linux-kernel - [PATCH 4.19 146/152] netfilter: nf_tables: fix flush after rule deletion in the same batch

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190225195054.683380412@linuxfoundation.org>
Date:   Mon, 25 Feb 2019 22:12:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Phil Sutter <phil@....cc>,
        Pablo Neira Ayuso <pablo@...filter.org>
Subject: [PATCH 4.19 146/152] netfilter: nf_tables: fix flush after rule deletion in the same batch

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pablo Neira Ayuso <pablo@...filter.org>

commit 23b7ca4f745f21c2b9cfcb67fdd33733b3ae7e66 upstream.

Flush after rule deletion bogusly hits -ENOENT. Skip rules that have
been already from nft_delrule_by_chain() which is always called from the
flush path.

Fixes: cf9dc09d0949 ("netfilter: nf_tables: fix missing rules flushing per table")
Reported-by: Phil Sutter <phil@....cc>
Acked-by: Phil Sutter <phil@....cc>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/netfilter/nf_tables_api.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -291,6 +291,9 @@ static int nft_delrule_by_chain(struct n
 	int err;
 
 	list_for_each_entry(rule, &ctx->chain->rules, list) {
+		if (!nft_is_active_next(ctx->net, rule))
+			continue;
+
 		err = nft_delrule(ctx, rule);
 		if (err < 0)
 			return err;