Fix valgrind and asan memory leaks and crashes.

libavcodec/pthread.c

Index: libavcodec/pthread.c
diff --git a/libavcodec/pthread.c b/libavcodec/pthread.c
index 6ae763da8045e839b3859ad65f8cb5117b6bd871..e90a0a02888602e7993d093b01d0bcfbf285e9cb 100644
--- a/libavcodec/pthread.c
+++ b/libavcodec/pthread.c
@@ -610,6 +610,7 @@ int ff_thread_decode_frame(AVCodecContext *avctx,
      * Submit a packet to the next decoding thread.
      */
 
+    if (fctx->next_decoding >= avctx->thread_count) return err;

[DaleCurtis, 2012/02/09 22:43:26]

Proper fix is likely related to acolwell's threading fixes, this prevents the
crash for now.

[rbultje1, 2012/02/09 23:28:46]

This looks really evil, I'm OK with the workaround but where do I find this
file? I'd like to have a look at it to see if there's a better fix.

[DaleCurtis, 2012/02/10 00:04:01]

I've commented on valgrind.txt to link each test file with each report.

http://xorax.sea/ffmpeg-security/111342.ogm

     p = &fctx->threads[fctx->next_decoding];
     err = update_context_from_user(p->avctx, avctx);
     if (err) return err;