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 3EE7CA94D for ; Mon, 28 Aug 2023 10:20:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B3A1CC433C9; Mon, 28 Aug 2023 10:20:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1693218049; bh=CGr4istvhSNeofqGbgvpYxzFDFrt3FgjOSSaTuTsox0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=K8mrPp+MDy57U4mGm0PAyYPatMQBLTolbmyA563vVf8sziAgrDOTmWzGUS9Dcyihe pdDB2/clYJsbcGxK7aDAor0lBuQIgWZBYc0qVILG/qFrh+c6arQbPJmgV4ynPNM5sQ 0bj38QEqdwwID3MB9zAqMNB/NhDGR6hVFY2tuh8Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Daniel Golle , Simon Horman , Lorenzo Bianconi , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.4 037/129] net: ethernet: mtk_eth_soc: fix NULL pointer on hw reset Date: Mon, 28 Aug 2023 12:11:56 +0200 Message-ID: <20230828101158.614649277@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230828101157.383363777@linuxfoundation.org> References: <20230828101157.383363777@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Daniel Golle [ Upstream commit 604204fcb321abe81238551936ecda5269e81076 ] When a hardware reset is triggered on devices not initializing WED the calls to mtk_wed_fe_reset and mtk_wed_fe_reset_complete dereference a pointer on uninitialized stack memory. Break out of both functions in case a hw_list entry is 0. Fixes: 08a764a7c51b ("net: ethernet: mtk_wed: add reset/reset_complete callbacks") Signed-off-by: Daniel Golle Reviewed-by: Simon Horman Acked-by: Lorenzo Bianconi Link: https://lore.kernel.org/r/5465c1609b464cc7407ae1530c40821dcdf9d3e6.1692634266.git.daniel@makrotopia.org Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/mediatek/mtk_wed.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c index 985cff910f30c..3b651efcc25e1 100644 --- a/drivers/net/ethernet/mediatek/mtk_wed.c +++ b/drivers/net/ethernet/mediatek/mtk_wed.c @@ -221,9 +221,13 @@ void mtk_wed_fe_reset(void) for (i = 0; i < ARRAY_SIZE(hw_list); i++) { struct mtk_wed_hw *hw = hw_list[i]; - struct mtk_wed_device *dev = hw->wed_dev; + struct mtk_wed_device *dev; int err; + if (!hw) + break; + + dev = hw->wed_dev; if (!dev || !dev->wlan.reset) continue; @@ -244,8 +248,12 @@ void mtk_wed_fe_reset_complete(void) for (i = 0; i < ARRAY_SIZE(hw_list); i++) { struct mtk_wed_hw *hw = hw_list[i]; - struct mtk_wed_device *dev = hw->wed_dev; + struct mtk_wed_device *dev; + + if (!hw) + break; + dev = hw->wed_dev; if (!dev || !dev->wlan.reset_complete) continue; -- 2.40.1