libubox: backport security patches

This backports some security relevant patches from libubox master. These
patches should not change the existing API and ABI so that old
applications still work like before without any recompilation.
Application can now also use more secure APIs.

The new more secure interfaces are also available, but not used.

OpenWrt master and 19.07 already have these patches by using a more
recent libubox version.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 39 insertions, 0 deletions

diff --git a/package/libs/libubox/patches/0010-blobmsg-fix-array-out-of-bounds-GCC-10-warning.patch b/package/libs/libubox/patches/0010-blobmsg-fix-array-out-of-bounds-GCC-10-warning.patch
new file mode 100644
index 0000000000..61f73493df
--- /dev/null
+++ b/package/libs/libubox/patches/0010-blobmsg-fix-array-out-of-bounds-GCC-10-warning.patch
@@ -0,0 +1,39 @@
+From 44d9e85ef058fbb9981d53218cafdc451afa5535 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz@true.cz>
+Date: Wed, 25 Dec 2019 10:27:59 +0100
+Subject: blobmsg: fix array out of bounds GCC 10 warning
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Fixes following warning reported by GCC 10.0.0 20191203:
+
+ blobmsg.c:234:2: error: 'strcpy' offset 6 from the object at 'attr' is out of the bounds of referenced subobject 'name' with type 'uint8_t[0]' {aka 'unsigned char[0]'} at offset 6 [-Werror=array-bounds]
+   234 |  strcpy((char *) hdr->name, (const char *)name);
+       |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+ In file included from blobmsg.c:16:
+ blobmsg.h:42:10: note: subobject 'name' declared here
+    42 |  uint8_t name[];
+       |          ^~~~
+
+Reported-by: Khem Raj <raj.khem@gmail.com>
+Signed-off-by: Petr Štetiar <ynezz@true.cz>
+---
+ blobmsg.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+--- a/blobmsg.c
++++ b/blobmsg.c
+@@ -246,7 +246,10 @@ blobmsg_new(struct blob_buf *buf, int ty
+ 	attr->id_len |= be32_to_cpu(BLOB_ATTR_EXTENDED);
+ 	hdr = blob_data(attr);
+ 	hdr->namelen = cpu_to_be16(namelen);
+-	strcpy((char *) hdr->name, (const char *)name);
++
++	memcpy(hdr->name, name, namelen);
++	hdr->name[namelen] = '\0';
++
+ 	pad_end = *data = blobmsg_data(attr);
+ 	pad_start = (char *) &hdr->name[namelen];
+ 	if (pad_start < pad_end)