blobmsg_json: fix \u escaping for control characters

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

diff --git a/blobmsg_json.c b/blobmsg_json.c
index 7a4ab7b15661bfcd2a8e63b30112e70ca8332652..7e6fca4f0c3a1ab47fa0c0aff0a9450c33c2c85a 100644 (file)
--- a/blobmsg_json.c
+++ b/blobmsg_json.c
@@ -193,7 +193,7 @@ static void blobmsg_format_string(struct strbuf *s, const char *str)
 
                if (escape == 'u') {
                        sprintf(buf + 4, "%02x", (unsigned char) *p);
-                       len = 4;
+                       len = 6;
                } else {
                        len = 2;
                }