Error loading shared libraries when running lppasswd as root

[lefou]

One Week ago I recognised, that printing with cups 1.1.20 no longer works.
In /var/log/cups/error_log I found:

D [18/Feb/2004:22:45:33 +0100] [Job 14] /usr/lib/cups/filter/pstops: Permission denied
D [18/Feb/2004:22:45:33 +0100] [Job 14] /usr/lib/cups/filter/foomatic-rip: Permission denied

Since then, I tried to resolv the problem, I recompiled different versions of cups and foomatic.
While running revdep-rebuild, I recognised, that lppasswd cannot link against libz, so I tried to recompile it, too, but no luck.

The strange thing is, that if I am an normal user, I cat use lppasswd, but if I'm root I get the following errormessage:

lppasswd: error while loading shared libraries: libz.so.1: cannot open shared object file: Permission denied

The output off 'ldd /usr/bin/lppasswd' as root is:

linux-gate.so.1 => (0xffffe000)
libz.so.1 => not found
libcups.so.2 => not found
libnsl.so.1 => not found
libcrypt.so.1 => not found
libc.so.6 => not found

But the same command as normal user gets:

linux-gate.so.1 => (0xffffe000)
libz.so.1 => /usr/lib/libz.so.1 (0x40018000)
libcups.so.2 => /usr/lib/libcups.so.2 (0x4002e000)
libnsl.so.1 => /lib/libnsl.so.1 (0x4006c000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0x40080000)
libc.so.6 => /lib/libc.so.6 (0x400ad000)
libssl.so.0.9.7 => /usr/lib/libssl.so.0.9.7 (0x401e1000)
libcrypto.so.0.9.7 => /usr/lib/libcrypto.so.0.9.7 (0x40211000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
libdl.so.2 => /lib/libdl.so.2 (0x40315000)

'ls -l /usr/bin/lppasswd' gets:

-rwsr-xr-x 1 lp lp 8944 18. Feb 21:11 /usr/bin/lppasswd

Maybe because lppasswd ist suid?
This is really strange, is'n it?
I'm running Kernel 2.6 on a IBM ThinkPad with a P4-M.

Has anybody ever seen such phenomenon or has some ideas how to repair it?

Many thanks in advance

[lefou]

Nobody, who can help?

The problem is with lppasswd suid-bit set.

# chmod 755 lppasswd
# ldd lppasswd
linux-gate.so.1 => (0xffffe000)
libz.so.1 => /usr/lib/libz.so.1 (0x40018000)
libcups.so.2 => /usr/lib/libcups.so.2 (0x4002e000)
libnsl.so.1 => /lib/libnsl.so.1 (0x4006c000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0x40080000)
libc.so.6 => /lib/libc.so.6 (0x400ad000)
libssl.so.0.9.7 => /usr/lib/libssl.so.0.9.7 (0x401e1000)
libcrypto.so.0.9.7 => /usr/lib/libcrypto.so.0.9.7 (0x40211000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
libdl.so.2 => /lib/libdl.so.2 (0x40315000)
# chmod 4755 lppasswd
# ldd lppasswd
linux-gate.so.1 => (0xffffe000)
libz.so.1 => not found
libcups.so.2 => not found
libnsl.so.1 => not found
libcrypt.so.1 => not found
libc.so.6 => not found

Has anybody an idea, why I cannot link lppasswd in runtime, when suid-bit is set?

Kernel 2.6.3