[FFmpeg-devel] [PATCH 06/26] avformat/mov: Fix memleaks upon read_header failure

[Andreas Rheinhardt]

By default, a demuxer's read_close function is not called automatically
if an error happens when reading the header; instead it is up to the
demuxer to clean up after itself in this case. The mov demuxer did this
by calling its read_close function when it encountered some errors when
reading the header. Yet for other errors (mostly adding side-data to
streams) this has been forgotten, so that all the internal structures
of the demuxer leak.

This commit fixes this by making sure mov_read_close is called when
necessary.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
---
 libavformat/mov.c | 33 +++++++++++++++++----------------
 1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 2fc27d2aec..47bbb3697d 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -7580,14 +7580,13 @@ static int mov_read_header(AVFormatContext *s)
             avio_seek(pb, 0, SEEK_SET);
         if ((err = mov_read_default(mov, pb, atom)) < 0) {
             av_log(s, AV_LOG_ERROR, "error reading header\n");
-            mov_read_close(s);
-            return err;
+            goto fail;
         }
     } while ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mov->found_moov && !mov->moov_retry++);
     if (!mov->found_moov) {
         av_log(s, AV_LOG_ERROR, "moov atom not found\n");
-        mov_read_close(s);
-        return AVERROR_INVALIDDATA;
+        err = AVERROR_INVALIDDATA;
+        goto fail;
     }
     av_log(mov->fc, AV_LOG_TRACE, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
 
@@ -7640,7 +7639,7 @@ static int mov_read_header(AVFormatContext *s)
             }
             if (st->codecpar->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
                 if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
-                    return err;
+                    goto fail;
             }
         }
         if (mov->handbrake_version &&
@@ -7660,8 +7659,8 @@ static int mov_read_header(AVFormatContext *s)
                 if (sc->data_size > INT64_MAX / sc->time_scale / 8) {
                     av_log(s, AV_LOG_ERROR, "Overflow during bit rate calculation %"PRId64" * 8 * %d\n",
                            sc->data_size, sc->time_scale);
-                    mov_read_close(s);
-                    return AVERROR_INVALIDDATA;
+                    err = AVERROR_INVALIDDATA;
+                    goto fail;
                 }
                 st->codecpar->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
             }
@@ -7676,8 +7675,8 @@ static int mov_read_header(AVFormatContext *s)
                 if (sc->data_size > INT64_MAX / sc->time_scale / 8) {
                     av_log(s, AV_LOG_ERROR, "Overflow during bit rate calculation %"PRId64" * 8 * %d\n",
                            sc->data_size, sc->time_scale);
-                    mov_read_close(s);
-                    return AVERROR_INVALIDDATA;
+                    err = AVERROR_INVALIDDATA;
+                    goto fail;
                 }
                 st->codecpar->bit_rate = sc->data_size * 8 * sc->time_scale /
                     sc->duration_for_fps;
@@ -7701,8 +7700,7 @@ static int mov_read_header(AVFormatContext *s)
         case AVMEDIA_TYPE_AUDIO:
             err = ff_replaygain_export(st, s->metadata);
             if (err < 0) {
-                mov_read_close(s);
-                return err;
+                goto fail;
             }
             break;
         case AVMEDIA_TYPE_VIDEO:
@@ -7710,7 +7708,7 @@ static int mov_read_header(AVFormatContext *s)
                 err = av_stream_add_side_data(st, AV_PKT_DATA_DISPLAYMATRIX, (uint8_t*)sc->display_matrix,
                                               sizeof(int32_t) * 9);
                 if (err < 0)
-                    return err;
+                    goto fail;
 
                 sc->display_matrix = NULL;
             }
@@ -7719,7 +7717,7 @@ static int mov_read_header(AVFormatContext *s)
                                               (uint8_t *)sc->stereo3d,
                                               sizeof(*sc->stereo3d));
                 if (err < 0)
-                    return err;
+                    goto fail;
 
                 sc->stereo3d = NULL;
             }
@@ -7728,7 +7726,7 @@ static int mov_read_header(AVFormatContext *s)
                                               (uint8_t *)sc->spherical,
                                               sc->spherical_size);
                 if (err < 0)
-                    return err;
+                    goto fail;
 
                 sc->spherical = NULL;
             }
@@ -7737,7 +7735,7 @@ static int mov_read_header(AVFormatContext *s)
                                               (uint8_t *)sc->mastering,
                                               sizeof(*sc->mastering));
                 if (err < 0)
-                    return err;
+                    goto fail;
 
                 sc->mastering = NULL;
             }
@@ -7746,7 +7744,7 @@ static int mov_read_header(AVFormatContext *s)
                                               (uint8_t *)sc->coll,
                                               sc->coll_size);
                 if (err < 0)
-                    return err;
+                    goto fail;
 
                 sc->coll = NULL;
             }
@@ -7760,6 +7758,9 @@ static int mov_read_header(AVFormatContext *s)
             mov->frag_index.item[i].headers_read = 1;
 
     return 0;
+fail:
+    mov_read_close(s);
+    return err;
 }
 
 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
-- 
2.20.1