From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:39807 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751798AbcBNWYD (ORCPT ); Sun, 14 Feb 2016 17:24:03 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dmitry Vyukov , Takashi Iwai Subject: [PATCH 4.4 037/117] ALSA: rawmidi: Remove kernel WARNING for NULL user-space buffer check Date: Sun, 14 Feb 2016 14:21:14 -0800 Message-Id: <20160214222142.524177330@linuxfoundation.org> In-Reply-To: <20160214222141.393531627@linuxfoundation.org> References: <20160214222141.393531627@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: Takashi Iwai commit cc85f7a634cfaf9f0713c6aa06d08817424db37a upstream. NULL user-space buffer can be passed even in a normal path, thus it's not good to spew a kernel warning with stack trace at each time. Just drop snd_BUG_ON() macro usage there. BugLink: http://lkml.kernel.org/r/CACT4Y+YfVJ3L+q0i-4vyQVyyPD7V=OMX0PWPi29x9Bo3QaBLdw@mail.gmail.com Reported-by: Dmitry Vyukov Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/core/rawmidi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -1224,7 +1224,7 @@ static long snd_rawmidi_kernel_write1(st long count1, result; struct snd_rawmidi_runtime *runtime = substream->runtime; - if (snd_BUG_ON(!kernelbuf && !userbuf)) + if (!kernelbuf && !userbuf) return -EINVAL; if (snd_BUG_ON(!runtime->buffer)) return -EINVAL;