From e0b3ef3c20810f7148d350ab17afd0ae8d433693 Mon Sep 17 00:00:00 2001
From: Tatsuya Kinoshita <tats@debian.org>
Date: Wed, 24 Aug 2016 19:05:31 +0900
Subject: Prevent segfault for formUpdateBuffer

Bug-Debian: https://github.com/tats/w3m/issues/22 [CVE-2016-9440]
Origin: https://anonscm.debian.org/cgit/collab-maint/w3m.git/commit/?id=4a8d16fc8d08206dd7142435054ee38ff41805b7
---
 form.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'form.c')

diff --git a/form.c b/form.c
index 779ba2f..20b7310 100644
--- a/form.c
+++ b/form.c
@@ -461,6 +461,8 @@ formUpdateBuffer(Anchor *a, Buffer *buf, FormItemList *form)
 #endif				/* MENU_SELECT */
 	    p = form->value->ptr;
 	l = buf->currentLine;
+	if (!l)
+	    break;
 	if (form->type == FORM_TEXTAREA) {
 	    int n = a->y - buf->currentLine->linenumber;
 	    if (n > 0)
-- 
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