From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Subject: [PATCH nft 2/3] evaluate: memleak in invalid default policy definition
Date: Tue, 28 Jul 2020 20:17:09 +0200 [thread overview]
Message-ID: <20200728181710.14919-2-pablo@netfilter.org> (raw)
In-Reply-To: <20200728181710.14919-1-pablo@netfilter.org>
Release the clone expression from the exit path.
Fixes: 5173151863d3 ("evaluate: replace variable expression by the value expression")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
src/evaluate.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/src/evaluate.c b/src/evaluate.c
index e529a7f08e14..536325e83537 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -2017,8 +2017,10 @@ static int expr_evaluate_variable(struct eval_ctx *ctx, struct expr **exprp)
{
struct expr *new = expr_clone((*exprp)->sym->expr);
- if (expr_evaluate(ctx, &new) < 0)
+ if (expr_evaluate(ctx, &new) < 0) {
+ expr_free(new);
return -1;
+ }
expr_free(*exprp);
*exprp = new;
--
2.20.1
next prev parent reply other threads:[~2020-07-28 18:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-28 18:17 [PATCH nft 1/3] parser_bison: memleak symbol redefinition Pablo Neira Ayuso
2020-07-28 18:17 ` Pablo Neira Ayuso [this message]
2020-07-28 18:17 ` [PATCH nft 3/3] evaluate: UAF in hook priority expression Pablo Neira Ayuso
-- strict thread matches above, loose matches on Subject: below --
2020-07-28 18:15 [PATCH nft 1/3] parser_bison: memleak symbol redefinition Pablo Neira Ayuso
2020-07-28 18:15 ` [PATCH nft 2/3] evaluate: memleak in invalid default policy definition Pablo Neira Ayuso
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