From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754997AbcCBLkl (ORCPT ); Wed, 2 Mar 2016 06:40:41 -0500 Received: from mail-pf0-f174.google.com ([209.85.192.174]:35439 "EHLO mail-pf0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753219AbcCBLkk (ORCPT ); Wed, 2 Mar 2016 06:40:40 -0500 From: Sudip Mukherjee To: Jaroslav Kysela , Takashi Iwai Cc: linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org, Sudip Mukherjee Subject: [PATCH] ALSA: portman2x4: fix NULL pointer dereference Date: Wed, 2 Mar 2016 17:10:30 +0530 Message-Id: <1456918830-2675-1-git-send-email-sudipm.mukherjee@gmail.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org While registering pardev, the irq_func was also registered. As a result when we tried to probe for the card, an interrupt was generated and in the ISR we tried to dereference private_data. But private_data is still NULL as we have not yet done portman_create(). Lets probe for the device after card is created. Fixes: e6a1b7e88046 ("ALSA: portman2x4 - use new parport device model") Signed-off-by: Sudip Mukherjee --- sound/drivers/portman2x4.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/sound/drivers/portman2x4.c b/sound/drivers/portman2x4.c index 362533f..189e3e7 100644 --- a/sound/drivers/portman2x4.c +++ b/sound/drivers/portman2x4.c @@ -762,11 +762,6 @@ static int snd_portman_probe(struct platform_device *pdev) err = -EIO; goto free_pardev; } - err = portman_probe(p); - if (err) { - err = -EIO; - goto release_pardev; - } if ((err = portman_create(card, pardev, &pm)) < 0) { snd_printd("Cannot create main component\n"); @@ -774,6 +769,12 @@ static int snd_portman_probe(struct platform_device *pdev) } card->private_data = pm; card->private_free = snd_portman_card_private_free; + + err = portman_probe(p); + if (err) { + err = -EIO; + goto __err; + } if ((err = snd_portman_rawmidi_create(card)) < 0) { snd_printd("Creating Rawmidi component failed\n"); -- 1.9.1