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 X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 D4383C433DB for ; Tue, 5 Jan 2021 09:32:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 913B720756 for ; Tue, 5 Jan 2021 09:31:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728220AbhAEJ3S (ORCPT ); Tue, 5 Jan 2021 04:29:18 -0500 Received: from mail.kernel.org ([198.145.29.99]:49236 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728212AbhAEJ3Q (ORCPT ); Tue, 5 Jan 2021 04:29:16 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id A09C6229C4; Tue, 5 Jan 2021 09:28:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609838892; bh=Z5+aEPD2YmCXh7S722110kVIqhHKgKGlfjk88M+58vY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g0201ApwxDLfGNpzQXjF2dNavidfnj3GKQHGXKznqB+ndRVdDzDiEqXzdRsvt0Fzj 9dwCL3bB4oZlnMKJCeBZpaK0R2avXh2MnugmIzwo8YCvtFTR19P9n4KflY8F/3lhSK 9WwPs/2s8wzqrOXZGaLztCJk3XgaIXfeN64+y58A= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+6ce141c55b2f7aafd1c4@syzkaller.appspotmail.com, Anant Thazhemadam , Marcel Holtmann Subject: [PATCH 4.19 15/29] Bluetooth: hci_h5: close serdev device and free hu in h5_close Date: Tue, 5 Jan 2021 10:29:01 +0100 Message-Id: <20210105090820.508449624@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210105090818.518271884@linuxfoundation.org> References: <20210105090818.518271884@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: stable@vger.kernel.org From: Anant Thazhemadam commit 70f259a3f4276b71db365b1d6ff1eab805ea6ec3 upstream. When h5_close() gets called, the memory allocated for the hu gets freed only if hu->serdev doesn't exist. This leads to a memory leak. So when h5_close() is requested, close the serdev device instance and free the memory allocated to the hu entirely instead. Fixes: https://syzkaller.appspot.com/bug?extid=6ce141c55b2f7aafd1c4 Reported-by: syzbot+6ce141c55b2f7aafd1c4@syzkaller.appspotmail.com Tested-by: syzbot+6ce141c55b2f7aafd1c4@syzkaller.appspotmail.com Signed-off-by: Anant Thazhemadam Signed-off-by: Marcel Holtmann Signed-off-by: Greg Kroah-Hartman --- drivers/bluetooth/hci_h5.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/drivers/bluetooth/hci_h5.c +++ b/drivers/bluetooth/hci_h5.c @@ -263,8 +263,12 @@ static int h5_close(struct hci_uart *hu) if (h5->vnd && h5->vnd->close) h5->vnd->close(h5); - if (!hu->serdev) - kfree(h5); + if (hu->serdev) + serdev_device_close(hu->serdev); + + kfree_skb(h5->rx_skb); + kfree(h5); + h5 = NULL; return 0; }