From a42189fb8ba9d5e4400e7f31ee121e08a7b18ebc Mon Sep 17 00:00:00 2001
From: Bruce Mitchener <bruce.mitchener@gmail.com>
Date: Wed, 20 Jan 2021 00:28:40 +0700
Subject: [PATCH] conspage: Fix uninitialized memory read. (#242)

If `prior` was not set, then `priorpg` would be uninitialized and
was subsequently used in a comparison. It should be initialized
to `NULL`.
---
 src/conspage.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/conspage.c b/src/conspage.c
index e5b7dff..25e0f14 100644
--- a/src/conspage.c
+++ b/src/conspage.c
@@ -132,6 +132,7 @@ struct conspage *next_conspage(void) {
   init_conspage(page2, 0); /* No next page */
   init_conspage(page1, LPAGE_from_68k(page2));
 
+  priorpg = NULL;
   prior = 0;
   for (pg = (struct conspage *)Addr68k_from_LPAGE(next = ListpDTD->dtd_nextpage);
        next && (next != CONSPAGE_LAST);