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=-18.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS 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 CCA18C433ED for ; Fri, 14 May 2021 11:26:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A626F61458 for ; Fri, 14 May 2021 11:26:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230130AbhENL1g (ORCPT ); Fri, 14 May 2021 07:27:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:56880 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229445AbhENL1g (ORCPT ); Fri, 14 May 2021 07:27:36 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B6C8D61457; Fri, 14 May 2021 11:26:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620991583; bh=sEJ2ZnGgka6AMHfswnCfQN5+yKHh6h8UbPzcqIBLCbM=; h=Subject:To:From:Date:From; b=jdB8sW0e0gKmbLe73Sf8T9xjYIGnsD1oILH5oSgWc/dlikewGjffy5rAodtJ8jOAt n9I7gCpo/BD9HU68jcFcZ6jaJ11pjwkOm4GLu2X6Zq0dq2TpAzQqdRFMOgL9dsAXkF 11e19TYzYEqsfalZQpVpbixcxcUA5qWPblooR41Q= Subject: patch "uio_hv_generic: Fix a memory leak in error handling paths" added to char-misc-linus To: christophe.jaillet@wanadoo.fr, gregkh@linuxfoundation.org, stable@vger.kernel.org From: Date: Fri, 14 May 2021 13:26:12 +0200 Message-ID: <1620991572133169@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org This is a note to let you know that I've just added the patch titled uio_hv_generic: Fix a memory leak in error handling paths to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From 3ee098f96b8b6c1a98f7f97915f8873164e6af9d Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Sun, 9 May 2021 09:13:03 +0200 Subject: uio_hv_generic: Fix a memory leak in error handling paths If 'vmbus_establish_gpadl()' fails, the (recv|send)_gpadl will not be updated and 'hv_uio_cleanup()' in the error handling path will not be able to free the corresponding buffer. In such a case, we need to free the buffer explicitly. Fixes: cdfa835c6e5e ("uio_hv_generic: defer opening vmbus until first use") Cc: stable Signed-off-by: Christophe JAILLET Link: https://lore.kernel.org/r/4fdaff557deef6f0475d02ba7922ddbaa1ab08a6.1620544055.git.christophe.jaillet@wanadoo.fr Signed-off-by: Greg Kroah-Hartman --- drivers/uio/uio_hv_generic.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c index 0330ba99730e..eebc399f2cc7 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -296,8 +296,10 @@ hv_uio_probe(struct hv_device *dev, ret = vmbus_establish_gpadl(channel, pdata->recv_buf, RECV_BUFFER_SIZE, &pdata->recv_gpadl); - if (ret) + if (ret) { + vfree(pdata->recv_buf); goto fail_close; + } /* put Global Physical Address Label in name */ snprintf(pdata->recv_name, sizeof(pdata->recv_name), @@ -316,8 +318,10 @@ hv_uio_probe(struct hv_device *dev, ret = vmbus_establish_gpadl(channel, pdata->send_buf, SEND_BUFFER_SIZE, &pdata->send_gpadl); - if (ret) + if (ret) { + vfree(pdata->send_buf); goto fail_close; + } snprintf(pdata->send_name, sizeof(pdata->send_name), "send:%u", pdata->send_gpadl); -- 2.31.1