From nobody Thu Sep 11 12:49:21 2025 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 EFF0AC001DF for ; Fri, 4 Aug 2023 15:54:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232141AbjHDPyP (ORCPT ); Fri, 4 Aug 2023 11:54:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49506 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229723AbjHDPyN (ORCPT ); Fri, 4 Aug 2023 11:54:13 -0400 Received: from mail.ispras.ru (mail.ispras.ru [83.149.199.84]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CC5BAB2; Fri, 4 Aug 2023 08:54:11 -0700 (PDT) Received: from localhost.localdomain (unknown [46.242.14.200]) by mail.ispras.ru (Postfix) with ESMTPSA id 599B740737A6; Fri, 4 Aug 2023 15:54:09 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 mail.ispras.ru 599B740737A6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ispras.ru; s=default; t=1691164449; bh=YvUW9Cp+Mgnt3NWK0TLcArIpRQkO34R2ZFK4uY/nVAY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i3fmj5v0XOM8fy738lUg5Z/9hLHpFdfPe6MKTPXqwVa9at2oGAbq7NWeNnCddU+qn 6tyEnnuur68eUKg99cSn5nsEiIIk4/59BJI4LXT6wZWxSRKzbNZV7PREX4D0y8ECS5 7Fx6ICbUXuKFNA1bB4mShBLs4XXLy7BZwLHPQkq8= From: Fedor Pchelkin To: Ido Schimmel Cc: Fedor Pchelkin , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Nikolay Aleksandrov , Roopa Prabhu , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alexey Khoroshilov , lvc-project@linuxtesting.org Subject: [PATCH net v2] drivers: vxlan: vnifilter: free percpu vni stats on error path Date: Fri, 4 Aug 2023 18:53:36 +0300 Message-ID: <20230804155337.18135-1-pchelkin@ispras.ru> X-Mailer: git-send-email 2.41.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" In case rhashtable_lookup_insert_fast() fails inside vxlan_vni_add(), the allocated percpu vni stats are not freed on the error path. Introduce vxlan_vni_free() which would work as a nice wrapper to free vxlan_vni_node resources properly. Found by Linux Verification Center (linuxtesting.org). Fixes: 4095e0e1328a ("drivers: vxlan: vnifilter: per vni stats") Suggested-by: Ido Schimmel Signed-off-by: Fedor Pchelkin --- v1->v2: per Ido Schimmel's suggestion, extract freeing vninode resources into a separate function vxlan_vni_free() and tag the patch as for 'net' drivers/net/vxlan/vxlan_vnifilter.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/net/vxlan/vxlan_vnifilter.c b/drivers/net/vxlan/vxlan_= vnifilter.c index a3de081cda5e..c3ff30ab782e 100644 --- a/drivers/net/vxlan/vxlan_vnifilter.c +++ b/drivers/net/vxlan/vxlan_vnifilter.c @@ -713,6 +713,12 @@ static struct vxlan_vni_node *vxlan_vni_alloc(struct v= xlan_dev *vxlan, return vninode; } =20 +static void vxlan_vni_free(struct vxlan_vni_node *vninode) +{ + free_percpu(vninode->stats); + kfree(vninode); +} + static int vxlan_vni_add(struct vxlan_dev *vxlan, struct vxlan_vni_group *vg, u32 vni, union vxlan_addr *group, @@ -740,7 +746,7 @@ static int vxlan_vni_add(struct vxlan_dev *vxlan, &vninode->vnode, vxlan_vni_rht_params); if (err) { - kfree(vninode); + vxlan_vni_free(vninode); return err; } =20 @@ -763,8 +769,7 @@ static void vxlan_vni_node_rcu_free(struct rcu_head *rc= u) struct vxlan_vni_node *v; =20 v =3D container_of(rcu, struct vxlan_vni_node, rcu); - free_percpu(v->stats); - kfree(v); + vxlan_vni_free(v); } =20 static int vxlan_vni_del(struct vxlan_dev *vxlan, --=20 2.41.0