From: "mika.westerberg@linux.intel.com" <mika.westerberg@linux.intel.com>
To: Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au>
Cc: Bjorn Helgaas <helgaas@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>
Subject: Re: Linux v5.5 serious PCI bug
Date: Mon, 9 Dec 2019 15:12:39 +0200 [thread overview]
Message-ID: <20191209131239.GP2665@lahna.fi.intel.com> (raw)
In-Reply-To: <PSXP216MB0438BFEAA0617283A834E11580580@PSXP216MB0438.KORP216.PROD.OUTLOOK.COM>
On Mon, Dec 09, 2019 at 12:34:04PM +0000, Nicholas Johnson wrote:
> Hi,
>
> I have compiled Linux v5.5-rc1 and thought all was good until I
> hot-removed a Gigabyte Aorus eGPU from Thunderbolt. The driver for the
> GPU was not loaded (blacklisted) so the crash is nothing to do with the
> GPU driver.
>
> We had:
> - kernel NULL pointer dereference
> - refcount_t: underflow; use-after-free.
>
> Attaching dmesg for now; will bisect and come back with results.
Looks like something related to iommu. Does it work if you disable it?
(intel_iommu=off in the command line).
next prev parent reply other threads:[~2019-12-09 13:12 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-09 12:34 Linux v5.5 serious PCI bug Nicholas Johnson
2019-12-09 12:37 ` Pavel Machek
2019-12-09 13:07 ` Nicholas Johnson
2019-12-09 13:12 ` mika.westerberg [this message]
2019-12-09 13:29 ` Nicholas Johnson
2019-12-09 13:33 ` Nicholas Johnson
2019-12-10 7:28 ` mika.westerberg
2019-12-10 12:00 ` Nicholas Johnson
2019-12-10 12:29 ` Lukas Wunner
2019-12-10 12:46 ` Takashi Iwai
2019-12-11 7:33 ` Jiasen Lin
2019-12-10 12:52 ` Nicholas Johnson
2019-12-10 12:34 ` mika.westerberg
2019-12-10 13:39 ` [PATCH] ALSA: hda/hdmi - Fix duplicate unref of pci_dev Lukas Wunner
2019-12-10 13:41 ` Takashi Iwai
2019-12-10 13:47 ` Nicholas Johnson
2019-12-10 13:50 ` Takashi Iwai
2019-12-10 15:34 ` Deucher, Alexander
2019-12-10 15:46 ` Lukas Wunner
2019-12-10 15:53 ` Deucher, Alexander
2019-12-10 16:10 ` Takashi Iwai
2019-12-10 16:51 ` Deucher, Alexander
2019-12-10 16:13 ` Lukas Wunner
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