Access QoS field after validating topic length

PUBLISHED_FROM=6f2d9849d75ca1ec2b6dade11ccad8d0c5d4b3bd

Access QoS field after validating topic length
PUBLISHED_FROM=6f2d9849d75ca1ec2b6dade11ccad8d0c5d4b3bd
f857f639 · Deomid Ryabkov · Cesanta Bot · 97d733e1 · f857f639
Commit f857f639 authored Sep 06, 2017 by Deomid Ryabkov Committed by Cesanta Bot Sep 06, 2017
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mongoose.c mongoose.c +1 -1

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--- a/mongoose.c
+++ b/mongoose.c
@@ -10263,9 +10263,9 @@ int mg_mqtt_next_subscribe_topic(struct mg_mqtt_message *msg,
  topic->len = buf[0] << 8 | buf[1];
  topic->p = (char *) buf + 2;
-  *qos = buf[2 + topic->len];
  new_pos = pos + 2 + topic->len + 1;
  if ((size_t) new_pos > msg->payload.len) return -1;
+  *qos = buf[2 + topic->len];
  return new_pos;
 }