avformat/mov: check atom nesting depth

Fixes call stack overflow
Fixes: case1_call_stack_overflow.mp4
Found-by: Michal Zalewski <lcamtuf@coredump.cx>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit caa7a3914f499f74b3ee346f26d598ebdc0ec210)

Conflicts:

	libavformat/isom.h

1 files changed, 1 insertions, 0 deletions

diff --git a/libavformat/isom.h b/libavformat/isom.h
index 4154baf827..c9004771bb 100644
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -162,6 +162,7 @@ typedef struct MOVContext {
     int use_absolute_path;
     int ignore_editlist;
     int64_t next_root_atom; ///< offset of the next root atom
+    int atom_depth;
 } MOVContext;
 
 int ff_mp4_read_descr_len(AVIOContext *pb);