From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 EB60C1C29 for ; Wed, 23 Nov 2022 09:17:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3645CC433D6; Wed, 23 Nov 2022 09:17:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1669195044; bh=FbKiOSvjV+jJEQIIhM3Jg2i8iFQpugwOgF/soOb1W0c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SBfAII0wbNvCdyiIEInPE7i8zJYDRaoQLWwSHvduPX5hBQnThFExuDxaiE1WK6rT0 M3y90Ijeht2ETw8Kbpxm9eQGBC00pI0qaF91VSzqEsr3+mFSXx5vJx5WTP1Fzd72sl i2r0prrw2bLLy2v7eeWKuutn7aE6xOTsfIEcEIcc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chuang Wang , "David S. Miller" , Sasha Levin Subject: [PATCH 5.4 101/156] net: macvlan: Use built-in RCU list checking Date: Wed, 23 Nov 2022 09:50:58 +0100 Message-Id: <20221123084601.634260773@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221123084557.816085212@linuxfoundation.org> References: <20221123084557.816085212@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Chuang Wang [ Upstream commit 5df1341ea822292275c56744aab9c536d75c33be ] hlist_for_each_entry_rcu() has built-in RCU and lock checking. Pass cond argument to hlist_for_each_entry_rcu() to silence false lockdep warning when CONFIG_PROVE_RCU_LIST is enabled. Execute as follow: ip link add link eth0 type macvlan mode source macaddr add The rtnl_lock is held when macvlan_hash_lookup_source() or macvlan_fill_info_macaddr() are called in the non-RCU read side section. So, pass lockdep_rtnl_is_held() to silence false lockdep warning. Fixes: 79cf79abce71 ("macvlan: add source mode") Signed-off-by: Chuang Wang Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/macvlan.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 253c0605f6e6..29c70d5e3926 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -138,7 +138,7 @@ static struct macvlan_source_entry *macvlan_hash_lookup_source( u32 idx = macvlan_eth_hash(addr); struct hlist_head *h = &vlan->port->vlan_source_hash[idx]; - hlist_for_each_entry_rcu(entry, h, hlist) { + hlist_for_each_entry_rcu(entry, h, hlist, lockdep_rtnl_is_held()) { if (ether_addr_equal_64bits(entry->addr, addr) && entry->vlan == vlan) return entry; @@ -1604,7 +1604,7 @@ static int macvlan_fill_info_macaddr(struct sk_buff *skb, struct hlist_head *h = &vlan->port->vlan_source_hash[i]; struct macvlan_source_entry *entry; - hlist_for_each_entry_rcu(entry, h, hlist) { + hlist_for_each_entry_rcu(entry, h, hlist, lockdep_rtnl_is_held()) { if (entry->vlan != vlan) continue; if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr)) -- 2.35.1