linux-kernel - [lkp] [iommu/vt] a13c8f27e4: DMAR-IR: Failed to enable irq remapping. You are vulnerable to irq-injection attacks.

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Date:	Mon, 02 Nov 2015 16:39:18 +0800
From:	kernel test robot <ying.huang@...ux.intel.com>
TO:	Baoquan He <bhe@...hat.com>
CC:	Joerg Roedel <jroedel@...e.de>
Subject: [lkp] [iommu/vt] a13c8f27e4: DMAR-IR: Failed to enable irq remapping. You are vulnerable to irq-injection attacks.

FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git x86/vt-d
commit a13c8f27e4d79420ae7bcb48123fa13851026428 ("iommu/vt-d: Adjust the return value of the parse_ioapics_under_ir")

We found the following new message in kernel log.

[    0.126325] DMAR-IR: Failed to enable irq remapping. You are vulnerable to irq-injection attacks.

To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml

Thanks,
Ying Huang

View attachment "config-4.3.0-rc3-00005-ga13c8f2" of type "text/plain" (141579 bytes)

Download attachment "kmsg.xz" of type "application/x-xz" (22476 bytes)

View attachment "job.yaml" of type "text/plain" (3212 bytes)

View attachment "reproduce" of type "text/plain" (1198 bytes)