[Pkg-openssl-devel] Bug#665836: Bug#665836: openssh-server: segfault error 6 in libcrypto.so.1.0.0

[Kurt Roeckx]

On Mon, Mar 26, 2012 at 04:36:33PM -0400, Michael Welsh Duggan wrote:
> Kurt Roeckx <kurt at roeckx.be> writes:
> 
> > On Mon, Mar 26, 2012 at 07:45:08PM +0200, Kurt Roeckx wrote:
> >> On Mon, Mar 26, 2012 at 01:03:31PM -0400, Michael Welsh Duggan wrote:
> >> > Kurt Roeckx <kurt at roeckx.be> writes:
> >> > 
> >> > > On Mon, Mar 26, 2012 at 09:20:47AM -0400, Michael Welsh Duggan wrote:
> >> > >> Package: openssh-server
> >> > >> Version: 1:5.9p1-4
> >> > >> Severity: important
> >> > >> 
> >> > >> Dear Maintainer,
> >> > >> 
> >> > >> When connecting to my home machine while forwarding ports, I keep getting
> >> > >> segfaults in sshd whenever the forwarded ports are used.  This includes
> >> > >> X forwarding.  The errors that appear in my syslog look like this:
> >> > >> 
> >> > >> Mar 26 09:11:41 maru kernel: sshd[9320]: segfault at b8749000 ip
> >> > >> b752f678 sp bfde6de0 error 6 in libcrypto.so.1.0.0[b74c6000+1a3000]
> >> > >> Mar 26 09:11:52 maru kernel: sshd[10647]: segfault at b81fa008 ip
> >> > >> b753b678 sp bf9d42d0 error 6 in libcrypto.so.1.0.0[b74d2000+1a3000]
> >> > >> Mar 26 09:11:56 maru kernel: sshd[10680]: segfault at b8563000 ip
> >> > >> b759b678 sp bfdff0a0 error 6 in libcrypto.so.1.0.0[b7532000+1a3000]
> >> > >
> >> > > I'm unable to reproduce this.
> >> > >
> >> > > I've tried using openssh-server 1:5.9p1-4 and libssl1.0.0 1.0.1-2 on the
> >> > > server side, openssh-client 1:5.9p1-3 and libssl1.0.0 1.0.0h-1 on
> >> > > the client side, and used ssh -X.
> >> > 
> >> > I am using OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 on the client side.
> >> > (This client worked in previous versions.)
> >> > 
> >> > > I'm using an RSA key if that has anything to do with it.
> >> > 
> >> > I am using a DSA key.
> >> > 
> >> > > I didn't try anything like -L or -R, should I try those?
> >> > 
> >> > Did you attempt to pull use the tunneled X connection?  Nothing failed
> >> > for me until I did.
> >> 
> >> I started a remote xterm and closed it, and then closed the ssh
> >> session.
> >> 
> >> I've set up a tunnel using -L, and then used that tunnel.  I tried
> >> to close the tunnel connection first, try to log out (and hang)
> >> first, just closed the ssh connection (~.) ...
> >> 
> >> I'm not sure what else I can try.
> >> 
> >> I'm not sure what you mean with "to pull use".
> >
> > Can you attach gdb to the sshd, and then make it crash and
> > send me a backtrace?
> 
> I'll attempt to do this, but it may take a while.  I can't do it from
> here, as I am using ssh to log onto the machine running sshd, and
> causing sshd to crash kills my ssh session.

You could always run the gdb in a screen.

Or I'll just be patient. :)


Kurt