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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD528C43334 for ; Tue, 5 Jul 2022 12:00:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232972AbiGEMAl (ORCPT ); Tue, 5 Jul 2022 08:00:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42522 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232759AbiGEMAO (ORCPT ); Tue, 5 Jul 2022 08:00:14 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B2FE317E34; Tue, 5 Jul 2022 05:00:11 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 2D317B817D4; Tue, 5 Jul 2022 12:00:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 958FEC341CD; Tue, 5 Jul 2022 12:00:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1657022408; bh=MDRErYeUWSJwKsBCQCGe+p0aMtjXUNffMWGsG7Pl+a8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o8cyUgyEuBD8O86NMNxSE5OiwAlsZgiDqWqCfm62axmP4KGxoOGxSRPCjs42ubQya f6pBbLeR/6oaDuFG0CtV65ItK0BV4XCYnugvLkbFfC5vOIwdctKmUFSQHx3V4HHQ9w 1YuJEf7ZOq9AYdOnJYWFChtJNXzHpLj7ka1rmgeU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Oliver Neukum , Jakub Kicinski Subject: [PATCH 4.9 06/29] usbnet: fix memory allocation in helpers Date: Tue, 5 Jul 2022 13:57:47 +0200 Message-Id: <20220705115605.933108860@linuxfoundation.org> X-Mailer: git-send-email 2.37.0 In-Reply-To: <20220705115605.742248854@linuxfoundation.org> References: <20220705115605.742248854@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: Oliver Neukum commit e65af5403e462ccd7dff6a045a886c64da598c2e upstream. usbnet provides some helper functions that are also used in the context of reset() operations. During a reset the other drivers on a device are unable to operate. As that can be block drivers, a driver for another interface cannot use paging in its memory allocations without risking a deadlock. Use GFP_NOIO in the helpers. Fixes: 877bd862f32b8 ("usbnet: introduce usbnet 3 command helpers") Signed-off-by: Oliver Neukum Link: https://lore.kernel.org/r/20220628093517.7469-1-oneukum@suse.com Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/usb/usbnet.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1952,7 +1952,7 @@ static int __usbnet_read_cmd(struct usbn cmd, reqtype, value, index, size); if (size) { - buf = kmalloc(size, GFP_KERNEL); + buf = kmalloc(size, GFP_NOIO); if (!buf) goto out; } @@ -1984,7 +1984,7 @@ static int __usbnet_write_cmd(struct usb cmd, reqtype, value, index, size); if (data) { - buf = kmemdup(data, size, GFP_KERNEL); + buf = kmemdup(data, size, GFP_NOIO); if (!buf) goto out; } else {