[Bug-tar] Strange library/permission problem after untaring

[Brannon Klopfer]

Hello all,

I have been having a very strange problem as of late. First, the situation:

Computers: myth.stanford.edu, my laptops, running Slackware 10.0 and 10.2.

My laptop is fairly short on computational power (a 366MHz Pentium II), 
and I don't have the local disk space to comfortably carry the Linux 
kernel sources. Hence, I use my school's (Stanford) computers to handle 
all my kernel compilation needs. I use my script ( 
http://www.stanford.edu/~bklopfer/files/remotek ) to do all of this for 
me (I run this on myth.stanford.edu).

The script downloads and compiles the kernel source, then tar's all the 
modules and kernel into a nice tarball, which is then accessible at 
http://www.stanford.edu/~bklopfer/kernel+mods.tar . After downloading 
this file via wget, I untar it with "sudo tar xvf kernel+mods.tar -C /" 
(or run as root, sans sudo), putting everything in the proper place 
(i.e., vmlinuz goes to /vmlinuz, etc.). However, as soon as I run this 
command, every binary on my system becomes unusable to all but root! The 
permissions are not altered, but no user can do anything -- trying to 
login results in "/bin/sh: permission denied". It took me quite a while 
to find out a fix for this, but one can be found by reinstalling the 
Slackware package "glibc-solibs". After that, everything works as expected.

This is a new problem -- I ran it before the start of school several 
times, and it worked flawlessly. I believe it is a problem with 
Stanford's computers, but I'm not sure (it affects both my systems, one 
running Slackware 10.0 and one running 10.2 -- again, I'm pretty sure it 
worked on these systems earlier). The versions of tar used are

Laptops, running Slackware 10.0, 10.2: tar version 1.14, 1.15.1
myth.stanford.edu, running Ubuntu GNU/Linux 5.04/Hoary: tar version 1.13

Thanks, and sorry to bug people...
Brannon Klopfer