[FFmpeg-cvslog] avcodec/rv34: Clear pointers in ff_rv34_decode_init_thread_copy()

[Michael Niedermayer]

ffmpeg | branch: release/2.4 | Michael Niedermayer <michael at niedermayer.cc> | Sat Jul 18 11:24:45 2015 +0200| [24f1698758f0bd2ed5968cde35ce96ad58ba4c8d] | committer: Michael Niedermayer

avcodec/rv34: Clear pointers in ff_rv34_decode_init_thread_copy()

Avoids leaving stale pointers
Fixes: signal_sigabrt_7ffff70eccc9_819_sabtriple.rm with memlimit 536870912

Found-by: Samuel Groß, Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 3197c0aa87a3b7190e17d49e6fbc7b554e4b3f0a)

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=24f1698758f0bd2ed5968cde35ce96ad58ba4c8d
---

 libavcodec/rv34.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libavcodec/rv34.c b/libavcodec/rv34.c
index a232ab2..6e86ebd 100644
--- a/libavcodec/rv34.c
+++ b/libavcodec/rv34.c
@@ -1534,7 +1534,14 @@ int ff_rv34_decode_init_thread_copy(AVCodecContext *avctx)
 
     if (avctx->internal->is_copy) {
         r->tmp_b_block_base = NULL;
+        r->cbp_chroma       = NULL;
+        r->cbp_luma         = NULL;
+        r->deblock_coefs    = NULL;
+        r->intra_types_hist = NULL;
+        r->mb_type          = NULL;
+
         ff_mpv_idct_init(&r->s);
+
         if ((err = ff_mpv_common_init(&r->s)) < 0)
             return err;
         if ((err = rv34_decoder_alloc(r)) < 0) {