From patchwork Thu Jul 22 20:28:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Greear X-Patchwork-Id: 484260 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8A6AC4338F for ; Thu, 22 Jul 2021 20:28:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C6E4360EB1 for ; Thu, 22 Jul 2021 20:28:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230437AbhGVTsH (ORCPT ); Thu, 22 Jul 2021 15:48:07 -0400 Received: from dispatch1-us1.ppe-hosted.com ([148.163.129.48]:36872 "EHLO dispatch1-us1.ppe-hosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230266AbhGVTsG (ORCPT ); Thu, 22 Jul 2021 15:48:06 -0400 X-Virus-Scanned: Proofpoint Essentials engine Received: from mx1-us1.ppe-hosted.com (unknown [10.7.67.131]) by mx1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTPS id 46C692006D for ; Thu, 22 Jul 2021 20:28:40 +0000 (UTC) Received: from mail3.candelatech.com (mail2.candelatech.com [208.74.158.173]) by mx1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTP id 262F9980068 for ; Thu, 22 Jul 2021 20:28:40 +0000 (UTC) Received: from ben-dt4.candelatech.com (50-251-239-81-static.hfc.comcastbusiness.net [50.251.239.81]) by mail3.candelatech.com (Postfix) with ESMTP id BDCF113C2B3; Thu, 22 Jul 2021 13:28:39 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 mail3.candelatech.com BDCF113C2B3 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=candelatech.com; s=default; t=1626985719; bh=9KKPZ6s3GCWcEHfupZyr9LoRQZBFKS/9ODda1ZddgQc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q3IRUGqHsCL/nWQgpL3w23wr5LcBQTjdLlMIRzOnioKAtSZ8aCDAUSIlm3+D8i23Y XdJ4PwuR9Zob2vv3/XUWQOwIdhXTBO2ZOO31cNlENa7pQuMQPes9rOSLFI7Ig4pHoT Xrg+QZ8ife163IGoW/goAknjNh+kvuQ5HBXTA2Y0= From: greearb@candelatech.com To: linux-wireless@vger.kernel.org Cc: Ben Greear Subject: [PATCH v2 02/11] mt76 - mt7915: Fix potential NPE in TXS processing. Date: Thu, 22 Jul 2021 13:28:25 -0700 Message-Id: <20210722202834.6826-2-greearb@candelatech.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210722202834.6826-1-greearb@candelatech.com> References: <20210722202834.6826-1-greearb@candelatech.com> MIME-Version: 1.0 X-MDID: 1626985720-aAIC5e-WkYiN Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Ben Greear If skb is null, then don't try to dereference it. Signed-off-by: Ben Greear --- drivers/net/wireless/mediatek/mt76/mt7915/mac.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c index 555a2f94d069..fb88332f19ef 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c @@ -1321,7 +1321,7 @@ mt7915_mac_add_txs_skb(struct mt7915_dev *dev, struct mt76_wcid *wcid, int pid, /* TODO: Gather stats anyway, even if we are not matching on an skb. */ if (!skb) - goto out; + goto out_no_skb; txs = le32_to_cpu(txs_data[0]); txs5 = le32_to_cpu(txs_data[5]); @@ -1427,6 +1427,8 @@ mt7915_mac_add_txs_skb(struct mt7915_dev *dev, struct mt76_wcid *wcid, int pid, out: mt76_tx_status_skb_done(mdev, skb, &list, wcid); + +out_no_skb: mt76_tx_status_unlock(mdev, &list); return !!skb;