On Fri, Nov 02, 2012 at 11:50:24PM -0400, Phil Pennock wrote:
> On 2012-11-02 at 13:32 -0600, The Doctor wrote:
> > 2012-11-01 22:08:42 1TU8XV-0006bT-9B == netknowca@??? R=dnslookup T=remote_smtp defer (-1): smtp transport process returned non-zero status 0x000b: terminated by signal 11
> > 2012-11-01 22:09:42 1TU8Yn-0006h2-F0 == swttwt0606@??? R=dnslookup T=remote_smtp defer (-1): smtp transport process returned non-zero status 0x000b: terminated by signal 11
>
> That means that the Exim delivery process is crashing with a SIGSEGV,
> because of the TLS usage. So you're crashing inside OpenSSL.
>
> To date, there have been three reasons for this:
>
> (1) memory corruption on a bad system, flipping bits
> (2) Exim built against a different version of OpenSSL than running
> against
> (3) Unknown cause, happening deep inside OpenSSL.
>
> The third case was fairly recently on exim-dev. Only one report so far,
> so if this is the problem you have then you'd make report #2.
>
> The problem here is that Exim is setuid, so crash-dumps are normally
> inhibited by the kernel and it requires a lot of potentially dangerous
> fiddling to override that. So proving where this happens requires some
> diagnostic and C programming skill.
>
> For this third case, so far it looks like a mystery crash inside OpenSSL
> and we haven't yet found a cause or anything that Exim is doing to
> trigger it.
>
> Building against GnuTLS avoids the issue.
>
> Can you tell us more about how OpenSSL was built?
I have GNUTLS and that simply dies for a reason.
Right compiled Exim with only the correct OpenSSL version.
>
> -Phil
>
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