properly null-terminate formatted json strings

diff --git a/blobmsg_json.c b/blobmsg_json.c
index 896a9c2e8c001dd9e25de29298d7ffdb39ec3e36..8195763936a03d8f182127cf5f05a2c4b12d4db0 100644 (file)
--- a/blobmsg_json.c
+++ b/blobmsg_json.c
@@ -263,5 +263,7 @@ char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list, blobmsg_jso
                return NULL;
 
        s.buf = realloc(s.buf, s.pos + 1);
+       s.buf[s.pos] = 0;
+
        return s.buf;
 }