From patchwork Thu Apr 21 10:12:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?Q2zDqW1lbnQgTMOpZ2Vy?= X-Patchwork-Id: 12821424 X-Patchwork-Delegate: kuba@kernel.org 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 3622AC433F5 for ; Thu, 21 Apr 2022 10:14:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1388218AbiDUKR1 (ORCPT ); Thu, 21 Apr 2022 06:17:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43998 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1388288AbiDUKRR (ORCPT ); Thu, 21 Apr 2022 06:17:17 -0400 Received: from relay4-d.mail.gandi.net (relay4-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::224]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8E7A92CCA6; Thu, 21 Apr 2022 03:14:17 -0700 (PDT) Received: (Authenticated sender: clement.leger@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 544DEE000C; Thu, 21 Apr 2022 10:14:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1650536055; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=an69hgvRkZo4fDphZoWRjZyAXfGzKRGmPZzwE3TFtww=; b=UVU1MzSboPYmjJnNfcM3Qk71BBGbWaDl9mydrmQzASqiNP//6Bi6Fu7YwJTbLVt6SLIql3 2hUt6A5FNi+3wHF/DKZC3lnjDm378xiXMZKwensfWYZ7kwrQY1tBsq5+o1M0bNXD+WOp0l 0NKFeqwrqVqtEbBAcMb+LrMHJ7mb2mjJqnKBFspRVFslA63voqp+i1j0sS5AxTeGQWVolD S3OMLJ5aW690aZdHUX2lgVPqt20ErhXno7ixftgee6PvkgoWMEAj+rz6NbczFSA+n5f7/A 3gD59XFMH3ld/VwWT4vyP8YjlG3rdn4sdY2RvHOcQC88fE90XMBL+LBbzWNMGQ== From: =?utf-8?b?Q2zDqW1lbnQgTMOpZ2Vy?= To: Roopa Prabhu , Nikolay Aleksandrov , "David S. Miller" , Jakub Kicinski , Paolo Abeni , Tobias Waldekranz Cc: bridge@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?b?Q2zDqW1lbnQgTMOpZ2Vy?= Subject: [PATCH net-next] net: bridge: switchdev: check br_vlan_group() return value Date: Thu, 21 Apr 2022 12:12:47 +0200 Message-Id: <20220421101247.121896-1-clement.leger@bootlin.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org br_vlan_group() can return NULL and thus return value must be checked to avoid dereferencing a NULL pointer. Fixes: 6284c723d9b9 ("net: bridge: mst: Notify switchdev drivers of VLAN MSTI migrations") Signed-off-by: Clément Léger Acked-by: Nikolay Aleksandrov --- net/bridge/br_switchdev.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c index 81400e0b26ac..8f3d76c751dd 100644 --- a/net/bridge/br_switchdev.c +++ b/net/bridge/br_switchdev.c @@ -354,6 +354,8 @@ static int br_switchdev_vlan_attr_replay(struct net_device *br_dev, attr.orig_dev = br_dev; vg = br_vlan_group(br); + if (!vg) + return 0; list_for_each_entry(v, &vg->vlan_list, vlist) { if (v->msti) {