From patchwork Mon Dec 28 12:45:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 353652 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, 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 DBC74C4332E for ; Mon, 28 Dec 2020 14:13:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A2CA6224D2 for ; Mon, 28 Dec 2020 14:13:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2440213AbgL1ONf (ORCPT ); Mon, 28 Dec 2020 09:13:35 -0500 Received: from mail.kernel.org ([198.145.29.99]:47362 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2440209AbgL1ONe (ORCPT ); Mon, 28 Dec 2020 09:13:34 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id EA8BD205CB; Mon, 28 Dec 2020 14:13:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609164799; bh=zzuJMY+o0rZHf9ldOzV0e4o8kbV+3YZQxBj4RWsQ82g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UFvWvzN0vke9UUs1TibiJeMn+TVnJaXRg/zMFbQe9Ki0lVWlvft5DZfb3yiLQgSPp nfNq1XVPYkNEG6EZjime8o+eVhdXTV0UqZxCy4mY4qHtEJBP1SROR2zmsm2olUyMkb yrY+X5keTBT66JrZdQL9g/avva3wPLLGBNWJCZkE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lorenzo Bianconi , Felix Fietkau , Sasha Levin Subject: [PATCH 5.10 302/717] mt76: mt7663s: fix a possible ple quota underflow Date: Mon, 28 Dec 2020 13:45:00 +0100 Message-Id: <20201228125035.496787170@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201228125020.963311703@linuxfoundation.org> References: <20201228125020.963311703@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Lorenzo Bianconi [ Upstream commit 1c79a190e94325e01811f653f770a34e816fdd8f ] Properly account current consumed ple quota in mt7663s_tx_pick_quota routine and avoid possible underflow. Fixes: 6ef2d665f64d ("mt76: mt7663s: split mt7663s_tx_update_sched in mt7663s_tx_{pick,update}_quota") Signed-off-by: Lorenzo Bianconi Signed-off-by: Felix Fietkau Signed-off-by: Sasha Levin --- drivers/net/wireless/mediatek/mt76/mt7615/sdio_txrx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/sdio_txrx.c b/drivers/net/wireless/mediatek/mt76/mt7615/sdio_txrx.c index 2486cda3243bc..69e38f477b1e4 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/sdio_txrx.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/sdio_txrx.c @@ -150,7 +150,7 @@ static int mt7663s_tx_pick_quota(struct mt76_sdio *sdio, enum mt76_txq_id qid, return -EBUSY; } else { if (sdio->sched.pse_data_quota < *pse_size + pse_sz || - sdio->sched.ple_data_quota < *ple_size) + sdio->sched.ple_data_quota < *ple_size + 1) return -EBUSY; *ple_size = *ple_size + 1;