utils/tar: Fix tar build dependency and CVE-2016-6321

Should be PKG_BUILD_DEPENDS not BUILD_DEPENDS

Signed-off-by: Daniel Dickinson <lede@daniel.thecshore.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

utils/tar/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=tar
 PKG_VERSION:=1.29
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=@GNU/$(PKG_NAME)
@@ -21,7 +21,7 @@ PKG_LICENSE_FILES:=COPYING
 
 PKG_INSTALL:=1
 
-BUILD_DEPENDS:=xz
+PKG_BUILD_DEPENDS:=xz
 
 include $(INCLUDE_DIR)/package.mk
 

utils/tar/patches/001-CVE-2016-6321.patch

@@ -0,0 +1,30 @@
+From 7340f67b9860ea0531c1450e5aa261c50f67165d Mon Sep 17 00:00:00 2001
+From: Paul Eggert <eggert@Penguin.CS.UCLA.EDU>
+Date: Sat, 29 Oct 2016 21:04:40 -0700
+Subject: When extracting, skip ".." members
+
+* src/extract.c (extract_archive): Skip members whose names
+contain "..".
+--- a/src/extract.c
++++ b/src/extract.c
+@@ -1629,12 +1629,20 @@ extract_archive (void)
+ {
+   char typeflag;
+   tar_extractor_t fun;
++  bool skip_dotdot_name;
+ 
+   fatal_exit_hook = extract_finish;
+ 
+   set_next_block_after (current_header);
+ 
++  skip_dotdot_name = (!absolute_names_option
++		      && contains_dot_dot (current_stat_info.orig_file_name));
++  if (skip_dotdot_name)
++    ERROR ((0, 0, _("%s: Member name contains '..'"),
++	    quotearg_colon (current_stat_info.orig_file_name)));
++
+   if (!current_stat_info.file_name[0]
++      || skip_dotdot_name
+       || (interactive_option
+ 	  && !confirm ("extract", current_stat_info.file_name)))
+     {