libssh2: fix sftp_statemachine busyloop when *block=true

Closes #18311

diff --git a/lib/vssh/libssh2.c b/lib/vssh/libssh2.c
index f6985ed251b71c986ec77b20d76a841831c39761..ea76482394efa3c10ac8a7faed433d039161f071 100644 (file)
--- a/lib/vssh/libssh2.c
+++ b/lib/vssh/libssh2.c
@@ -3073,7 +3073,7 @@ static CURLcode ssh_statemachine(struct Curl_easy *data,
       break;
     }
 
-  } while(!result && (sshc->state != SSH_STOP));
+  } while(!result && (sshc->state != SSH_STOP) && !*block);
 
   if(result == CURLE_AGAIN) {
     /* we would block, we need to wait for the socket to be ready (in the