From: Yann E. MORIN <yann.morin.1998@free.fr>
Date: Mon, 16 Feb 2015 17:49:16 +0000 (+0100)
Subject: fs/tar: only store numeric uid/gid
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=66ee6dc8721ce8746a8352f02f52663b90887c63;p=buildroot.git

fs/tar: only store numeric uid/gid

If a target user is asigned a UID (e.g. 1000) that happens to also exist
on the build machine, tar will happily store the username for that user.

This can be seen by some as potential information disclosure.

Instruct tar to just store the numeric uid/gid.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---

diff --git a/fs/tar/tar.mk b/fs/tar/tar.mk
index 780827e42f..28219cf052 100644
--- a/fs/tar/tar.mk
+++ b/fs/tar/tar.mk
@@ -7,7 +7,7 @@
 TAR_OPTS := $(call qstrip,$(BR2_TARGET_ROOTFS_TAR_OPTIONS))
 
 define ROOTFS_TAR_CMD
-	tar -c$(TAR_OPTS)f $@ -C $(TARGET_DIR) .
+	tar -c$(TAR_OPTS)f $@ --numeric-owner -C $(TARGET_DIR) .
 endef
 
 $(eval $(call ROOTFS_TARGET,tar))