File ffmpeg-CVE-2020-22043.patch of Package ffmpeg.21292

diff --unified --recursive --text --new-file --color ffmpeg-3.4.2.old/libavformat/mpegenc.c ffmpeg-3.4.2.new/libavformat/mpegenc.c
--- ffmpeg-3.4.2.old/libavformat/mpegenc.c	2021-06-02 15:52:46.095508824 +0800
+++ ffmpeg-3.4.2.new/libavformat/mpegenc.c	2021-06-03 10:42:45.880563557 +0800
@@ -315,7 +315,7 @@
         if (ctx->packet_size < 20 || ctx->packet_size > (1 << 23) + 10) {
             av_log(ctx, AV_LOG_ERROR, "Invalid packet size %d\n",
                    ctx->packet_size);
-            goto fail;
+            return AVERROR(EINVAL);
         }
         s->packet_size = ctx->packet_size;
     } else
@@ -343,7 +343,7 @@
         st     = ctx->streams[i];
         stream = av_mallocz(sizeof(StreamInfo));
         if (!stream)
-            goto fail;
+            return AVERROR(ENOMEM);
         st->priv_data = stream;
 
         avpriv_set_pts_info(st, 64, 1, 90000);
@@ -369,14 +369,28 @@
                     if (lpcm_freq_tab[j] == st->codecpar->sample_rate)
                         break;
                 }
-                if (j == 4)
-                    goto fail;
-                if (st->codecpar->channels > 8)
-                    return -1;
+                if (j == 4) {
+                    int sr;
+                    av_log(ctx, AV_LOG_ERROR, "Invalid sampling rate for PCM stream.\n");
+                    av_log(ctx, AV_LOG_INFO, "Allowed sampling rates:");
+                    for (sr = 0; sr < 4; sr++)
+                         av_log(ctx, AV_LOG_INFO, " %d", lpcm_freq_tab[sr]);
+                    av_log(ctx, AV_LOG_INFO, "\n");
+                    return AVERROR(EINVAL);
+                }
+                if (st->codecpar->channels > 8) {
+                    av_log(ctx, AV_LOG_ERROR, "At most 8 channels allowed for LPCM streams.\n");
+                    return AVERROR(EINVAL);
+                }
                 stream->lpcm_header[0] = 0x0c;
                 stream->lpcm_header[1] = (st->codecpar->channels - 1) | (j << 4);
                 stream->lpcm_header[2] = 0x80;
                 stream->lpcm_align     = st->codecpar->channels * 2;
+            } else if (st->codecpar->codec_id != AV_CODEC_ID_MP1 &&
+                       st->codecpar->codec_id != AV_CODEC_ID_MP2 &&
+                       st->codecpar->codec_id != AV_CODEC_ID_MP3) {
+                av_log(ctx, AV_LOG_ERROR, "Unsupported audio codec. Must be one of mp1, mp2, mp3, pcm_s16be, ac3 or dts.\n");
+                return AVERROR(EINVAL);
             } else {
                 stream->id = mpa_id++;
             }
@@ -420,7 +434,7 @@
         }
         stream->fifo = av_fifo_alloc(16);
         if (!stream->fifo)
-            goto fail;
+            return AVERROR(ENOMEM);
     }
     bitrate       = 0;
     audio_bitrate = 0;
@@ -520,11 +534,6 @@
     s->system_header_size = get_system_header_size(ctx);
     s->last_scr           = AV_NOPTS_VALUE;
     return 0;
-
-fail:
-    for (i = 0; i < ctx->nb_streams; i++)
-        av_freep(&ctx->streams[i]->priv_data);
-    return AVERROR(ENOMEM);
 }
 
 static inline void put_timestamp(AVIOContext *pb, int id, int64_t timestamp)
@@ -1202,11 +1211,18 @@
         stream = ctx->streams[i]->priv_data;
 
         av_assert0(av_fifo_size(stream->fifo) == 0);
-        av_fifo_freep(&stream->fifo);
     }
     return 0;
 }
 
+static void mpeg_mux_deinit(AVFormatContext *ctx)
+{
+    for (int i = 0; i < ctx->nb_streams; i++) {
+        StreamInfo *stream = ctx->streams[i]->priv_data;
+        av_fifo_freep(&stream->fifo);
+    }
+}
+
 #define OFFSET(x) offsetof(MpegMuxContext, x)
 #define E AV_OPT_FLAG_ENCODING_PARAM
 static const AVOption options[] = {
@@ -1236,6 +1252,7 @@
     .write_header      = mpeg_mux_init,
     .write_packet      = mpeg_mux_write_packet,
     .write_trailer     = mpeg_mux_end,
+    .deinit            = mpeg_mux_deinit,
     .priv_class        = &mpeg_class,
 };
 #endif
@@ -1252,6 +1269,7 @@
     .write_header      = mpeg_mux_init,
     .write_packet      = mpeg_mux_write_packet,
     .write_trailer     = mpeg_mux_end,
+    .deinit            = mpeg_mux_deinit,
     .priv_class        = &vcd_class,
 };
 #endif
@@ -1269,6 +1287,7 @@
     .write_header      = mpeg_mux_init,
     .write_packet      = mpeg_mux_write_packet,
     .write_trailer     = mpeg_mux_end,
+    .deinit            = mpeg_mux_deinit,
     .priv_class        = &vob_class,
 };
 #endif
@@ -1287,6 +1306,7 @@
     .write_header      = mpeg_mux_init,
     .write_packet      = mpeg_mux_write_packet,
     .write_trailer     = mpeg_mux_end,
+    .deinit            = mpeg_mux_deinit,
     .priv_class        = &svcd_class,
 };
 #endif
@@ -1305,6 +1325,7 @@
     .write_header      = mpeg_mux_init,
     .write_packet      = mpeg_mux_write_packet,
     .write_trailer     = mpeg_mux_end,
+    .deinit            = mpeg_mux_deinit,
     .priv_class        = &dvd_class,
 };
 #endif