http2: fail if connection terminated without END_STREAM

Closes #6736

1 files changed, 11 insertions, 0 deletions

diff --git a/lib/http2.c b/lib/http2.c
index c6507e6f6..01322cb01 100644
--- a/lib/http2.c
+++ b/lib/http2.c
@@ -1729,6 +1729,17 @@ static ssize_t http2_recv(struct Curl_easy *data, int sockindex,
       }
 
       if(nread == 0) {
+        if(!stream->closed) {
+          /* This will happen when the server or proxy server is SIGKILLed
+             during data transfer. We should emit an error since our data
+             received may be incomplete. */
+          failf(data, "HTTP/2 stream %d was not closed cleanly before"
+                " end of the underlying stream",
+                stream->stream_id);
+          *err = CURLE_HTTP2_STREAM;
+          return -1;
+        }
+
         H2BUGF(infof(data, "end of stream\n"));
         *err = CURLE_OK;
         return 0;