[FFmpeg-cvslog] avformat/mov: Fix integer overflow in FFABS

[Michael Niedermayer]

ffmpeg | branch: release/2.4 | Michael Niedermayer <michael at niedermayer.cc> | Thu Sep  3 09:20:23 2015 +0200| [79b16c6e5e2f29b48a562f3829800909b8d398d6] | committer: Michael Niedermayer

avformat/mov: Fix integer overflow in FFABS

Fixes: unknown_unknown_19e_414_cov_764838672_bellhamlam.mov

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 053e80f6eaf8d87521fe58ea96886b6ee0bbe59d)

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=79b16c6e5e2f29b48a562f3829800909b8d398d6
---

 libavformat/mov.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 3973081..6f46dbb 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -2083,7 +2083,7 @@ static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         av_dlog(c->fc, "count=%d, duration=%d\n",
                 count, duration);
 
-        if (FFABS(duration) > (1<<28) && i+2<entries) {
+        if (FFNABS(duration) < -(1<<28) && i+2<entries) {
             av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
             av_freep(&sc->ctts_data);
             sc->ctts_count = 0;