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 6CA05C7EE21 for ; Thu, 4 May 2023 19:53:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231540AbjEDTw7 (ORCPT ); Thu, 4 May 2023 15:52:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58146 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231222AbjEDTv5 (ORCPT ); Thu, 4 May 2023 15:51:57 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7869F11B49; Thu, 4 May 2023 12:47:09 -0700 (PDT) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 88620637A1; Thu, 4 May 2023 19:46:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6D910C433A4; Thu, 4 May 2023 19:46:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1683229565; bh=xU5+GS7Z0ZOvuzry9gq4roNZWabzqWYxzl3qKvzYpew=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XwXn1xyjBbrzpWZzkeqWrU1e2NtZ2DUlZ1nB/aWbgt7AAlow9IHC8y28Vnt6H1Vuw jEZbHKxZcyIB8hgEqqTxZhR67LSEqo2yYoWHg72/iBd4MQumYyhhtOsLKYTj0OIS/D yj7lq2919LtCuLQ28uU4vJMxNXBIVMtw4KqWcORwpABCK2sQfHio1Neu8aN5rBH9/h EtEBPpqgi14Iouk05ME4pBZaePPsB7DX/Wo3BGatMhaUdO3+bS1KiKMLYmi9ZYOWn+ U+cUCT9mN3SFLAvJDgJGgprlrVx/m8VuxovWicziEv3BIPfBb27GN6gFsnBBd8OAOu zTiDEc5k0aG9A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Larry Finger , Sascha Hauer , Ping-Ke Shih , Kalle Valo , Sasha Levin , tony0620emma@gmail.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 6.2 41/53] wifi: rtw88: Fix memory leak in rtw88_usb Date: Thu, 4 May 2023 15:44:01 -0400 Message-Id: <20230504194413.3806354-41-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230504194413.3806354-1-sashal@kernel.org> References: <20230504194413.3806354-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Larry Finger [ Upstream commit 59a3a312009723e3e5082899655fdcc420e2b47a ] Kmemleak shows the following leak arising from routine in the usb probe routine: unreferenced object 0xffff895cb29bba00 (size 512): comm "(udev-worker)", pid 534, jiffies 4294903932 (age 102751.088s) hex dump (first 32 bytes): 77 30 30 30 00 00 00 00 02 2f 2d 2b 30 00 00 00 w000...../-+0... 02 00 2a 28 00 00 00 00 ff 55 ff ff ff 00 00 00 ..*(.....U...... backtrace: [] kmalloc_trace+0x26/0x90 [] rtw_usb_probe+0x2f1/0x680 [rtw_usb] [] usb_probe_interface+0xdd/0x2e0 [usbcore] [] really_probe+0x18e/0x3d0 [] __driver_probe_device+0x78/0x160 [] driver_probe_device+0x1f/0x90 [] __driver_attach+0xbf/0x1b0 [] bus_for_each_dev+0x70/0xc0 [] bus_add_driver+0x10e/0x210 [] driver_register+0x55/0xf0 [] usb_register_driver+0x88/0x140 [usbcore] [] do_one_initcall+0x43/0x210 [] do_init_module+0x4a/0x200 [] __do_sys_finit_module+0xac/0x120 [] do_syscall_64+0x56/0x80 [] entry_SYSCALL_64_after_hwframe+0x46/0xb0 The leak was verified to be real by unloading the driver, which resulted in a dangling pointer to the allocation. The allocated memory is freed in rtw_usb_intf_deinit(). Signed-off-by: Larry Finger Cc: Sascha Hauer Cc: Ping-Ke Shih Reviewed-by: Ping-Ke Shih Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20230417160331.23071-1-Larry.Finger@lwfinger.net Signed-off-by: Sasha Levin --- drivers/net/wireless/realtek/rtw88/usb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/realtek/rtw88/usb.c b/drivers/net/wireless/realtek/rtw88/usb.c index 68e1b782d1992..05c7326443614 100644 --- a/drivers/net/wireless/realtek/rtw88/usb.c +++ b/drivers/net/wireless/realtek/rtw88/usb.c @@ -780,6 +780,7 @@ static void rtw_usb_intf_deinit(struct rtw_dev *rtwdev, struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); usb_put_dev(rtwusb->udev); + kfree(rtwusb->usb_data); usb_set_intfdata(intf, NULL); } -- 2.39.2