From patchwork Mon Aug 2 15:16:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Greear X-Patchwork-Id: 12414217 X-Patchwork-Delegate: nbd@nbd.name 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=-18.7 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 D7D6FC4320A for ; Mon, 2 Aug 2021 15:16:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B7AD660FD8 for ; Mon, 2 Aug 2021 15:16:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234972AbhHBPRG (ORCPT ); Mon, 2 Aug 2021 11:17:06 -0400 Received: from dispatch1-us1.ppe-hosted.com ([148.163.129.52]:56188 "EHLO dispatch1-us1.ppe-hosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234750AbhHBPRF (ORCPT ); Mon, 2 Aug 2021 11:17:05 -0400 X-Virus-Scanned: Proofpoint Essentials engine Received: from mx1-us1.ppe-hosted.com (unknown [10.7.65.202]) by mx1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTPS id 7AF441C0077 for ; Mon, 2 Aug 2021 15:16:54 +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 5941180089 for ; Mon, 2 Aug 2021 15:16:54 +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 EE99213C2B3; Mon, 2 Aug 2021 08:16:53 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 mail3.candelatech.com EE99213C2B3 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=candelatech.com; s=default; t=1627917414; bh=z3cqtBWOsuKPpBhC7NiveH0ejIQBP9y+NWL0MUedHrY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cVxN8+6zylEJ0C8FLEJl0cXoztI7qD/5oaVr+ZhyUV3MyPayVjS/MaHVfFoXGwvOT Fx/yqzc2r9UhBpO7nIQKf1qd29FwI2T3nZpncQmqucyG0wArDZz3GZ0RqvVLHOqrSB ZhHAvZBZOCJOG/KI7lahd5AWEkJ+uyeGzkaGoE+w= From: greearb@candelatech.com To: linux-wireless@vger.kernel.org Cc: Ben Greear Subject: [PATCH v4 02/11] mt76: mt7915: fix potential NPE in TXS processing Date: Mon, 2 Aug 2021 08:16:34 -0700 Message-Id: <20210802151643.32394-2-greearb@candelatech.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210802151643.32394-1-greearb@candelatech.com> References: <20210802151643.32394-1-greearb@candelatech.com> MIME-Version: 1.0 X-MDID: 1627917415-AorLTaW3rYyq 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 35e4b57bd133..3f4e19358d5b 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]); @@ -1434,6 +1434,8 @@ 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;