Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752377AbcD1IJ0 (ORCPT ); Thu, 28 Apr 2016 04:09:26 -0400 Received: from mga01.intel.com ([192.55.52.88]:22186 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752287AbcD1IJT (ORCPT ); Thu, 28 Apr 2016 04:09:19 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,546,1455004800"; d="scan'208";a="968228150" Message-ID: <1461830953.3482.1.camel@linux.intel.com> Subject: Re: [PATCH] tpm: Fix IRQ unwind ordering in TIS From: Jarkko Sakkinen To: Jason Gunthorpe Cc: Stefan Berger , linux-security-module@vger.kernel.org, tpmdd-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org Date: Thu, 28 Apr 2016 11:09:13 +0300 In-Reply-To: <20160427165846.GA17064@obsidianresearch.com> References: <20160427165846.GA17064@obsidianresearch.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.18.5.2-0ubuntu1 Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1683 Lines: 43 On Wed, 2016-04-27 at 10:58 -0600, Jason Gunthorpe wrote: > The devm for the IRQ was placed on the chip, not the pdev. This can > cause the irq to be still callable after the pdev has been cleaned up > (eg priv kfree'd). >  > Found by CONFIG_DEBUG_SHIRQ=y >  > Reported-by: Stefan Berger > Fixes: 233a065e0cd0 ("tpm: Get rid of chip->pdev") > Signed-off-by: Jason Gunthorpe > Tested-by:  Stefan Berger Reviewed-by: Jarkko Sakkinen /Jarkko > --- >  drivers/char/tpm/tpm_tis.c | 4 ++-- >  1 file changed, 2 insertions(+), 2 deletions(-) >  > diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c > index a6b2d460bfc0..d88827046a42 100644 > --- a/drivers/char/tpm/tpm_tis.c > +++ b/drivers/char/tpm/tpm_tis.c > @@ -387,7 +387,7 @@ static void disable_interrupts(struct tpm_chip *chip) >   intmask &= ~TPM_GLOBAL_INT_ENABLE; >   iowrite32(intmask, >     priv->iobase + TPM_INT_ENABLE(priv->locality)); > - devm_free_irq(&chip->dev, priv->irq, chip); > + devm_free_irq(chip->dev.parent, priv->irq, chip); >   priv->irq = 0; >   chip->flags &= ~TPM_CHIP_FLAG_IRQ; >  } > @@ -604,7 +604,7 @@ static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 > intmask, >   struct priv_data *priv = dev_get_drvdata(&chip->dev); >   u8 original_int_vec; >   > - if (devm_request_irq(&chip->dev, irq, tis_int_handler, flags, > + if (devm_request_irq(chip->dev.parent, irq, tis_int_handler, flags, >        dev_name(&chip->dev), chip) != 0) { >   dev_info(&chip->dev, "Unable to request irq: %d for probe\n", >    irq);