From patchwork Fri May 14 07:42:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongliang Mu X-Patchwork-Id: 439359 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51CF5C433B4 for ; Fri, 14 May 2021 07:43:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1F0C661406 for ; Fri, 14 May 2021 07:43:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233169AbhENHoO (ORCPT ); Fri, 14 May 2021 03:44:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45564 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230102AbhENHoN (ORCPT ); Fri, 14 May 2021 03:44:13 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA527C061574; Fri, 14 May 2021 00:43:02 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id b21so15845683plz.0; Fri, 14 May 2021 00:43:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=cHaPvQmto+Bhanxbj9NMPMs12GXkBO31FUth1AEaHek=; b=FrDgQLtER5/YdbTwCRCrwoevZ/VwPgEnAhp4jszaUaMmiakqXrEk+3n0S1gFLVMnnY tfe9P9fj8EbpXppRnuobTQnjDz7T3EIlTgFEx59/8VTIfRCWNGP86BA9iiH3FLXtDwRF S2yEnr2VsO1QA5IY+O3R7DwLRNuZRFYNEtpOXDsiH9zIFY1X1PsDo6OZHCC+agiwGCdu D3hJBbmIL7WelGrdRVlUITdFDk4LQUKG24WnOZ6dGFYaf6BVzrDEtnSDxBEML12oiLYS EKkaDHmE/lGfEl4Hg4wmmsgH18IjsowZEx7iRe6dO5X9vvT1LYcV6ZU90Vkse6a1vizv /4TQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=cHaPvQmto+Bhanxbj9NMPMs12GXkBO31FUth1AEaHek=; b=DIB2+nsUhvupFbo/jbp/diULFeE3DuSAsxtQ0Jx6EhR4QPRKhaykahtjuFsQhSxfhj tQXf11j5eFKv1uWPdE53ClMFFGy8SbeB5AOAKspq7OM0yJl19cRFruzCD1ChopB540Yb PyXgBLUQPs3kh93uD9tLWwM6z6AhYWobvGIM0wdTxb0BZMZi1K1sqMtxnZF0EtmOr3me tAG3jI2zGFxCHLsLy+osdSYhqpyC9QJssA1WiOneZW07XLkQwDbHHHHjCtY/EpvZDvba U8neuHiUIFCnUyZ5B3A2FwdMiQz5Ahlvzs/ZDj1K6afqBwngtv2iRrdbsGsynWjkbl9B 7jGg== X-Gm-Message-State: AOAM532aTfY67Sx3d0jqNiefIOe3Cq5H1qSF+FACCAzkNS4IyLxgxBM1 nY6l4VNGaspmBuZexo6elDH5YuSqk58Nr8YjoA9Ayw== X-Google-Smtp-Source: ABdhPJxV16yttVfW058Hp47noZTL/oMwnx9HrRTufQxH5EmjKT6Xrc5oUS+RKyNzCIldjH5gEdS+sw== X-Received: by 2002:a17:902:e84c:b029:ee:d129:3b1c with SMTP id t12-20020a170902e84cb02900eed1293b1cmr43573452plg.73.1620978182363; Fri, 14 May 2021 00:43:02 -0700 (PDT) Received: from localhost.localdomain ([45.135.186.84]) by smtp.gmail.com with ESMTPSA id n53sm122817pfv.67.2021.05.14.00.42.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 May 2021 00:43:01 -0700 (PDT) From: Dongliang Mu To: davem@davemloft.net, kuba@kernel.org, gregkh@linuxfoundation.org, bongsu.jeon@samsung.com, andrew@lunn.ch, wanghai38@huawei.com, zhengyongjun3@huawei.com, alexs@kernel.org Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Dongliang Mu , syzbot+19bcfc64a8df1318d1c3@syzkaller.appspotmail.com Subject: [PATCH] NFC: nci: fix memory leak in nci_allocate_device Date: Fri, 14 May 2021 15:42:48 +0800 Message-Id: <20210514074248.780647-1-mudongliangabcd@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org nfcmrvl_disconnect fails to free the hci_dev field in struct nci_dev. Fix this by freeing hci_dev in nci_free_device. BUG: memory leak unreferenced object 0xffff888111ea6800 (size 1024): comm "kworker/1:0", pid 19, jiffies 4294942308 (age 13.580s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 60 fd 0c 81 88 ff ff .........`...... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000004bc25d43>] kmalloc include/linux/slab.h:552 [inline] [<000000004bc25d43>] kzalloc include/linux/slab.h:682 [inline] [<000000004bc25d43>] nci_hci_allocate+0x21/0xd0 net/nfc/nci/hci.c:784 [<00000000c59cff92>] nci_allocate_device net/nfc/nci/core.c:1170 [inline] [<00000000c59cff92>] nci_allocate_device+0x10b/0x160 net/nfc/nci/core.c:1132 [<00000000006e0a8e>] nfcmrvl_nci_register_dev+0x10a/0x1c0 drivers/nfc/nfcmrvl/main.c:153 [<000000004da1b57e>] nfcmrvl_probe+0x223/0x290 drivers/nfc/nfcmrvl/usb.c:345 [<00000000d506aed9>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<00000000bc632c92>] really_probe+0x159/0x4a0 drivers/base/dd.c:554 [<00000000f5009125>] driver_probe_device+0x84/0x100 drivers/base/dd.c:740 [<000000000ce658ca>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:846 [<000000007067d05f>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431 [<00000000f8e13372>] __device_attach+0x122/0x250 drivers/base/dd.c:914 [<000000009cf68860>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491 [<00000000359c965a>] device_add+0x5be/0xc30 drivers/base/core.c:3109 [<00000000086e4bd3>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164 [<00000000ca036872>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<00000000d40d36f6>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<00000000bc632c92>] really_probe+0x159/0x4a0 drivers/base/dd.c:554 Reported-by: syzbot+19bcfc64a8df1318d1c3@syzkaller.appspotmail.com Signed-off-by: Dongliang Mu --- include/net/nfc/nci_core.h | 1 + net/nfc/nci/core.c | 1 + net/nfc/nci/hci.c | 5 +++++ 3 files changed, 7 insertions(+) diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h index bd76e8e082c0..aa2e0f169015 100644 --- a/include/net/nfc/nci_core.h +++ b/include/net/nfc/nci_core.h @@ -298,6 +298,7 @@ int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len, struct sk_buff **resp); struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev); +void nci_hci_allocate(struct nci_dev *ndev); int nci_hci_send_event(struct nci_dev *ndev, u8 gate, u8 event, const u8 *param, size_t param_len); int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate, diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c index 9a585332ea84..da7fe9db1b00 100644 --- a/net/nfc/nci/core.c +++ b/net/nfc/nci/core.c @@ -1191,6 +1191,7 @@ EXPORT_SYMBOL(nci_allocate_device); void nci_free_device(struct nci_dev *ndev) { nfc_free_device(ndev->nfc_dev); + nci_hci_deallocate(ndev); kfree(ndev); } EXPORT_SYMBOL(nci_free_device); diff --git a/net/nfc/nci/hci.c b/net/nfc/nci/hci.c index 6b275a387a92..96865142104f 100644 --- a/net/nfc/nci/hci.c +++ b/net/nfc/nci/hci.c @@ -792,3 +792,8 @@ struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev) return hdev; } + +void nci_hci_deallocate(struct nci_dev *ndev) +{ + kfree(ndev->hci_dev); +}