[FFmpeg-cvslog] avformat/mov: Fix memleaks for duplicate STCO/CO64/STSC atoms

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Wed Nov 26 18:16:15 2014 +0100| [1b5d11240692025f036e945bc37968735679320a] | committer: Michael Niedermayer

avformat/mov: Fix memleaks for duplicate STCO/CO64/STSC atoms

Also see [FFmpeg-devel] [PATCH] avformat/mov: strengthen some table allocations
which contains more fixes but is unfinished

Fixes: signal_sigabrt_7ffff6ac7bb9_3484_cov_1830000177_starfox2.mov
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1b5d11240692025f036e945bc37968735679320a
---

 libavformat/mov.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index d65e40f..a71e36d 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1275,6 +1275,10 @@ static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     if (entries >= UINT_MAX/sizeof(int64_t))
         return AVERROR_INVALIDDATA;
 
+    if (sc->chunk_offsets)
+        av_log(c->fc, AV_LOG_WARNING, "Duplicate STCO atom\n");
+    av_free(sc->chunk_offsets);
+    sc->chunk_count = 0;
     sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
     if (!sc->chunk_offsets)
         return AVERROR(ENOMEM);
@@ -1871,6 +1875,10 @@ static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         return 0;
     if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
         return AVERROR_INVALIDDATA;
+    if (sc->stsc_data)
+        av_log(c->fc, AV_LOG_WARNING, "Duplicate STSC atom\n");
+    av_free(sc->stsc_data);
+    sc->stsc_count = 0;
     sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
     if (!sc->stsc_data)
         return AVERROR(ENOMEM);