openssh unix dev - Apr 2006 - segfaulting on x86_64 for latest version

Hi!

I've downloaded yesterday the version  openssh-4.3p2. Compiled and
installed without problems. No optimization options were used, no PAM.

sshd starts also without any problem.

But when I try to connect to it, the connection is immidiately closed
and I get in the dmesg the following

sshd[5246]: segfault at 00002aaaaabbfe40 rip 00002aaaaaab0bf3 rsp
00007fffffef54d0 error 7


Here is the output from ldd

        libcrypto.so.0.9.7 => /usr/lib/libcrypto.so.0.9.7
(0x00002aaaaabc1000)
        libutil.so.1 => /lib/libutil.so.1 (0x00002aaaaae01000)
        libz.so.1 => /lib/libz.so.1 (0x00002aaaaaf05000)
        libnsl.so.1 => /lib/libnsl.so.1 (0x00002aaaab019000)
        libcrypt.so.1 => /lib/libcrypt.so.1 (0x00002aaaab130000)
        libresolv.so.2 => /lib/libresolv.so.2 (0x00002aaaab265000)
        libc.so.6 => /lib/libc.so.6 (0x00002aaaab379000)
        libdl.so.2 => /lib/libdl.so.2 (0x00002aaaab597000)
        /lib64/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2
(0x00002aaaaaaab000)

I'm not subscribed to the list, so please send questions directly to me.

Voropaev Andrei

On Sat, Apr 08, 2006 at 10:39:59AM +0200, Andrei A. Voropaev wrote:
[...]
> But when I try to connect to it, the connection is immidiately closed
> and I get in the dmesg the following
> 
> sshd[5246]: segfault at 00002aaaaabbfe40 rip 00002aaaaaab0bf3 rsp
00007fffffef54d0 error 7
Just wanted to add, that I tried previous version (4.2p1) with exactly
the same problem. Finally I've stopped on 3.9p1, which works.

Voropaev Andrei

Andrei A. Voropaev wrote:
> I've downloaded yesterday the version  openssh-4.3p2. Compiled and
> installed without problems. No optimization options were used, no PAM.
> 
> sshd starts also without any problem.
> 
> But when I try to connect to it, the connection is immidiately closed
> and I get in the dmesg the following
> 
> sshd[5246]: segfault at 00002aaaaabbfe40 rip 00002aaaaaab0bf3 rsp
00007fffffef54d0 error 7
What version of OpenSSL and zlib did you compile with?

Could you please run ssh and sshd in debug mode and see where the crash 
occurs?  (eg run "/path/to/sshd -ddd -p 2022" then connect to port
2022
with "ssh -vvv -p 2022 yourserver").

Also, if sshd generates a core dump, can you feed it to gdb and get a 
backtrace ("gdb /path/to/sshd core" the "bt").

-- 
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4  37C9 C982 80C7 8FF4 FA69
     Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.

On Sat, 8 Apr 2006, Andrei A. Voropaev wrote:
> Hi!
> 
> I've downloaded yesterday the version  openssh-4.3p2. Compiled and
> installed without problems. No optimization options were used, no PAM.
> 
> sshd starts also without any problem.
> 
> But when I try to connect to it, the connection is immidiately closed
> and I get in the dmesg the following
> 
> sshd[5246]: segfault at 00002aaaaabbfe40 rip 00002aaaaaab0bf3 rsp
00007fffffef54d0 error 7
> 
> 
> Here is the output from ldd
> 
>         libcrypto.so.0.9.7 => /usr/lib/libcrypto.so.0.9.7
(0x00002aaaaabc1000)
>         libutil.so.1 => /lib/libutil.so.1 (0x00002aaaaae01000)
>         libz.so.1 => /lib/libz.so.1 (0x00002aaaaaf05000)
>         libnsl.so.1 => /lib/libnsl.so.1 (0x00002aaaab019000)
>         libcrypt.so.1 => /lib/libcrypt.so.1 (0x00002aaaab130000)
>         libresolv.so.2 => /lib/libresolv.so.2 (0x00002aaaab265000)
>         libc.so.6 => /lib/libc.so.6 (0x00002aaaab379000)
>         libdl.so.2 => /lib/libdl.so.2 (0x00002aaaab597000)
>         /lib64/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2
(0x00002aaaaaaab000)
> 
>From ldd output and kernel error line you provided I suspect a bug in your 
glibc, namely in dynamic loader /lib64/ld-linux-x86-64.so.2. OpenSSH 3.9p1 is 
fine with it, while later releases somehow provoke that bug.
-- 

    Sincerely Your, Dan.