nutdec: Check memory allocations

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

libavformat/nutdec.c

@@ -231,6 +231,8 @@ static int decode_main_header(NUTContext *nut)
 
     GET_V(nut->time_base_count, tmp > 0 && tmp < INT_MAX / sizeof(AVRational));
     nut->time_base = av_malloc(nut->time_base_count * sizeof(AVRational));
+    if (!nut->time_base)
+        return AVERROR(ENOMEM);
 
     for (i = 0; i < nut->time_base_count; i++) {
         GET_V(nut->time_base[i].num, tmp > 0 && tmp < (1ULL << 31));
@@ -332,6 +334,8 @@ static int decode_main_header(NUTContext *nut)
     }
 
     nut->stream = av_mallocz(sizeof(StreamContext) * stream_count);
+    if (!nut->stream)
+        return AVERROR(ENOMEM);
     for (i = 0; i < stream_count; i++)
         avformat_new_stream(s, NULL);
 
@@ -405,6 +409,8 @@ static int decode_stream_header(NUTContext *nut)
     if (st->codec->extradata_size) {
         st->codec->extradata = av_mallocz(st->codec->extradata_size +
                                           FF_INPUT_BUFFER_PADDING_SIZE);
+        if (!st->codec->extradata)
+            return AVERROR(ENOMEM);
         avio_read(bc, st->codec->extradata, st->codec->extradata_size);
     }
 
@@ -609,6 +615,8 @@ static int find_and_decode_index(NUTContext *nut)
     GET_V(syncpoint_count, tmp < INT_MAX / 8 && tmp > 0);
     syncpoints   = av_malloc(sizeof(int64_t) *  syncpoint_count);
     has_keyframe = av_malloc(sizeof(int8_t)  * (syncpoint_count + 1));
+    if (!syncpoints || !has_keyframe)
+        return AVERROR(ENOMEM);
     for (i = 0; i < syncpoint_count; i++) {
         syncpoints[i] = ffio_read_varlen(bc);
         if (syncpoints[i] <= 0)