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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 7299FC76186 for ; Mon, 29 Jul 2019 20:02:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 39EC5205F4 for ; Mon, 29 Jul 2019 20:02:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564430548; bh=2wxzt5JMsqqpQOcd2Ku1eTy6OT7lVsReh/kZknImlaw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Xp0NU7sCJCj/6JoSCxrV9TRfBOr5VVuz8vSgS7xrRz2P+cRQttuX7Ri2QO/WeZwDS +qpgyyXGijQN7606jJ5Z5YeVCbRuh51fbPWCI/6nJgaVD9YYxrea+LuC0T6MjTL7Wt f/B38myR9oKeZsK09dGKeYe2tZ4PobqxTdIJuteM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390142AbfG2Tsh (ORCPT ); Mon, 29 Jul 2019 15:48:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:38904 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390133AbfG2Tsh (ORCPT ); Mon, 29 Jul 2019 15:48:37 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 084032171F; Mon, 29 Jul 2019 19:48:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564429716; bh=2wxzt5JMsqqpQOcd2Ku1eTy6OT7lVsReh/kZknImlaw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k3tH/Stvj4Mz6yVvKbr0motY7fodWwi6u+FjW5SE1C0y75NAeCNhgy+fXciz+hKQx vui0Yb5Dvtn5dGsZUso4/kAJYiqa6t8GGN5fjKfjIcl4etWMqXAXM1mvVsW45OulMO qog1C6Qxy20fbLIsZ2urkQT4nhP3ryK9qxtgE/Ro= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andrzej Pietrasiewicz , Felipe Balbi , Sasha Levin Subject: [PATCH 5.2 070/215] usb: gadget: Zero ffs_io_data Date: Mon, 29 Jul 2019 21:21:06 +0200 Message-Id: <20190729190752.430092823@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190729190739.971253303@linuxfoundation.org> References: <20190729190739.971253303@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit 508595515f4bcfe36246e4a565cf280937aeaade ] In some cases the "Allocate & copy" block in ffs_epfile_io() is not executed. Consequently, in such a case ffs_alloc_buffer() is never called and struct ffs_io_data is not initialized properly. This in turn leads to problems when ffs_free_buffer() is called at the end of ffs_epfile_io(). This patch uses kzalloc() instead of kmalloc() in the aio case and memset() in non-aio case to properly initialize struct ffs_io_data. Signed-off-by: Andrzej Pietrasiewicz Signed-off-by: Felipe Balbi Signed-off-by: Sasha Levin --- drivers/usb/gadget/function/f_fs.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c index c7ed90084d1a..213ff03c8a9f 100644 --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c @@ -1183,11 +1183,12 @@ static ssize_t ffs_epfile_write_iter(struct kiocb *kiocb, struct iov_iter *from) ENTER(); if (!is_sync_kiocb(kiocb)) { - p = kmalloc(sizeof(io_data), GFP_KERNEL); + p = kzalloc(sizeof(io_data), GFP_KERNEL); if (unlikely(!p)) return -ENOMEM; p->aio = true; } else { + memset(p, 0, sizeof(*p)); p->aio = false; } @@ -1219,11 +1220,12 @@ static ssize_t ffs_epfile_read_iter(struct kiocb *kiocb, struct iov_iter *to) ENTER(); if (!is_sync_kiocb(kiocb)) { - p = kmalloc(sizeof(io_data), GFP_KERNEL); + p = kzalloc(sizeof(io_data), GFP_KERNEL); if (unlikely(!p)) return -ENOMEM; p->aio = true; } else { + memset(p, 0, sizeof(*p)); p->aio = false; } -- 2.20.1