!13 合入ffmpeg开源软件漏洞处理

Merge pull request !13 from starfish/master

ffmpeg-y/fftools/ffmpeg.c

@@ -515,6 +515,7 @@ static void ffmpeg_cleanup(int ret)
         }
         av_freep(&fg->inputs);
         for (j = 0; j < fg->nb_outputs; j++) {
+            avfilter_inout_free(&fg->outputs[j]->out_tmp); // fix CVE-2020-22042
             av_freep(&fg->outputs[j]->name);
             av_freep(&fg->outputs[j]->formats);
             av_freep(&fg->outputs[j]->channel_layouts);
@@ -567,6 +568,7 @@ static void ffmpeg_cleanup(int ret)
         ost->audio_channels_mapped = 0;
 
         av_dict_free(&ost->sws_dict);
+        av_dict_free(&ost->swr_opts); // fix CVE-2020-22054
 
         avcodec_free_context(&ost->enc_ctx);
         avcodec_parameters_free(&ost->ref_par);

ffmpeg-y/libavcodec/ac3enc.c

@@ -2050,8 +2050,9 @@ av_cold int ff_ac3_encode_close(AVCodecContext *avctx)
         av_freep(&block->cpl_coord_exp);
         av_freep(&block->cpl_coord_mant);
     }
-
-    s->mdct_end(s);
+    // fix CVE-2020-22046
+    if (s->mdct_end)
+        s->mdct_end(s);
 
     return 0;
 }
@@ -2433,7 +2434,7 @@ av_cold int ff_ac3_encode_init(AVCodecContext *avctx)
 
     ret = validate_options(s);
     if (ret)
-        return ret;
+        goto init_fail; // fix CVE-2020-22046
 
     avctx->frame_size = AC3_BLOCK_SIZE * s->num_blocks;
     avctx->initial_padding = AC3_BLOCK_SIZE;

ffmpeg-y/libavcodec/v4l2_m2m.c

@@ -312,6 +312,7 @@ static void v4l2_m2m_destroy_context(void *opaque, uint8_t *context)
     sem_destroy(&s->refsync);
 
     close(s->fd);
+    av_packet_unref(&s->buf_pkt); // fix CVE-2020-22038
 
     av_free(s);
 }
@@ -321,14 +322,19 @@ int ff_v4l2_m2m_codec_end(AVCodecContext *avctx)
     V4L2m2mPriv *priv = avctx->priv_data;
     V4L2m2mContext* s = priv->context;
     int ret;
+    // fix CVE-2020-22038
+    if (!s)
+        return 0;
 
-    ret = ff_v4l2_context_set_status(&s->output, VIDIOC_STREAMOFF);
-    if (ret)
+    if (s->fd >= 0) {
+        ret = ff_v4l2_context_set_status(&s->output, VIDIOC_STREAMOFF);
+        if (ret)
             av_log(avctx, AV_LOG_ERROR, "VIDIOC_STREAMOFF %s\n", s->output.name);
 
-    ret = ff_v4l2_context_set_status(&s->capture, VIDIOC_STREAMOFF);
-    if (ret)
-        av_log(avctx, AV_LOG_ERROR, "VIDIOC_STREAMOFF %s\n", s->capture.name);
+        ret = ff_v4l2_context_set_status(&s->capture, VIDIOC_STREAMOFF);
+        if (ret)
+            av_log(avctx, AV_LOG_ERROR, "VIDIOC_STREAMOFF %s\n", s->capture.name);
+    }
 
     ff_v4l2_context_release(&s->output);
 

ffmpeg-y/libavcodec/v4l2_m2m_dec.c

@@ -187,12 +187,8 @@ static av_cold int v4l2_decode_init(AVCodecContext *avctx)
     capture->av_pix_fmt = avctx->pix_fmt;
 
     ret = ff_v4l2_m2m_codec_init(avctx);
-    if (ret) {
-        V4L2m2mPriv *priv = avctx->priv_data;
+    if (ret) { // fix CVE-2020-22038
         av_log(avctx, AV_LOG_ERROR, "can't configure decoder\n");
-        s->self_ref = NULL;
-        av_buffer_unref(&priv->context_ref);
-
         return ret;
     }
 
@@ -228,8 +224,8 @@ AVCodec ff_ ## NAME ## _v4l2m2m_decoder = { \
     .receive_frame  = v4l2_receive_frame,\
     .close          = ff_v4l2_m2m_codec_end,\
     .bsfs           = bsf_name, \
-    .capabilities   = AV_CODEC_CAP_HARDWARE | AV_CODEC_CAP_DELAY | \
-                      AV_CODEC_CAP_AVOID_PROBING, \
+    .capabilities   = AV_CODEC_CAP_HARDWARE | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AVOID_PROBING, \
+    .caps_internal  = FF_CODEC_CAP_SETS_PKT_DTS | FF_CODEC_CAP_INIT_CLEANUP, \
     .wrapper_name   = "v4l2m2m", \
 };
 

ffmpeg-y/libavcodec/v4l2_m2m_enc.c

@@ -342,6 +342,7 @@ AVCodec ff_ ## NAME ## _v4l2m2m_encoder = { \
     .receive_packet = v4l2_receive_packet,\
     .close          = ff_v4l2_m2m_codec_end,\
     .capabilities   = AV_CODEC_CAP_HARDWARE | AV_CODEC_CAP_DELAY, \
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP, \
     .wrapper_name   = "v4l2m2m", \
 };
 

ffmpeg-y/libavfilter/af_acrossover.c

@@ -314,6 +314,7 @@ static av_cold void uninit(AVFilterContext *ctx)
     int i;
 
     av_freep(&s->splits);
+    av_frame_free(&s->xover); // fix CVE-2020-22056
 
     for (i = 0; i < ctx->nb_outputs; i++)
         av_freep(&ctx->output_pads[i].name);

ffmpeg-y/libavfilter/af_tremolo.c

@@ -28,6 +28,7 @@ typedef struct TremoloContext {
     double freq;
     double depth;
     double *table;
+    int table_size;
     int index;
 } TremoloContext;
 
@@ -72,7 +73,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
         dst += channels;
         src += channels;
         s->index++;
-        if (s->index >= inlink->sample_rate / s->freq)
+        // fix CVE-2020-22026
+        if (s->index >= s->table_size)
             s->index = 0;
     }
 
@@ -124,12 +126,13 @@ static int config_input(AVFilterLink *inlink)
     TremoloContext *s = ctx->priv;
     const double offset = 1. - s->depth / 2.;
     int i;
-
-    s->table = av_malloc_array(inlink->sample_rate / s->freq, sizeof(*s->table));
+    // fix CVE-2020-22026
+    s->table_size = lrint(inlink->sample_rate / s->freq + 0.5);
+    s->table = av_malloc_array(s->table_size, sizeof(*s->table));
     if (!s->table)
         return AVERROR(ENOMEM);
 
-    for (i = 0; i < inlink->sample_rate / s->freq; i++) {
+    for (i = 0; i < s->table_size; i++) {
         double env = s->freq * i / inlink->sample_rate;
         env = sin(2 * M_PI * fmod(env + 0.25, 1.0));
         s->table[i] = env * (1 - fabs(offset)) + offset;

ffmpeg-y/libavfilter/f_reverse.c

@@ -57,6 +57,11 @@ static av_cold int init(AVFilterContext *ctx)
 static av_cold void uninit(AVFilterContext *ctx)
 {
     ReverseContext *s = ctx->priv;
+    // fix CVE-2020-22040
+    while (s->nb_frames > 0) {
+        av_frame_free(&s->frames[s->nb_frames - 1]);
+        s->nb_frames--;
+    }
 
     av_freep(&s->pts);
     av_freep(&s->frames);
@@ -103,6 +108,7 @@ static int request_frame(AVFilterLink *outlink)
         AVFrame *out = s->frames[s->nb_frames - 1];
         out->pts     = s->pts[s->flush_idx++];
         ret          = ff_filter_frame(outlink, out);
+        s->frames[s->nb_frames - 1] = NULL; // fix CVE-2020-22040
         s->nb_frames--;
     }
 
@@ -262,6 +268,7 @@ static int areverse_request_frame(AVFilterLink *outlink)
         else
             reverse_samples_packed(out);
         ret = ff_filter_frame(outlink, out);
+        s->frames[s->nb_frames - 1] = NULL; // fix CVE-2020-22040
         s->nb_frames--;
     }
 

ffmpeg-y/libavfilter/vf_avgblur.c

@@ -149,7 +149,7 @@ static int filter_vertically_##name(AVFilterContext *ctx, void *arg, int jobnr,
                                                                                               \
         src = s->buffer + x;                                                                  \
         ptr = buffer + x;                                                                     \
-        for (i = 0; i <= radius; i++) {                                                       \
+        for (i = 0; i + radius < height && i <= radius; i++) { /* fix CVE-2020-22028 */       \
             acc += src[(i + radius) * width];                                                 \
             count++;                                                                          \
             ptr[i * linesize] = acc / count;                                                  \

ffmpeg-y/libavfilter/vf_bm3d.c

@@ -706,8 +706,9 @@ static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
     const int plane = td->plane;
     const int width = s->planewidth[plane];
     const int height = s->planeheight[plane];
-    const int block_pos_bottom = height - s->block_size;
-    const int block_pos_right  = width - s->block_size;
+    // fix CVE-2020-22035
+    const int block_pos_bottom = FFMAX(0, height - s->block_size);
+    const int block_pos_right  = FFMAX(0, width - s->block_size);
     const int slice_start = (((height + block_step - 1) / block_step) * jobnr / nb_jobs) * block_step;
     const int slice_end = (jobnr == nb_jobs - 1) ? block_pos_bottom + block_step :
                           (((height + block_step - 1) / block_step) * (jobnr + 1) / nb_jobs) * block_step;
@@ -795,9 +796,9 @@ static int config_input(AVFilterLink *inlink)
 
     for (i = 0; i < s->nb_threads; i++) {
         SliceContext *sc = &s->slices[i];
-
-        sc->num = av_calloc(s->planewidth[0] * s->planeheight[0], sizeof(FFTSample));
-        sc->den = av_calloc(s->planewidth[0] * s->planeheight[0], sizeof(FFTSample));
+        // fix CVE-2020-22035
+        sc->num = av_calloc(FFALIGN(s->planewidth[0], s->block_size) * FFALIGN(s->planeheight[0], s->block_size), sizeof(FFTSample));
+        sc->den = av_calloc(FFALIGN(s->planewidth[0], s->block_size) * FFALIGN(s->planeheight[0], s->block_size), sizeof(FFTSample));
         if (!sc->num || !sc->den)
             return AVERROR(ENOMEM);
 

ffmpeg-y/libavfilter/vf_bwdif.c

@@ -342,9 +342,9 @@ static int config_props(AVFilterLink *link)
 
     if(yadif->mode&1)
         link->frame_rate = av_mul_q(link->src->inputs[0]->frame_rate, (AVRational){2,1});
-
-    if (link->w < 3 || link->h < 3) {
-        av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or lines is not supported\n");
+    // fix CVE-2020-22036
+    if (link->w < 3 || link->h < 4) {
+        av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or 4 lines is not supported\n");
         return AVERROR(EINVAL);
     }
 

ffmpeg-y/libavfilter/vf_colorspace.c

@@ -780,6 +780,7 @@ static int filter_frame(AVFilterLink *link, AVFrame *in)
     res = av_frame_copy_props(out, in);
     if (res < 0) {
         av_frame_free(&in);
+        av_frame_free(&out); // fix CVE-2020-22048
         return res;
     }
 
@@ -839,13 +840,19 @@ static int filter_frame(AVFilterLink *link, AVFrame *in)
             !s->dither_scratch_base[1][0] || !s->dither_scratch_base[1][1] ||
             !s->dither_scratch_base[2][0] || !s->dither_scratch_base[2][1]) {
             uninit(ctx);
+            av_frame_free(&in); // fix CVE-2020-22048
+            av_frame_free(&out);
             return AVERROR(ENOMEM);
         }
         s->rgb_sz = rgb_sz;
     }
     res = create_filtergraph(ctx, in, out);
-    if (res < 0)
+    // fix CVE-2020-22048
+    if (res < 0) {
+        av_frame_free(&in);
+        av_frame_free(&out);
         return res;
+    }
     s->rgb_stride = rgb_stride / sizeof(int16_t);
     td.in = in;
     td.out = out;
@@ -857,10 +864,14 @@ static int filter_frame(AVFilterLink *link, AVFrame *in)
     td.out_linesize[2] = out->linesize[2];
     td.in_ss_h = av_pix_fmt_desc_get(in->format)->log2_chroma_h;
     td.out_ss_h = av_pix_fmt_desc_get(out->format)->log2_chroma_h;
+    // fix CVE-2020-22048
     if (s->yuv2yuv_passthrough) {
         res = av_frame_copy(out, in);
-        if (res < 0)
+        if (res < 0) {
+            av_frame_free(&in);
+            av_frame_free(&out);
             return res;
+        }
     } else {
         ctx->internal->execute(ctx, convert, &td, NULL,
                                FFMIN((in->height + 1) >> 1, ff_filter_get_nb_threads(ctx)));

ffmpeg-y/libavfilter/vf_fieldmatch.c

@@ -938,7 +938,7 @@ static int config_input(AVFilterLink *inlink)
     fm->tpitchy  = FFALIGN(w,      16);
     fm->tpitchuv = FFALIGN(w >> 1, 16);
 
-    fm->tbuffer = av_malloc(h/2 * fm->tpitchy);
+    fm->tbuffer = av_calloc((h/2 + 4) * fm->tpitchy, sizeof(*fm->tbuffer)); // fix CVE-2020-22020
     fm->c_array = av_malloc((((w + fm->blockx/2)/fm->blockx)+1) *
                             (((h + fm->blocky/2)/fm->blocky)+1) *
                             4 * sizeof(*fm->c_array));

ffmpeg-y/libavfilter/vf_lagfun.c

@@ -137,7 +137,7 @@ static int lagfun_frame16(AVFilterContext *ctx, void *arg, int jobnr, int nb_job
         }
 
         for (int y = slice_start; y < slice_end; y++) {
-            for (int x = 0; x < s->linesize[p]; x++)
+            for (int x = 0; x < s->linesize[p] / 2; x++)
                 dst[x] = FFMAX(src[x], osrc[x] * decay);
 
             src += in->linesize[p] / 2;

ffmpeg-y/libavfilter/vf_random.c

@@ -108,6 +108,15 @@ static int request_frame(AVFilterLink *outlink)
     return ret;
 }
 
+// fix CVE-2020-22041
+static av_cold void uninit(AVFilterContext *ctx)
+{
+    RandomContext *s = ctx->priv;
+
+    for (int i = 0; i < s->nb_frames; i++)
+        av_frame_free(&s->frames[i]);
+}
+
 static const AVFilterPad random_inputs[] = {
     {
         .name         = "default",
@@ -132,6 +141,7 @@ AVFilter ff_vf_random = {
     .priv_size   = sizeof(RandomContext),
     .priv_class  = &random_class,
     .init        = init,
+    .uninit      = uninit, // fix CVE-2020-22041
     .inputs      = random_inputs,
     .outputs     = random_outputs,
 };

ffmpeg-y/libavfilter/vf_tile.c

@@ -262,6 +262,7 @@ static av_cold void uninit(AVFilterContext *ctx)
 {
     TileContext *tile = ctx->priv;
 
+    av_frame_free(&tile->out_ref); // fix CVE-2020-22051
     av_frame_free(&tile->prev_out_ref);
 }
 

ffmpeg-y/libavfilter/vf_vmafmotion.c

@@ -237,6 +237,9 @@ int ff_vmafmotion_init(VMAFMotionData *s,
     size_t data_sz;
     int i;
     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
+    // fix CVE-2020-22019
+    if (w < 3 || h < 3)
+        return AVERROR(EINVAL);
 
     s->width = w;
     s->height = h;

ffmpeg-y/libavfilter/vf_yadif.c

@@ -111,6 +111,7 @@ static void filter_line_c(void *dst1,
 }
 
 #define MAX_ALIGN 8
+// fix CVE-2020-22021
 static void filter_edges(void *dst1, void *prev1, void *cur1, void *next1,
                          int w, int prefs, int mrefs, int parity, int mode)
 {
@@ -123,20 +124,22 @@ static void filter_edges(void *dst1, void *prev1, void *cur1, void *next1,
     uint8_t *next2 = parity ? cur  : next;
 
     const int edge = MAX_ALIGN - 1;
+    int offset = FFMAX(w - edge, 3);
 
     /* Only edge pixels need to be processed here.  A constant value of false
      * for is_not_edge should let the compiler ignore the whole branch. */
-    FILTER(0, 3, 0)
+    FILTER(0, FFMIN(3, w), 0)
 
-    dst  = (uint8_t*)dst1  + w - edge;
-    prev = (uint8_t*)prev1 + w - edge;
-    cur  = (uint8_t*)cur1  + w - edge;
-    next = (uint8_t*)next1 + w - edge;
+    dst  = (uint8_t*)dst1  + offset;
+    prev = (uint8_t*)prev1 + offset;
+    cur  = (uint8_t*)cur1  + offset;
+    next = (uint8_t*)next1 + offset;
     prev2 = (uint8_t*)(parity ? prev : cur);
     next2 = (uint8_t*)(parity ? cur  : next);
 
-    FILTER(w - edge, w - 3, 1)
-    FILTER(w - 3, w, 0)
+    FILTER(offset, w - 3, 1)
+    offset = FFMAX(offset, w - 3);
+    FILTER(offset, w, 0)
 }
 
 

ffmpeg-y/libavformat/avienc.c

@@ -909,7 +909,7 @@ static int avi_write_trailer(AVFormatContext *s)
     AVIContext *avi = s->priv_data;
     AVIOContext *pb = s->pb;
     int res = 0;
-    int i, j, n, nb_frames;
+    int i, n, nb_frames;
     int64_t file_size;
 
     for (i = 0; i < s->nb_streams; i++) {
@@ -962,10 +962,6 @@ static int avi_write_trailer(AVFormatContext *s)
 
     for (i = 0; i < s->nb_streams; i++) {
         AVIStream *avist = s->streams[i]->priv_data;
-        for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
-            av_freep(&avist->indexes.cluster[j]);
-        av_freep(&avist->indexes.cluster);
-        avist->indexes.ents_allocated = avist->indexes.entry = 0;
         if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
             avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
             avio_wl32(pb, avist->max_size);
@@ -974,6 +970,23 @@ static int avi_write_trailer(AVFormatContext *s)
 
     return res;
 }
+// fix CVE-2020-22039
+static void avi_deinit(AVFormatContext *s)
+{
+    AVIContext *avi = s->priv_data;
+
+    av_packet_free(&avi->empty_packet);
+
+    for (int i = 0; i < s->nb_streams; i++) {
+        AVIStream *avist = s->streams[i]->priv_data;
+        if (!avist)
+            continue;
+        for (int j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
+            av_freep(&avist->indexes.cluster[j]);
+        av_freep(&avist->indexes.cluster);
+        avist->indexes.ents_allocated = avist->indexes.entry = 0;
+    }
+}
 
 #define OFFSET(x) offsetof(AVIContext, x)
 #define ENC AV_OPT_FLAG_ENCODING_PARAM
@@ -999,6 +1012,7 @@ AVOutputFormat ff_avi_muxer = {
     .audio_codec    = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
     .video_codec    = AV_CODEC_ID_MPEG4,
     .init           = avi_init,
+    .deinit         = avi_deinit, // fix CVE-2020-22039
     .write_header   = avi_write_header,
     .write_packet   = avi_write_packet,
     .write_trailer  = avi_write_trailer,

ffmpeg-y/libavformat/mpegenc.c

@@ -315,7 +315,7 @@ static av_cold int mpeg_mux_init(AVFormatContext *ctx)
         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); // fix CVE-2020-22043
         }
         s->packet_size = ctx->packet_size;
     } else
@@ -343,7 +343,7 @@ static av_cold int mpeg_mux_init(AVFormatContext *ctx)
         st     = ctx->streams[i];
         stream = av_mallocz(sizeof(StreamInfo));
         if (!stream)
-            goto fail;
+            return AVERROR(ENOMEM); // fix CVE-2020-22043
         st->priv_data = stream;
 
         avpriv_set_pts_info(st, 64, 1, 90000);
@@ -377,11 +377,11 @@ static av_cold int mpeg_mux_init(AVFormatContext *ctx)
                     for (sr = 0; sr < 4; sr++)
                          av_log(ctx, AV_LOG_INFO, " %d", lpcm_freq_tab[sr]);
                     av_log(ctx, AV_LOG_INFO, "\n");
-                    goto fail;
+                    return AVERROR(EINVAL); // fix CVE-2020-22043
                 }
                 if (st->codecpar->channels > 8) {
                     av_log(ctx, AV_LOG_ERROR, "At most 8 channels allowed for LPCM streams.\n");
-                    goto fail;
+                    return AVERROR(EINVAL); // fix CVE-2020-22043
                 }
                 stream->lpcm_header[0] = 0x0c;
                 stream->lpcm_header[1] = (st->codecpar->channels - 1) | (j << 4);
@@ -416,7 +416,7 @@ static av_cold int mpeg_mux_init(AVFormatContext *ctx)
                        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, 16-bit pcm_dvd, pcm_s16be, ac3 or dts.\n");
-                       goto fail;
+                       return AVERROR(EINVAL); // fix CVE-2020-22043
             } else {
                 stream->id = mpa_id++;
             }
@@ -460,7 +460,7 @@ static av_cold int mpeg_mux_init(AVFormatContext *ctx)
         }
         stream->fifo = av_fifo_alloc(16);
         if (!stream->fifo)
-            goto fail;
+            return AVERROR(ENOMEM); // fix CVE-2020-22043
     }
     bitrate       = 0;
     audio_bitrate = 0;
@@ -560,11 +560,6 @@ static av_cold int mpeg_mux_init(AVFormatContext *ctx)
     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)
@@ -1255,11 +1250,19 @@ static int mpeg_mux_end(AVFormatContext *ctx)
         stream = ctx->streams[i]->priv_data;
 
         av_assert0(av_fifo_size(stream->fifo) == 0);
-        av_fifo_freep(&stream->fifo);
     }
     return 0;
 }
 
+// fix CVE-2020-22043
+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[] = {
@@ -1289,6 +1292,7 @@ AVOutputFormat ff_mpeg1system_muxer = {
     .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
@@ -1305,6 +1309,7 @@ AVOutputFormat ff_mpeg1vcd_muxer = {
     .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
@@ -1322,6 +1327,7 @@ AVOutputFormat ff_mpeg2vob_muxer = {
     .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
@@ -1340,6 +1346,7 @@ AVOutputFormat ff_mpeg2svcd_muxer = {
     .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
@@ -1358,6 +1365,7 @@ AVOutputFormat ff_mpeg2dvd_muxer = {
     .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

ffmpeg-y/libavformat/nutenc.c

@@ -1171,8 +1171,13 @@ static int nut_write_trailer(AVFormatContext *s)
     while (nut->header_count < 3)
         write_headers(s, bc);
 
+    // fix CVE-2020-22044
+    if (!nut->sp_count)
+        return 0;
+
     ret = avio_open_dyn_buf(&dyn_bc);
-    if (ret >= 0 && nut->sp_count) {
+    // fix CVE-2020-22044
+    if (ret >= 0) {
         av_assert1(nut->write_index); // sp_count should be 0 if no index is going to be written
         write_index(nut, dyn_bc);
         put_packet(nut, bc, dyn_bc, 1, INDEX_STARTCODE);

ffmpeg-y/libavformat/wtvdec.c

@@ -993,8 +993,10 @@ static int read_header(AVFormatContext *s)
     }
 
     ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
-    if (ret < 0)
+    if (ret < 0) { // fix CVE-2020-22049
+        wtvfile_close(wtv->pb);
         return ret;
+    }
     avio_seek(wtv->pb, -32, SEEK_CUR);
 
     timeline_pos = avio_tell(s->pb); // save before opening another file