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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0FF2BC43219 for ; Mon, 15 Nov 2021 18:17:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EBDE16349B for ; Mon, 15 Nov 2021 18:17:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240684AbhKOSQo (ORCPT ); Mon, 15 Nov 2021 13:16:44 -0500 Received: from mail.kernel.org ([198.145.29.99]:46734 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237863AbhKORai (ORCPT ); Mon, 15 Nov 2021 12:30:38 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 38D15632A3; Mon, 15 Nov 2021 17:20:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1636996820; bh=Ft5spIUE9njj7hiEe3Zznwr1C/bl1i6GG9RYr9kwZhA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kQ6oojrnH5MkmSSI3NvSM2N+LiWjp+clN3MI6EejHmTnp2D7i9OqT/8SDnS4uLMvj z3/40tRAyt+t74XRt2vVbMF+/1l4twkgNUgrRTsjBSN/w3ZMsNlmk5FUl/34RGN1M9 bpHlDKgrSiMQwzrFIp4dlHC35MEazSwLi0ECxgoQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hulk Robot , Wang Hai , Kalle Valo , Sasha Levin Subject: [PATCH 5.4 246/355] libertas: Fix possible memory leak in probe and disconnect Date: Mon, 15 Nov 2021 18:02:50 +0100 Message-Id: <20211115165321.699030741@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211115165313.549179499@linuxfoundation.org> References: <20211115165313.549179499@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: Wang Hai [ Upstream commit 9692151e2fe7a326bafe99836fd1f20a2cc3a049 ] I got memory leak as follows when doing fault injection test: unreferenced object 0xffff88812c7d7400 (size 512): comm "kworker/6:1", pid 176, jiffies 4295003332 (age 822.830s) hex dump (first 32 bytes): 00 68 1e 04 81 88 ff ff 01 00 00 00 00 00 00 00 .h.............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] slab_post_alloc_hook+0x9c/0x490 [] kmem_cache_alloc_trace+0x1f7/0x470 [] if_usb_probe+0x63/0x446 [usb8xxx] [] usb_probe_interface+0x1aa/0x3c0 [usbcore] [] really_probe+0x190/0x480 [] __driver_probe_device+0xf9/0x180 [] driver_probe_device+0x53/0x130 [] __device_attach_driver+0x105/0x130 [] bus_for_each_drv+0x129/0x190 [] __device_attach+0x1c9/0x270 [] device_initial_probe+0x20/0x30 [] bus_probe_device+0x142/0x160 [] device_add+0x829/0x1300 [] usb_set_configuration+0xb01/0xcc0 [usbcore] [] usb_generic_driver_probe+0x6e/0x90 [usbcore] [] usb_probe_device+0x6f/0x130 [usbcore] cardp is missing being freed in the error handling path of the probe and the path of the disconnect, which will cause memory leak. This patch adds the missing kfree(). Fixes: 876c9d3aeb98 ("[PATCH] Marvell Libertas 8388 802.11b/g USB driver") Reported-by: Hulk Robot Signed-off-by: Wang Hai Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20211020120345.2016045-3-wanghai38@huawei.com Signed-off-by: Sasha Levin --- drivers/net/wireless/marvell/libertas/if_usb.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireless/marvell/libertas/if_usb.c b/drivers/net/wireless/marvell/libertas/if_usb.c index 20436a289d5cd..5d6dc1dd050d4 100644 --- a/drivers/net/wireless/marvell/libertas/if_usb.c +++ b/drivers/net/wireless/marvell/libertas/if_usb.c @@ -292,6 +292,7 @@ err_add_card: if_usb_reset_device(cardp); dealloc: if_usb_free(cardp); + kfree(cardp); error: return r; @@ -316,6 +317,7 @@ static void if_usb_disconnect(struct usb_interface *intf) /* Unlink and free urb */ if_usb_free(cardp); + kfree(cardp); usb_set_intfdata(intf, NULL); usb_put_dev(interface_to_usbdev(intf)); -- 2.33.0