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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AB03AC4332F for ; Mon, 14 Nov 2022 13:44:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=vwRZ6YNIaqZaRPENmb/JNTTFCvVb3fKuEs7ZArthLEQ=; b=XovAST8g16N8ia affu87rK6EXzLlzlVlzRxpT3YbrsNnZs+DoRlnHUBI0Si8JsMoSvUWqQSUdsqm7fsLlWvlcXVjnI9 Eu32yVSAc3AmUDdELqXn4sCypLyaNuO0Dngfcrfj3BNyfNO6hv8qZSujM0ZuUysbJiNmTVuXP7riI PgdrkHwkkUq6+WVfu5X6OSv0XxkNPnrWXnTvp+WyrNUGIFRoqhm1uT6H7HzZLphCWlassE5EvfMog ZLjjZLbKPAmWxDg0HNmeztLKcx4orrADTuKUKYVCYD/hmlXQUSRTQWXEgyy3mq7M4bw+HIJs0R0Zt VDIvaWbpQtCNknriQdCg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ouZjv-001LZd-Qr; Mon, 14 Nov 2022 13:43:08 +0000 Received: from szxga03-in.huawei.com ([45.249.212.189]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ouZhK-001Jkn-IS for linux-arm-kernel@lists.infradead.org; Mon, 14 Nov 2022 13:40:28 +0000 Received: from kwepemi500016.china.huawei.com (unknown [172.30.72.57]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4N9r2j66yjzJnjJ; Mon, 14 Nov 2022 21:37:17 +0800 (CST) Received: from huawei.com (10.175.100.227) by kwepemi500016.china.huawei.com (7.221.188.220) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Mon, 14 Nov 2022 21:40:23 +0800 From: Shang XiaoJing To: , , , , , , , , , , , , , CC: Subject: [PATCH 1/2] net: lan966x: Fix potential null-ptr-deref in lan966x_stats_init() Date: Mon, 14 Nov 2022 21:38:52 +0800 Message-ID: <20221114133853.5384-2-shangxiaojing@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20221114133853.5384-1-shangxiaojing@huawei.com> References: <20221114133853.5384-1-shangxiaojing@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.100.227] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemi500016.china.huawei.com (7.221.188.220) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221114_054026_828808_DCD94141 X-CRM114-Status: UNSURE ( 7.73 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org lan966x_stats_init() calls create_singlethread_workqueue() and not checked the ret value, which may return NULL. And a null-ptr-deref may happen: lan966x_stats_init() create_singlethread_workqueue() # failed, lan966x->stats_queue is NULL queue_delayed_work() queue_delayed_work_on() __queue_delayed_work() # warning here, but continue __queue_work() # access wq->flags, null-ptr-deref Check the ret value and return -ENOMEM if it is NULL. Fixes: 12c2d0a5b8e2 ("net: lan966x: add ethtool configuration and statistics") Signed-off-by: Shang XiaoJing --- drivers/net/ethernet/microchip/lan966x/lan966x_ethtool.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_ethtool.c b/drivers/net/ethernet/microchip/lan966x/lan966x_ethtool.c index e58a27fd8b50..0fb0efc224be 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_ethtool.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_ethtool.c @@ -708,6 +708,9 @@ int lan966x_stats_init(struct lan966x *lan966x) snprintf(queue_name, sizeof(queue_name), "%s-stats", dev_name(lan966x->dev)); lan966x->stats_queue = create_singlethread_workqueue(queue_name); + if (!lan966x->stats_queue) + return -ENOMEM; + INIT_DELAYED_WORK(&lan966x->stats_work, lan966x_check_stats_work); queue_delayed_work(lan966x->stats_queue, &lan966x->stats_work, LAN966X_STATS_CHECK_DELAY); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel