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Subject: Prevent segfault with malformed table_alt
Author: Tatsuya Kinoshita <tats@debian.org>
Bug-Debian: https://github.com/tats/w3m/issues/24 [CVE-2016-9441]
Origin: https://anonscm.debian.org/cgit/collab-maint/w3m.git/commit/?id=a6257663824c63abb3c62c4dd62455fe6f63d958
diff --git a/table.c b/table.c
index a54ea01..022effe 100644
--- a/table.c
+++ b/table.c
@@ -761,7 +761,7 @@ do_refill(struct table *tbl, int row, int col, int maxlimit)
struct parsed_tag *tag;
if ((tag = parse_tag(&p, TRUE)) != NULL)
parsedtag_get_value(tag, ATTR_TID, &id);
- if (id >= 0 && id < tbl->ntable) {
+ if (id >= 0 && id < tbl->ntable && tbl->tables[id].ptr) {
int alignment;
TextLineListItem *ti;
struct table *t = tbl->tables[id].ptr;
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