On Sáb, 2015-05-16 at 18:40 +0200, poma wrote:
> On 13.05.2015 21:52, jd1008 wrote:
> > 
> > 
> > On 05/13/2015 01:43 PM, Frank Mehnert wrote:
> >> Hi Joe,
> >>
> >> On Wednesday 13 May 2015 13:28:03 jd1008 wrote:
> >>> Thank you for this update.
> >>>
> >>> I was wondering why Oracle no longer builds VB
> >>> for the latest release of Fedora.
> >>
> >> VirtualBox 4.3.28 is built in a Fedora 18 chroot. We have tested this
> >> package works well in Fedora 21. This is also stated on the download
> >> page and there is also a Fedora 21 repository containing that package.
> >> The repository is not yet up-to-date, this will finish during the next
> >> hour. Once Fedora 22 is released we will test VirtualBox on this Linux
> >> distribution and then decide if we need to set up a F22 chroot or if
> >> the F18 chroot will still make it.
> >>
> >> Kind regards,
> >>
> >> Frank
> > Thank you Dr. Mehnert.
> > I thought that every Fedora kernel is compiled to only accept
> > modules that were compiled for the specific kernel version
> > of the Fedora release version.
> ...
> 
> Fedora kernels are configured to drive in "permissive" mode,
> e.g.
> 
> $ grep CONFIG_MODULE_SIG_FORCE /boot/config-4.0.3-202.fc21.x86_64 
> # CONFIG_MODULE_SIG_FORCE is not set
> 
> therefore, properly signed *and* unsigned modules are loadable,
> e.g.
> 
> - unsigned:
> 
> $ modinfo vboxdrv 
> filename:       /lib/modules/4.0.3-202.fc21.x86_64/extra/vboxdrv.ko
> version:        4.3.28 (0x001a000a)
> license:        GPL
> description:    Oracle VM VirtualBox Support Driver
> author:         Oracle Corporation
> srcversion:     CB0F241526E12BE494014CF
> depends:        
> vermagic:       4.0.3-202.fc21.x86_64 SMP mod_unload 
> parm:           force_async_tsc:force the asynchronous TSC mode (int)
> 
> 
> # sign-file -v sha256 signing_key.priv signing_key.x509 
> /lib/modules/4.0.3-202.fc21.x86_64/extra/vboxdrv.ko 
> Size of unsigned module: 490384
> Size of signer's name  : 25
> Size of key identifier : 20
> Size of signature      : 514
> Size of information    : 12
> Size of magic number   : 28
> Signer's name          : 'Fedora kernel signing key'
> Digest                 : sha256
> 
> - properly signed:
> 
> $ modinfo vboxdrv 
> filename:       /lib/modules/4.0.3-202.fc21.x86_64/extra/vboxdrv.ko
> version:        4.3.28 (0x001a000a)
> license:        GPL
> description:    Oracle VM VirtualBox Support Driver
> author:         Oracle Corporation
> srcversion:     CB0F241526E12BE494014CF
> depends:        
> vermagic:       4.0.3-202.fc21.x86_64 SMP mod_unload 
> signer:         Fedora kernel signing key
> sig_key:        95:7D:C8:E5:9F:5D:E6:03:71:49:1A:D0:9A:C6:8F:85:16:6C:B3:94
> sig_hashalgo:   sha256
> parm:           force_async_tsc:force the asynchronous TSC mode (int)
> 
> 
> $ dmesg -t | grep -i X.*509
> Asymmetric key parser 'x509' registered
> Loading compiled-in X.509 certificates
> Loaded X.509 cert 'Fedora kernel signing key: 
> 957dc8e59f5de60371491ad09ac68f85166cb394'
> 
> 
> Ref.
> https://www.kernel.org/doc/Documentation/module-signing.txt

I have to check this, "therefore, properly signed *and* unsigned modules
are loadable" seems not totally correct :

https://ask.fedoraproject.org/en/question/65473/virtualbox-error/ 

"Virtualbox will not work with secure boot enabled
because it relies on its own kernel modules being loaded, which they
cannot due to secure boot" 

I have to check If we can sign kmod on RPMFusion , if it is
packageable ? Have you any clue on this matter ? 

Thanks, 
-- 
Sérgio M. B.


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