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IDProjectCategoryView StatusLast Update
0014819CentOS-7kmod-kvdopublic2018-05-31 06:55
ReporterTuxHandwerker 
PriorityurgentSeveritymajorReproducibilityalways
Status confirmedResolutionopen 
Platformx86_64OSCentOSOS Version7.4
Product Version7.5.1804 
Target VersionFixed in Version 
Summary0014819: The vdo kernel module looks like not signet correct.
DescriptionAn kernel error/warning is shown, because the vdo kernel module looks like not signet.

Because of missing vdo category, I put it under general.
Steps To ReproduceUse the vdo infrastructure that comes with 7.5
vdo status
Additional InformationKernel log:
[168395.362142] uds: loading out-of-tree module taints kernel.
[168395.362686] uds: module verification failed: signature and/or required key missing - tainting kernel
[168395.372627] uds: modprobe: loaded version 6.1.0.41
[168395.381378] kvdo: modprobe: loaded version 6.1.0.153

I think, on an EFI secure boot system, this will make vdo unusable, because the kernel refuse to load unsigned/wrong signet kernel modules.
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bgurney-rh

bgurney-rh

2018-05-30 20:53

reporter   ~0031965

I was about to file a similar bug, and I found this, so I'll add my information:

To reproduce, install CentOS from the minimal ISO, then run "yum groupinstall base". This will install the "kmod-kvdo" and "vdo" packages. Then run "modprobe kvdo".

Aside from the events in the kernel log mentioned above, the following lines will appear in /proc/modules:
kvdo 493161 0 - Live 0xffffffffc05cb000 (OE)
uds 274920 1 kvdo, Live 0xffffffffc0573000 (OE)

The following kernel taint flags appear:
"O": out-of-tree (this is expected, as kvdo and uds are built out-of-tree)
"E": unsigned module loaded in a kernel supporting module signature

Output of "modinfo kvdo":
filename: /lib/modules/3.10.0-862.el7.x86_64/weak-updates/kmod-kvdo/vdo/kvdo.ko
version: 6.1.0.168
license: GPL
author: Red Hat, Inc.
description: device-mapper target for transparent deduplication
retpoline: Y
rhelversion: 7.5
srcversion: B2308E3B1001CB1D9AED027
depends: uds,dm-mod
vermagic: 3.10.0-862.2.3.el7.x86_64 SMP mod_unload modversions

Output of "modinfo uds":
filename: /lib/modules/3.10.0-862.el7.x86_64/weak-updates/kmod-kvdo/uds/uds.ko
version: 6.1.0.43
license: GPL
author: Red Hat, Inc.
description: deduplication engine
retpoline: Y
rhelversion: 7.5
srcversion: E972A3C9A3F6D0EC6863501
depends:
vermagic: 3.10.0-862.2.3.el7.x86_64 SMP mod_unload modversions
toracat

toracat

2018-05-30 23:06

manager   ~0031966

I confirm the issue. Assigned to JohnnyHughes.

Also, a new category kmod-kvdo created.

Issue History

Date Modified Username Field Change
2018-05-16 11:35 TuxHandwerker New Issue
2018-05-30 20:53 bgurney-rh Note Added: 0031965
2018-05-30 23:00 toracat Status new => confirmed
2018-05-30 23:03 toracat Category general => kmod-kvdo
2018-05-30 23:06 toracat Note Added: 0031966