diff --git a/libavcodec/flicvideo.c b/libavcodec/flicvideo.c
index 9e35f48e4c..2f8cd33802 100644
--- a/libavcodec/flicvideo.c
+++ b/libavcodec/flicvideo.c
@@ -387,6 +387,11 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
                     if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
                         break;
                     byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
+                    if (!byte_run) {
+                        av_log(avctx, AV_LOG_ERROR, "Invalid byte run value.\n");
+                        return AVERROR_INVALIDDATA;
+                    }
+
                     if (byte_run > 0) {
                         palette_idx1 = bytestream2_get_byte(&g2);
                         CHECK_PIXEL_PTR(byte_run);
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 86ec95c1e5..137f79b331 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -835,7 +835,7 @@ static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 
     version = avio_r8(pb);
     if (version > 1) {
-        av_log_ask_for_sample(c, "unsupported version %d\n", version);
+        av_log_ask_for_sample(c->fc, "unsupported version %d\n", version);
         return AVERROR_PATCHWELCOME;
     }
     avio_rb24(pb); /* flags */