);