From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8F42B484226; Thu, 20 Aug 2026 17:52:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787248370; cv=none; b=M5GKjpBDF/gf2rCytFJtvQScdMdL5Y5BzErgYhOUyl1vpLJc7S30lTV99SvpGeYHvGsputmjuloZt4nVdsxE/mtYP9Tua4mYIVXmtlU97BC8xszhy6XgjU6alfvDz+I1Icfm4R3PPFJ9K+L4dED7pz4SOLsoLvfdI4GyaX0lHHs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787248370; c=relaxed/simple; bh=peDJPA01hoMlOT1havBNCAcTP0+wx2d7z0t0UoT9Ies=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HOBiu51I31eTd5hTSBHYhSOjnE99xynE/q6SvIf/+CbiWu7HQf8npjZQZmxLpc/bm8V/sQ0YM/ZdH7Q1znBTESnznuQ/VI1SdGLT2XaYG/VgQdTS8F16Rxbn9nEL5NJfQ0HG59GEHRTuZbkW3lsXs3xwT2XatnIBjp1TfzDdbSQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=apRCRocc; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="apRCRocc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EB10E1F000E9; Thu, 20 Aug 2026 17:52:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1787248369; bh=BU+qtB86zEvY9PBtFZXRojvNHfqZDpFKBhtIMd+/uQA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=apRCRoccfhxvJekbt+wx/h8li6r4oXiZGkjF3NEKMQH7aXKXlA4PoKuRBUGWZ3exH bYHjEfqysiIvNa+l9YSOMbjet/JvSXM7R1KnalS0Smqtn9NcAq9a1ALut+QvOhXpFz bVz6T3t7EhKyvw4EelDWf+MiuIZFQfU9Q07SBIuc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Matthieu Baerts (NGI0)" , Geliang Tang , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.1 205/303] mptcp: pm: avoid code duplication to lookup endp Date: Thu, 20 Aug 2026 16:55:41 +0200 Message-ID: <20260820145259.550906149@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260820145253.200766705@linuxfoundation.org> References: <20260820145253.200766705@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Geliang Tang [ Upstream commit 1d7fa6ceb91fddbe38cae3521d5d1075bce6a00e ] The helper __lookup_addr() can be used in mptcp_pm_nl_get_local_id() and mptcp_pm_nl_is_backup() to simplify the code, and avoid code duplication. Co-developed-by: Matthieu Baerts (NGI0) Signed-off-by: Matthieu Baerts (NGI0) Signed-off-by: Geliang Tang Signed-off-by: Matthieu Baerts (NGI0) Link: https://patch.msgid.link/20241115-net-next-mptcp-pm-lockless-dump-v1-2-f4a1bcb4ca2c@kernel.org Signed-off-by: Jakub Kicinski Stable-dep-of: 9bc6d5e4ca9f ("mptcp: pm: userspace: fix use-after-free in get_local_id") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- net/mptcp/pm_netlink.c | 20 ++++++-------------- 1 file changed, 6 insertions(+), 14 deletions(-) --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -1266,17 +1266,13 @@ int mptcp_pm_nl_get_local_id(struct mptc { struct mptcp_pm_addr_entry *entry; struct pm_nl_pernet *pernet; - int ret = -1; + int ret; pernet = pm_nl_get_pernet_from_msk(msk); rcu_read_lock(); - list_for_each_entry_rcu(entry, &pernet->local_addr_list, list) { - if (mptcp_addresses_equal(&entry->addr, skc, entry->addr.port)) { - ret = entry->addr.id; - break; - } - } + entry = __lookup_addr(pernet, skc); + ret = entry ? entry->addr.id : -1; rcu_read_unlock(); if (ret >= 0) return ret; @@ -1303,15 +1299,11 @@ bool mptcp_pm_nl_is_backup(struct mptcp_ { struct pm_nl_pernet *pernet = pm_nl_get_pernet_from_msk(msk); struct mptcp_pm_addr_entry *entry; - bool backup = false; + bool backup; rcu_read_lock(); - list_for_each_entry_rcu(entry, &pernet->local_addr_list, list) { - if (mptcp_addresses_equal(&entry->addr, skc, entry->addr.port)) { - backup = !!(entry->flags & MPTCP_PM_ADDR_FLAG_BACKUP); - break; - } - } + entry = __lookup_addr(pernet, skc); + backup = entry && !!(entry->flags & MPTCP_PM_ADDR_FLAG_BACKUP); rcu_read_unlock(); return backup;