commit 96c149685bff881b30493acf0fed1fc4cd5520ee
author Daniel Stenberg <daniel@haxx.se> Mon Apr 20 17:03:18 2020 +0200
committer Daniel Stenberg <daniel@haxx.se> Mon Apr 20 22:34:44 2020 +0200
tree bfce2c32f293f735160af925833e28572c556ed1
parent fa7daafdbcd41f45bf082a0e834945034bf03203

mqtt: fix Curl_read()  error handling while reading remaining length

Detected by Coverity. CID 1462320.

Closes #5274

lib/mqtt.c

diff --git a/lib/mqtt.c b/lib/mqtt.c
index 35c1b3e..4443336 100644
--- a/lib/mqtt.c
+++ b/lib/mqtt.c
@@ -569,6 +569,8 @@
         Curl_debug(data, CURLINFO_HEADER_IN, (char *)&byte, 1);
       pkt[mq->npacket++] = byte;
     } while((byte & 0x80) && (mq->npacket < 4));
+    if(result)
+      break;
     mq->remaining_length = mqtt_decode_len(&pkt[0], mq->npacket, NULL);
     mq->npacket = 0;
     if(mq->remaining_length) {