From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 028DD749A for ; Thu, 12 Jan 2023 14:10:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 46919C433EF; Thu, 12 Jan 2023 14:10:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673532649; bh=ggaHZDIhWgyy59i+LG7c5MJLm+sWHFU8wo0iCjr8F/4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mn2nV83AvcmBK3/mQ7kcD0sdkA/dMaOBEZoWGwTfQ3e7EXwmDg0n8KHIztHCRVDkt qXBFnJEh5YzW3CkgjBwsAO6QEjn/+id7vd2aEDf+xAGOzAHUvD+AhR/3DEZ/E6XSZS xqTvA3pZcwVceCYfu+DEY+G1xbWBDpAJr65pmmcA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Deren Wu , Felix Fietkau , Sasha Levin Subject: [PATCH 5.10 204/783] wifi: mt76: fix coverity overrun-call in mt76_get_txpower() Date: Thu, 12 Jan 2023 14:48:40 +0100 Message-Id: <20230112135533.796097528@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230112135524.143670746@linuxfoundation.org> References: <20230112135524.143670746@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Deren Wu [ Upstream commit 03dd0d49de7db680a856fa566963bb8421f46368 ] Make sure the nss is valid for nss_delta array. Return zero if the index is invalid. Coverity message: Event overrun-call: Overrunning callee's array of size 4 by passing argument "n_chains" (which evaluates to 15) in call to "mt76_tx_power_nss_delta". int delta = mt76_tx_power_nss_delta(n_chains); Fixes: 07cda406308b ("mt76: fix rounding issues on converting per-chain and combined txpower") Signed-off-by: Deren Wu Signed-off-by: Felix Fietkau Signed-off-by: Sasha Levin --- drivers/net/wireless/mediatek/mt76/mt76.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h index a5be66de1cff..5a8060790a61 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76.h +++ b/drivers/net/wireless/mediatek/mt76/mt76.h @@ -884,8 +884,9 @@ static inline bool mt76_is_skb_pktid(u8 pktid) static inline u8 mt76_tx_power_nss_delta(u8 nss) { static const u8 nss_delta[4] = { 0, 6, 9, 12 }; + u8 idx = nss - 1; - return nss_delta[nss - 1]; + return (idx < ARRAY_SIZE(nss_delta)) ? nss_delta[idx] : 0; } static inline bool mt76_testmode_enabled(struct mt76_dev *dev) -- 2.35.1