Bug#553268: libc6: Not working SCP/SFTP in 32bit domU(lenny) on 64bit Xen dom0(lenny amd64)

[Aurelien Jarno <aurelien@aurel32.net>]

Ondrej Svoboda a écrit :
> Package: libc6
> Version: 2.3.6.ds1-13etch9+b1
> Severity: important
> 
> Hi,
> I have domU lenny and trying to acces via SFTP or SCP. User has shell
> scponlyc and is chrooted in his homedirectory. I'm getting following
> errors:
> When using SCP:
> Command 'groups'
> failed with return code 127 and error message
> Inconsistency detected by ld.so: rtld.c: 1108: dl_main: Assertion `(void *)
> ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed!.
> Command 'pwd'
> failed with return code 127 and error message
> Inconsistency detected by ld.so: rtld.c: 1108: dl_main: Assertion `(void *)
> ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed!.
> ... for each command the same error
> 
> When using SFTP:
> Connection has been unexpectedly closed. Server sent command exit status
> 127.
> Cannot initialize SFTP protocol. Is the host running a SFTP server?
> 
> and in auth.log I have:
> Oct 29 20:31:55 dude sshd[21827]: Accepted password for test from
> 127.0.0.1 port 39651 ssh2
> Oct 29 20:31:55 dude sshd[21835]: subsystem request for sftp
> Oct 29 20:31:55 dude scponly[21836]: chrooted binary in place, will chroot()
> Oct 29 20:31:56 dude scponly[21836]: 3 arguments in total.
> Oct 29 20:31:56 dude scponly[21836]: ^Iarg 0 is scponlyc
> Oct 29 20:31:56 dude scponly[21836]: ^Iarg 1 is -c
> Oct 29 20:31:56 dude scponly[21836]: ^Iarg 2 is /usr/lib/openssh/sftp-server
> Oct 29 20:31:56 dude scponly[21836]: opened log at LOG_AUTHPRIV, opts
> 0x00000029
> Oct 29 20:31:56 dude scponly[21836]: retrieved home directory of
> "/home/test/" for user "test"
> Oct 29 20:31:56 dude scponly[21836]: chrooting to dir:
> "/home/test/"
> Oct 29 20:31:56 dude scponly[21836]: chdiring to dir: "/"
> Oct 29 20:31:56 dude scponly[21836]: chdiring to dir: "/"
> Oct 29 20:31:56 dude scponly[21836]: setting uid to 9295
> Oct 29 20:31:56 dude scponly[21836]: processing request:
> "/usr/lib/openssh/sftp-server"
> Oct 29 20:31:56 dude scponly[21836]: running: /usr/lib/sftp-server
> (username: test(9295), IP/port: localhost 39651 22)
> 
> I have the same domU running on Xen lenny 32bit and there is working OK. So
> the only difference is between lenny version of dom0.
> 

I am a bit confused about what runs Lenny, and what runs Etch. You
reported this bug on the Etch version of libc6 while you talk about a
Lenny domU.

Can you please synthesise which combination of dom0/domU works, and
which one does not work?

Note that it is most probably a Xen problem, not a libc6 one.

-- 
Aurelien Jarno                          GPG: 1024D/F1BCDB73
aurelien@aurel32.net                 http://www.aurel32.net