From 80be1d0ee9eb77166853100439cda59747be4b55 Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@cryptomilk.org>
Date: Mon, 1 Oct 2018 20:48:17 +0200
Subject: [PATCH] legacy: Fix possible null pointer dereference

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
---
 src/legacy.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/legacy.c b/src/legacy.c
index c35ec337..b92ee662 100644
--- a/src/legacy.c
+++ b/src/legacy.c
@@ -545,6 +545,10 @@ ssh_string publickey_to_string(ssh_public_key pubkey) {
     ssh_string key_blob;
     int rc;
 
+    if (pubkey == NULL) {
+        return NULL;
+    }
+
     key = ssh_key_new();
     if (key == NULL) {
         return NULL;