undefined symbols with kernel 5.5 and version 6.1.2

[francois_val]

When I try to compile virtualbox kernel modules with kernel 5.5-rc6, I get plenty of undefined symbols:

ERROR: "VBoxHost_RTStrPrintf" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetadp/vboxnetadp.ko undefined! ERROR: "VBoxHost_RTErrConvertToErrno" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetadp/vboxnetadp.ko undefined! ERROR: "VBoxHost_RTErrConvertFromErrno" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetadp/vboxnetadp.ko undefined! ERROR: "VBoxHost_RTLogLoggerEx" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetadp/vboxnetadp.ko undefined! ERROR: "VBoxHost_RTLogRelGetDefaultInstanceEx" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetadp/vboxnetadp.ko undefined! ERROR: "VBoxHost_RTStrToUInt32" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetadp/vboxnetadp.ko undefined! ERROR: "VBoxHost_RTR0Term" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetadp/vboxnetadp.ko undefined! ERROR: "VBoxHost_RTR0Init" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetadp/vboxnetadp.ko undefined! make[3]: * [scripts/Makefile.modpost:94: modpost] Error 1 make[2]: * [Makefile:1606: modules] Error 2 make[2]: Leaving directory '/usr/src/linux-5.5' make[1]: * vboxnetadp Error 2 make[1]: Leaving directory '/var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetadp' make: * [Makefile:74: vboxnetadp] Error 1 make: * Waiting for unfinished jobs.... ERROR: "VBoxHost_RTErrConvertToErrno" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTUuidFromStr" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTErrConvertFromErrno" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTLogLoggerEx" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTNetIPv6PseudoChecksumEx" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTSpinlockDestroy" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTUuidCompareStr" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTSemEventCreate" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTSemFastMutexRequest" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTLogRelGetDefaultInstanceEx" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTSemEventSignal" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTMemAllocTag" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTSemEventWait" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTNetIPv4PseudoChecksum" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTNetIPv4FinalizeChecksum" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTSemFastMutexRelease" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTSpinlockAcquire" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTR0Term" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTMemFree" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTTimeNanoTS" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTSemEventDestroy" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTThreadPreemptIsEnabled" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTSpinlockRelease" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTSemFastMutexDestroy" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTMemAllocZVarTag" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTSemFastMutexCreate" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTR0Init" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "SUPDrvLinuxIDC" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTSpinlockCreate" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined! ERROR: "VBoxHost_RTNetIPv4HdrChecksum" var/tmp/portage/app-emulation/virtualbox-modules-6.1.2/work/vboxnetflt/vboxnetflt.ko undefined!

Does anybody have an idea about this ?

[francois_val]

log for the failed build

[Frank Batschulat (Oracle)]

5.5 kernel version support has long been released

Ticket #19145 linux: kernel 5.5-rc1/rc2 - we need changes -> fixed in 6.1.4 https://www.virtualbox.org/ticket/19145

also the following changeset was important:

https://www.virtualbox.org/changeset/82695/vbox