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Re: udev strangeness with latest rawhide

Le samedi 16 octobre 2004 Ã 19:44 +1000, Russell Coker a Ãcrit :
> Running the latest rawhide I get AVC messages indicating that /bin/udev 
> (not /sbin/udev) is running in kernel_t during the early stages of system 
> boot.
> /bin/udev is the file name used in the initrd!

$ zcat /boot/initrd-2.6.8-1.624.img | cpio -iv -m -d
$ ll -d bin sbin
drwxr-xr-x  2 root root 4096 oct 16 11:50 bin
lrwxrwxrwx  1 root root    3 oct 16 11:50 sbin -> bin
$ ll bin/udev
-rwxr-xr-x  1 root root 557808 oct 15 18:05 bin/udev

>   So it seems that after the SE 
> Linux policy is loaded (IE after /sbin/init has been run from the main root 
> fs) there is still a copy of udev from the initrd being run.

There are some sleep() in udev.  hotplug/udev/... are launched in
background. Modprobe/insmod can return even if udev has not finished its
$ grep insmod init
insmod /lib/raid0.ko
insmod /lib/jbd.ko
insmod /lib/ext3.ko

It's how I understand hotplug/udev.

>   This seems to 
> be a bug in initrd that could lead to inconsistent behaviour.  I'm not sure 
> how this comes about (and of course apart from SE Linux messages in the 
> kernel message log all the evidence is gone by the time the system is ready 
> to login).
> Any suggestions on how to debug this?
> -- 
> http://www.coker.com.au/selinux/   My NSA Security Enhanced Linux packages
> http://www.coker.com.au/bonnie++/  Bonnie++ hard drive benchmark
> http://www.coker.com.au/postal/    Postal SMTP/POP benchmark
> http://www.coker.com.au/~russell/  My home page

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