diff --git a/libavformat/hls.c b/libavformat/hls.c
index 332d10f2ee..73a5d22b39 100644
--- a/libavformat/hls.c
+++ b/libavformat/hls.c
@@ -750,10 +750,16 @@ static int parse_playlist(HLSContext *c, const char *url,
                                &info);
             new_rendition(c, &info, url);
         } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
+            int64_t t;
             ret = ensure_playlist(c, &pls, url);
             if (ret < 0)
                 goto fail;
-            pls->target_duration = strtoll(ptr, NULL, 10) * AV_TIME_BASE;
+            t = strtoll(ptr, NULL, 10);
+            if (t < 0 || t >= INT64_MAX / AV_TIME_BASE) {
+                ret = AVERROR_INVALIDDATA;
+                goto fail;
+            }
+            pls->target_duration = t * AV_TIME_BASE;
         } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
             ret = ensure_playlist(c, &pls, url);
             if (ret < 0)