rest_api: Fix encoded payload length check

Change-Id: I4224102dd924dfded59e3a489079d02ca0237983
---
M src/rest_api.c
1 file changed, 3 insertions(+), 2 deletions(-)


git pull ssh://gerrit.osmocom.org:29418/osmo-cbc refs/changes/97/41997/1

diff --git a/src/rest_api.c b/src/rest_api.c
index 3af50e6..6834dca 100644
--- a/src/rest_api.c
+++ b/src/rest_api.c
@@ -348,8 +348,9 @@
 				return -EINVAL;
 			}
 			hexstr = json_string_value(jpage);
-			if (strlen(hexstr) > 88 * 2) {
-				*errstr = "'pages' array must contain strings up to 88 hex nibbles";
+			/* The total page length is 88, but the header is 6 bytes length */
+			if (strlen(hexstr) > sizeof(out->cbs.data[i]) * 2) {
+				*errstr = "'pages' actual data array must contain strings up to 82 hex nibbles";
 				return -EINVAL;
 			}
 			len = osmo_hexparse(hexstr, out->cbs.data[i], sizeof(out->cbs.data[i]));

