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Cygon
Tux's lil' helper
Joined: 05 Feb 2006
Posts: 115
Location: Germany
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 Posted: Tue Oct 11, 2022 6:23 am Post subject: VirtualBox guest: vboxsf kernel module - unknown symbol |
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I installed a Gentoo system in VirtualBox (host is also Gentoo) and emerged the 'virtualbox-guest-additions' package which comes with an OpenRC init script (/etc/init.d/vitualbox-guest-additions) that loads a few modules.
| Code: | # /etc/init.d/virtualbox-guest-additions (except)
start_pre() {
einfo "Loading kernel modules"
/sbin/modprobe vboxguest 2>&1
/sbin/modprobe vboxsf 2>&1
} |
However, it fails with this message:
| Code: | * Loading kernel modules
modprobe: ERROR: could not insert 'vboxsf': No such device |
The module is there. If I manually attempt to load it, I get this:
| Code: | # insmod /lib/modules/5.15.69-gentoo/misc/vboxsf.ko
insmod: ERROR: could not insert module /lib/modules/5.15.69-gentoo/misc/vboxsf.ko: Unknown symbol in module |
Since this is a fresh VM, there only ever has been one kernel on it and the module was compiled with that kernel selected and running:
| Code: | # uname -a
Linux localhost 5.15.69-gentoo #2 SMP Mon Oct 10 17:01:26 -00 2022 x86_64 Intel(R) Xeon(R) CPU E5-2697A v4 @ 2.60GHz GenuineIntel GNU/Linux
# modinfo /lib/modules/5.15.69-gentoo/misc/vboxsf.ko
filename: /lib/modules/5.15.69-gentoo/misc/vboxsf.ko
version: 6.1.34_Gentoo r150636
alias: fs-vboxsf
license: GPL and additional rights
author: Oracle Corporation
description: Oracle VM VirtualBox VFS Module for Host File System Access
srcversion: 5CA88D7CFA73949DF6004A8
depends: vboxguest
retpoline: Y
name: vboxsf
vermagic: 5.15.69-gentoo SMP mod_unload
parm: follow_symlinks:Let host resolve symlinks rather than showing them (int) |
I suspect that the module needs some kernel option to be enabled that isn't checked for by the ebuild.
depmod --all does not report any missing symbols. Is there another way to find out what's missing or could the problem be an entirely different one? |
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Hu
Administrator
Joined: 06 Mar 2007
Posts: 23335
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| Posted: Tue Oct 11, 2022 12:23 pm Post subject: |
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| What does dmesg report after a failed load? The last 10-15 lines are likely sufficient. |
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Cygon
Tux's lil' helper
Joined: 05 Feb 2006
Posts: 115
Location: Germany
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| Posted: Tue Oct 11, 2022 1:44 pm Post subject: |
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These lines pop into dmesg when I try to load the driver:
| Code: | Service: Shared Clipboard
Service: Host Version Check
Service: Seamless
Service: Drag and Drop (DnD)
Service: Display SVGA X11
Worker loop running
VMWARE's ctrl extensions is availabale Major Opcode is 128
Found libXrandr 1.6
An X Window protocol error occurred: BadValue (integer parameter out of range for operation) (error code 2). Request code: 128
Resizing frame buffer to 981 725 has failed, current mode 800 600
RRScreenChangeNotify event received
Proxy window=60817409, root window=1294 ...
Started
6.1.34_Gentoor150636
An X Window protocol error occurred: BadValue (integer parameter out of range for operation) (error code 2). Request code: 128
RRScreenChangeNotify event received
Resizing frame buffer to 981 725 has failed, current mode 800 600
RRScreenChangeNotify event received
vboxguest: loading out-of-tree module taints kernel.
Error: Driver 'vboxguest' is already registered, aborting...
vboxguest: PCI device not found, probably running on physical hardware.
------------------ [ cut here ] -----------------------
Unexpected driver unregister! |
I noticed that I had enabled CONFIG_DRM_VBOXVIDEO=y and CONFIG_VBOXGUEST=y but not CONFIG_VBOXSF_FS in my kernel config, so the virtualbox guest and video drivers were built-in. Apparently, mixing the VirtualBox modules added into the kernel with the ones from the virtualbox-guest-additions package results in some weirdness.
So two more experiments:
- If I use only the VirtualBox modules built into the kernel, after resizing the VirtualBox window while KDE is running, all screen contents except for the mouse cursor disappears. I can still open the launcher (Alt+F2), so it's probably messed up geometry. Might be related to the "BadValue" lines in dmesg.
- If I instead disable my kernel's VirtualBox modules, virtualbox-guest-additions fails to build because DRM_TTM is not set (it's one of those symbols that's only enabled if something depends on it) - so I have to either enable an unrelated video driver or hand-delete the kernel module after building. I did the latter, then installed virtualbox-guest-additions. No change on the screen resizing/geometry issue - everything turns black and I can only move my mouse and launch programs via Alt+F2.
Using the xorg.conf suggested by virtualbox-guest-additions makes X11 unable to find a screen.
Well at least dmesg contains no complaints anymore 
| Code: | vboxguest: loading out-of-tree module taints kernel.
e1000 0000:00:03.0 enp0s3: renamed from eth0
vgdrvHeartbeatInit: Setting up heartbeat to trigger every 2000 milliseconds
input: Unspecified device as /devices/pci0000:00/0000:00:04.0/input/input6
vboxguest: Successfully loaded version 6.1.38_Gentoo r153438
vboxguest: misc device minor 125, IRQ 20, I/O port d020, MMIO at 00000000e8400000 (size 0x400000)
vboxguest: Successfully loaded version 6.1.38_Gentoo r153438 (interface 0x00010004)
EXT4-fs (sda2): re-mounted. Opts: (null). Quota mode: disabled.
random: ln: uninitialized urandom read (6 bytes read)
random: mktemp: uninitialized urandom read (10 bytes read)
random: crng init done
e1000: enp0s3 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
IPv6: ADDRCONF(NETDEV_CHANGE): enp0s3: link becomes ready
vboxsf: g_fHostFeatures=0x8000000f g_fSfFeatures=0x1 g_uSfLastFunction=29
vboxsf: Successfully loaded version 6.1.38_Gentoo r153438
vboxsf: Successfully loaded version 6.1.38_Gentoo r153438 on 5.15.69-gentoo (LINUX_VERSION_CODE=0x50f45)
vboxvideo: loading version 6.1.38_Gentoo r153438
13:32:29.873325 main VBoxService 6.1.38_Gentoo r153438 (verbosity: 0) linux.amd64 (Oct 11 2022 07:29:46) release log
13:32:29.873339 main Log opened 2022-10-11T13:32:29.873298000Z
13:32:29.873847 main OS Product: Linux
13:32:29.874043 main OS Release: 5.15.69-gentoo
13:32:29.874143 main OS Version: #7 SMP Tue Oct 11 07:17:41 MDT 2022
13:32:29.874239 main Executable: /usr/sbin/vboxguest-service
13:32:29.874247 main Process ID: 2183
13:32:29.874255 main Package type: LINUX_64BITS_GENERIC (OSE)
13:32:29.878842 main 6.1.38_Gentoo r153438 started. Verbose level = 0
13:32:29.879537 main vbglR3GuestCtrlDetectPeekGetCancelSupport: Supported (#1) |
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