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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BD5BC35270 for ; Mon, 24 Jan 2022 22:48:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1838589AbiAXWqx (ORCPT ); Mon, 24 Jan 2022 17:46:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357688AbiAXVhM (ORCPT ); Mon, 24 Jan 2022 16:37:12 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45CEAC0BD118; Mon, 24 Jan 2022 12:23:12 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 0E354B81239; Mon, 24 Jan 2022 20:23:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 33AA5C340E5; Mon, 24 Jan 2022 20:23:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643055789; bh=I83jkJq/WrYb2koe1pfNdBN/QukfSOV9ISZf16cQILE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qldjHC7H8e3Y/CwUgeMJwRtScg3ZB4NPwfNx9da/Xm4abCLnQF5PAshqfJ/c1LxhS pPekF8YLqWxgbcOG8yu7bbLzGOgNsjx7hssic1tqEhLyEeEhpp26KRe+fDBrK08FTQ 9fWZ/UoDRYLJmeZkXFcoBmPUbcNLk+He/b83yW5M= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Claudiu Beznea , Kalle Valo , Sasha Levin Subject: [PATCH 5.15 267/846] wilc1000: fix double free error in probe() Date: Mon, 24 Jan 2022 19:36:24 +0100 Message-Id: <20220124184110.139459629@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184100.867127425@linuxfoundation.org> References: <20220124184100.867127425@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dan Carpenter [ Upstream commit 4894edacfa93d7046bec4fc61fc402ac6a2ac9e8 ] Smatch complains that there is a double free in probe: drivers/net/wireless/microchip/wilc1000/spi.c:186 wilc_bus_probe() error: double free of 'spi_priv' drivers/net/wireless/microchip/wilc1000/sdio.c:163 wilc_sdio_probe() error: double free of 'sdio_priv' The problem is that wilc_netdev_cleanup() function frees "wilc->bus_data". That's confusing and a layering violation. Leave the frees in probe(), delete the free in wilc_netdev_cleanup(), and add some new frees to the remove() functions. Fixes: dc8b338f3bcd ("wilc1000: use goto labels on error path") Signed-off-by: Dan Carpenter Reviewed-by: Claudiu Beznea Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20211217150311.GC16611@kili Signed-off-by: Sasha Levin --- drivers/net/wireless/microchip/wilc1000/netdev.c | 1 - drivers/net/wireless/microchip/wilc1000/sdio.c | 2 ++ drivers/net/wireless/microchip/wilc1000/spi.c | 2 ++ 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/microchip/wilc1000/netdev.c b/drivers/net/wireless/microchip/wilc1000/netdev.c index 7e4d9235251cb..9dfb1a285e6a4 100644 --- a/drivers/net/wireless/microchip/wilc1000/netdev.c +++ b/drivers/net/wireless/microchip/wilc1000/netdev.c @@ -901,7 +901,6 @@ void wilc_netdev_cleanup(struct wilc *wilc) wilc_wlan_cfg_deinit(wilc); wlan_deinit_locks(wilc); - kfree(wilc->bus_data); wiphy_unregister(wilc->wiphy); wiphy_free(wilc->wiphy); } diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c index 42e03a701ae16..8b3b735231085 100644 --- a/drivers/net/wireless/microchip/wilc1000/sdio.c +++ b/drivers/net/wireless/microchip/wilc1000/sdio.c @@ -167,9 +167,11 @@ free: static void wilc_sdio_remove(struct sdio_func *func) { struct wilc *wilc = sdio_get_drvdata(func); + struct wilc_sdio *sdio_priv = wilc->bus_data; clk_disable_unprepare(wilc->rtc_clk); wilc_netdev_cleanup(wilc); + kfree(sdio_priv); } static int wilc_sdio_reset(struct wilc *wilc) diff --git a/drivers/net/wireless/microchip/wilc1000/spi.c b/drivers/net/wireless/microchip/wilc1000/spi.c index dd481dc0b5ce0..c98c0999a6b67 100644 --- a/drivers/net/wireless/microchip/wilc1000/spi.c +++ b/drivers/net/wireless/microchip/wilc1000/spi.c @@ -182,9 +182,11 @@ free: static int wilc_bus_remove(struct spi_device *spi) { struct wilc *wilc = spi_get_drvdata(spi); + struct wilc_spi *spi_priv = wilc->bus_data; clk_disable_unprepare(wilc->rtc_clk); wilc_netdev_cleanup(wilc); + kfree(spi_priv); return 0; } -- 2.34.1