From: Pasi Kallinen <paxed@alt.org>
Date: Fri, 20 Nov 2015 10:27:46 +0000 (+0200)
Subject: Fix segfault if lev_comp could not alloc memory for opcode
X-Git-Tag: NetHack-3.6.0_RC01~41
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9518e74c93e08f9c7dcc4512ddeb3f3329bb01c0;p=nethack

Fix segfault if lev_comp could not alloc memory for opcode
---

diff --git a/util/lev_main.c b/util/lev_main.c
index f17d9c416..aefe18ae4 100644
--- a/util/lev_main.c
+++ b/util/lev_main.c
@@ -1294,11 +1294,13 @@ genericptr_t dat;
         lc_error("Unknown opcode '%d'", opc);
 
     tmp = (_opcode *) alloc(sizeof(_opcode) * (nop + 1));
-    if (sp->opcodes && nop) {
+    if (sp->opcodes && nop && tmp) {
         (void) memcpy(tmp, sp->opcodes, sizeof(_opcode) * nop);
         free(sp->opcodes);
-    } else if (!tmp)
+    } else if (!tmp) {
         lc_error("Could not alloc opcode space");
+        return;
+    }
 
     sp->opcodes = tmp;