Index: main/channel.c
===================================================================
--- main/channel.c	(revision 206581)
+++ main/channel.c	(working copy)
@@ -1726,10 +1726,12 @@
 	if (chan->cdr && !ast_test_flag(chan->cdr, AST_CDR_FLAG_BRIDGED) && 
 		!ast_test_flag(chan->cdr, AST_CDR_FLAG_POST_DISABLED) && 
 	    (chan->cdr->disposition != AST_CDR_NULL || ast_test_flag(chan->cdr, AST_CDR_FLAG_DIALED))) {
+		ast_channel_lock(chan);
 			
 		ast_cdr_end(chan->cdr);
 		ast_cdr_detach(chan->cdr);
 		chan->cdr = NULL;
+		ast_channel_unlock(chan);
 	}
 	
 	ast_channel_free(chan);