Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 7420F443E44; Mon, 17 Aug 2026 14:36:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786977404; cv=none; b=iXsf4vEppuxQdYZS3U5AyAqLMUWUfAtaBODC8zhGCgdbMa52XpXJBnFTuys/rDSlH7AG514SrPvkrLdmMC1tWOQ+tzp7stOY6KZ9gVniVx4jGMFSCP4Z1SBXXerEP4+aZbtju8z8QStGHDjRJ8Z7ZimAwFYpzmY1QLzLvXB7X+E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786977404; c=relaxed/simple; bh=mpjBHEEuZO0GIRVBytYbxgRx83V8ZgKVe1JLlHqpnyk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eWLt73/9vwXUU1HNfD+x2AlMydLINEYMeHkQeiqXMdbaHQtZHt1SqA8PmFJyqBmdYEEqqHGWKLG+kbFQl1XsfPWj7H6kSfpHen9L8S0QenabgPwj9GfTwU4FqKVutog5Q/mAwDCZmMLJQcYYG87SBL4S9XmtKx0NArrXRms4Tek= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=xi3CLD/1; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="xi3CLD/1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CB9121F000E9; Mon, 17 Aug 2026 14:36:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786977403; bh=95y7oIcHCvWbwNsDwrds1xfBL5Es8d8YJgvETaZX8WA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=xi3CLD/1R/17nqa+h2ZNOAMyjL40j7qbWyAFpcJGoSO5Qa5SdseCMzGyCJ42peYOX fRk/LUngoE/TsDdWrW+MK9Lm8+t3X2n2zj48qReOUptw6eG64WPO2eLaJa5xSlUdzx 1F9y0jgaqQxJfxz0XTiOZR/SGntroqwBbG24n/YA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chenguang Zhao , Vadim Fedorenko , Zhu Yanjun , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.15 267/456] forcedeth: fix UAF of txrx_stats in nv_remove Date: Mon, 17 Aug 2026 15:30:57 +0200 Message-ID: <20260817132550.438144928@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260817132539.792407575@linuxfoundation.org> References: <20260817132539.792407575@linuxfoundation.org> User-Agent: quilt/0.69 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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chenguang Zhao [ Upstream commit 22666ba1420164753d7b0f5a841986b25ace5435 ] nv_remove() frees the per-CPU txrx_stats before unregister_netdev(). Until unregister completes, ndo_get_stats64, the NAPI/xmit data path, and nv_close()/drain may still access txrx_stats, leading to a use-after-free. Free the stats only after unregister_netdev(). Fixes: f4b633b911fd ("forcedeth: use per cpu to collect xmit/recv statistics") Signed-off-by: Chenguang Zhao Reviewed-by: Vadim Fedorenko Reviewed-by: Zhu Yanjun Link: https://patch.msgid.link/20260723092637.2135095-1-chenguang.zhao@linux.dev Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/nvidia/forcedeth.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c index e7be0710220e5..dcde28af8a0dc 100644 --- a/drivers/net/ethernet/nvidia/forcedeth.c +++ b/drivers/net/ethernet/nvidia/forcedeth.c @@ -6190,10 +6190,10 @@ static void nv_remove(struct pci_dev *pci_dev) struct net_device *dev = pci_get_drvdata(pci_dev); struct fe_priv *np = netdev_priv(dev); - free_percpu(np->txrx_stats); - unregister_netdev(dev); + free_percpu(np->txrx_stats); + nv_restore_mac_addr(pci_dev); /* restore any phy related changes */ -- 2.53.0