From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F3D33C43217 for ; Sun, 9 Oct 2022 22:35:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232869AbiJIWdj (ORCPT ); Sun, 9 Oct 2022 18:33:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232606AbiJIWaA (ORCPT ); Sun, 9 Oct 2022 18:30:00 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D17C53AB2A; Sun, 9 Oct 2022 15:19:32 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 80941B80DCD; Sun, 9 Oct 2022 22:19:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2F3F1C4347C; Sun, 9 Oct 2022 22:19:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1665353971; bh=dhesYESLw7bTXaKvEjErN0W2PUaj4hZbUAj0arHb+6U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fSKfyAeWGHDyr7/I1tM+zqLmyR4PvZCMDhJKjXIOPdSU6xl7z/hFK4kWNY83BRVfC ZCkqVLXEM+JMQ66k9PPqTYySkQmy3PBSeyG2ztEIWfQ+Sy+Bpv+KDnzPHJgG9vrZhS gF+/6T1mwRVRT48StEC5/5WqEuoflUt64nyXh/RUdU5MIZuN2IRLZ6XXoXl13PiLrr r3IZYd6T4BH5X5UQEr/FMARidCgUhwJavloW29s8xLEdih5ROOQuWDMOYsT0PUzOcN c9HOygUML8yX7/kTG8+dMQsXwNNVvvKRZ2CrFruU5ev+R79OAV32i9Sc34ebzyajfK 3mc5HQkRK/Wcw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Mike Pattrick , "David S . Miller" , Sasha Levin , pshelar@ovn.org, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org, dev@openvswitch.org Subject: [PATCH AUTOSEL 5.15 06/46] openvswitch: Fix double reporting of drops in dropwatch Date: Sun, 9 Oct 2022 18:18:31 -0400 Message-Id: <20221009221912.1217372-6-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221009221912.1217372-1-sashal@kernel.org> References: <20221009221912.1217372-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mike Pattrick [ Upstream commit 1100248a5c5ccd57059eb8d02ec077e839a23826 ] Frames sent to userspace can be reported as dropped in ovs_dp_process_packet, however, if they are dropped in the netlink code then netlink_attachskb will report the same frame as dropped. This patch checks for error codes which indicate that the frame has already been freed. Signed-off-by: Mike Pattrick Link: https://bugzilla.redhat.com/show_bug.cgi?id=2109946 Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/openvswitch/datapath.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index 5e2c83cb7b12..f4b088d418fb 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -251,10 +251,17 @@ void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) upcall.mru = OVS_CB(skb)->mru; error = ovs_dp_upcall(dp, skb, key, &upcall, 0); - if (unlikely(error)) - kfree_skb(skb); - else + switch (error) { + case 0: + case -EAGAIN: + case -ERESTARTSYS: + case -EINTR: consume_skb(skb); + break; + default: + kfree_skb(skb); + break; + } stats_counter = &stats->n_missed; goto out; } -- 2.35.1