From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Sun, 7 Jun 2020 17:52:03 +0000 (+0200)
Subject: segtree: fix asan runtime error
X-Git-Tag: v0.9.6~5
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0435516df8c6983faba4e691ff93bcf6f7400b04;p=thirdparty%2Fnftables.git

segtree: fix asan runtime error

ASAN reports:

 segtree.c:387:30: runtime error: variable length array bound evaluates to non-positive value 0

Update array definition to be the set size plus 1.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---

diff --git a/src/segtree.c b/src/segtree.c
index 266a2b4d..b6ca6083 100644
--- a/src/segtree.c
+++ b/src/segtree.c
@@ -383,8 +383,8 @@ static bool interval_overlap(const struct elementary_interval *e1,
 static int set_overlap(struct list_head *msgs, const struct set *set,
 		       struct expr *init, unsigned int keylen, bool add)
 {
-	struct elementary_interval *new_intervals[init->size];
-	struct elementary_interval *intervals[set->init->size];
+	struct elementary_interval *new_intervals[init->size + 1];
+	struct elementary_interval *intervals[set->init->size + 1];
 	unsigned int n, m, i, j;
 	int ret = 0;