symbolfunction(): compiletime configuration error? Failed to open "libc.so": /usr/lib/x86_64-linux-gnu/libc.so: invalid ELF header

[Bruno Bigras]

I wasn't able to start dante-server on Ubuntu 11.10 (oneiric)

$ sudo service danted start
Starting Dante SOCKS daemon: Mar 14 13:20:22 (1331731222) danted[16798]: socks_seteuid(): old: 0, new: 13
Mar 14 13:20:22 (1331731222) danted[16798]: socks_reseteuid(): current: 13, new: 0
Mar 14 13:20:22 (1331731222) danted[16798]: socks_seteuid(): old: 0, new: 65534
Mar 14 13:20:22 (1331731222) danted[16798]: socks_reseteuid(): current: 65534, new: 0
Mar 14 13:20:22 (1331731222) danted[16798]: socks_seteuid(): old: 0, new: 65534
Mar 14 13:20:22 (1331731222) danted[16798]: socks_reseteuid(): current: 65534, new: 0
Mar 14 13:20:22 (1331731222) danted[16798]: fixsettings(): no methods enabled (total block)
Mar 14 13:20:22 (1331731222) danted[16798]: symbolfunction(): compiletime configuration error? Failed to open "libc.so": /usr/lib/x86_64-linux-gnu/libc.so: invalid ELF header
Mar 14 13:20:22 (1331731222) danted[16798]: sockdexit()
Mar 14 13:20:22 (1331731222) danted[16798]: sockdexit(): terminating

[jan edholm (jan-edholm)]

Same for me. Bummer. Worked so nice before...

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[gk (kellygp)]

This is related to: https://bugs.launchpad.net/ubuntu/+source/dante/+bug/816153

Bacause if I change the filename in the workaround the same technique works again:

sudo ln -sf /lib/x86_64-linux-gnu/libc-2.13.so /usr/lib/x86_64-linux-gnu/libc.so

changed to

sudo ln -sf /lib/x86_64-linux-gnu/libc-2.15.so /usr/lib/x86_64-linux-gnu/libc.so

See libc-2.15 for 12.04

[Charles (slivkoff)]

This issue continues in 12.04

The workaround of linking libc.so in /usr/lib/x86_64-linux-gnu/ will cause a problem with libc6-dev.

$ dpkg -S /usr/lib/x86_64-linux-gnu/libc.so
libc6-dev: /usr/lib/x86_64-linux-gnu/libc.so

Instead, by running danted through strace, I found:

  open("/lib/x86_64-linux-gnu/libc.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)

just before

  open("/usr/lib/x86_64-linux-gnu/libc.so", O_RDONLY|O_CLOEXEC) = 4

Which then caused the error.

So, here is a cleaner solution:

$ cd /lib/x86_64-linux-gnu
$ sudo ln -s libc.so.6 libc.so