From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:53237 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965251AbcIEQ41 (ORCPT ); Mon, 5 Sep 2016 12:56:27 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alexey Khoroshilov , Johan Hovold Subject: [PATCH 4.4 098/113] USB: serial: mos7840: fix non-atomic allocation in write path Date: Mon, 5 Sep 2016 18:45:01 +0200 Message-Id: <20160905164353.349662465@linuxfoundation.org> In-Reply-To: <20160905164349.217621339@linuxfoundation.org> References: <20160905164349.217621339@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alexey Khoroshilov commit 3b7c7e52efda0d4640060de747768360ba70a7c0 upstream. There is an allocation with GFP_KERNEL flag in mos7840_write(), while it may be called from interrupt context. Follow-up for commit 191252837626 ("USB: kobil_sct: fix non-atomic allocation in write path") Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/mos7840.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/usb/serial/mos7840.c +++ b/drivers/usb/serial/mos7840.c @@ -1340,8 +1340,8 @@ static int mos7840_write(struct tty_stru } if (urb->transfer_buffer == NULL) { - urb->transfer_buffer = - kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); + urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, + GFP_ATOMIC); if (!urb->transfer_buffer) goto exit; }