From 9195c26d454ca750359db87b1127cd4926c536bd Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Fri, 11 Jul 2014 05:34:13 +0200
Subject: [PATCH] avcodec/rv34: fix crash while seeking on very damaged file

Fixes null pointer dereference
Fixes Ticket2093

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavcodec/rv34.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/rv34.c b/libavcodec/rv34.c
index 873ec3c5a8..d82b41e2a0 100644
--- a/libavcodec/rv34.c
+++ b/libavcodec/rv34.c
@@ -1685,7 +1685,7 @@ int ff_rv34_decode_frame(AVCodecContext *avctx,
 
     /* first slice */
     if (si.start == 0) {
-        if (s->mb_num_left > 0) {
+        if (s->mb_num_left > 0 && s->current_picture_ptr) {
             av_log(avctx, AV_LOG_ERROR, "New frame but still %d MB left.\n",
                    s->mb_num_left);
             ff_er_frame_end(&s->er);