X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/78e71de13e688b0aef0128115c0f23d5d52b5aa7..6df3c104f2ee9429bef67134ec0eedd5cd26cc08:/ssh.c

diff --git a/ssh.c b/ssh.c
index 750017f6..ef503bf5 100644
--- a/ssh.c
+++ b/ssh.c
@@ -5778,6 +5778,12 @@ static int do_ssh2_transport(Ssh ssh, void *vin, int inlen,
 		break;
 	    }
 	}
+	if (!ssh->hostkey) {
+	    bombout(("Couldn't agree a host key algorithm (available: %s)",
+		     str ? str : "(null)"));
+	    crStop(0);
+	}
+
 	s->guessok = s->guessok &&
 	    first_in_commasep_string(hostkey_algs[0]->name, str, len);
 	ssh_pkt_getstring(pktin, &str, &len);    /* client->server cipher */