From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out5-smtp.messagingengine.com ([66.111.4.29]:41757 "EHLO out5-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752472AbcGYAOm (ORCPT ); Sun, 24 Jul 2016 20:14:42 -0400 Subject: FAILED: patch "[PATCH] ALSA: hda - fix use-after-free after module unload" failed to apply to 3.14-stable tree To: peter@lekensteyn.nl, stable@vger.kernel.org, tiwai@suse.de Cc: From: Date: Sun, 24 Jul 2016 17:14:57 -0700 Message-ID: <146940569761168@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: The patch below does not apply to the 3.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >>From ab58d8cc870ef3f0771c197700441936898d1f1d Mon Sep 17 00:00:00 2001 From: Peter Wu Date: Mon, 11 Jul 2016 19:51:06 +0200 Subject: [PATCH] ALSA: hda - fix use-after-free after module unload register_vga_switcheroo() sets the PM ops from the hda structure which is freed later in azx_free. Make sure that these ops are cleared. Caught by KASAN, initially noticed due to a general protection fault. Fixes: 246efa4a072f ("snd/hda: add runtime suspend/resume on optimus support (v4)") Signed-off-by: Peter Wu Cc: Signed-off-by: Takashi Iwai diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index e320c44714b1..7c9b06bf2896 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -1218,8 +1218,10 @@ static int azx_free(struct azx *chip) if (use_vga_switcheroo(hda)) { if (chip->disabled && hda->probe_continued) snd_hda_unlock_devices(&chip->bus); - if (hda->vga_switcheroo_registered) + if (hda->vga_switcheroo_registered) { vga_switcheroo_unregister_client(chip->pci); + vga_switcheroo_fini_domain_pm_ops(chip->card->dev); + } } if (bus->chip_init) {