buildroot/package/libubox/0001-blobmsg-fix-array-out-of-bounds-GCC-10-warning.patch

From eb7eb6393d47a918c420f5b287946dbd6c0d5f57 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Petr=20=C5=A0tetiar?= <ynezz@true.cz>
Date: Wed, 25 Dec 2019 10:27:59 +0100
Subject: [PATCH] blobmsg: fix array out of bounds GCC 10 warning
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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 Å tetiar <ynezz@true.cz>
[Retrieved from:
https://git.openwrt.org/?p=project/libubox.git;a=commit;h=eb7eb6393d47a918c420f5b287946dbd6c0d5f57]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
 blobmsg.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/blobmsg.c b/blobmsg.c
index 48dba81..37821c3 100644
--- a/blobmsg.c
+++ b/blobmsg.c
@@ -240,7 +240,10 @@ blobmsg_new(struct blob_buf *buf, int type, const char *name, int payload_len, v
 	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)
-- 
2.20.1