Re: 7.2.1 segfaults.

On Fri, 3 May 2002, Tom Lane wrote:

> Stephen Amadei <amadei@dandy.net> writes:
> >> Urgh.  Can you provide a stack trace?
>
> > You mean using strace?  Yeah.  The strace created quite a bit of logs, but
> > the process that segfaulted is included below.
>
> > open("/usr/local/pgsql/data/global/1262", O_RDONLY) = 4
> > read(4, "\0\0\0\0\f\222\20\0\7\0\0\0\34\0\244\37\0 \0 \244\37\0"..., 8192) = 8192
> > --- SIGSEGV (Segmentation fault) ---
>
> Hmm, this does not square with your prior statement that it's a chroot
> can't-call-/bin/cp issue.

It's not.  I don't mean to confuse the two separate problems, that's why
I made two threads.  In order to be sure that neither GRSecurity or the
chroot was causing the segfault, I disabled these features and ran
postmaster as a normal user would... but I still connected via TCPIP.

> Would you set things up to allow a core dump
> (ie, not ulimit -c 0) and then do "gdb postgres-executable corefile"
> followed by "bt"?

Uh... sure.   This will take a moment.

O.K... I think I have the info.

#0 0x255843 in strncpy (s1=0xbfffead0 "n\013", s2=0x8213414 "n\013",
   n=4294967292) at ../sysdeps/generic/strncpy.c:82
#1 0x81516ab in GetRawDatabaseInfo ()
#2 0x81511fb in InitPostgres ()

I am not real familiar with gdb, so I only vaguely know what this shows,
besides stack.  And in the above info, the 'n' in "n\013" actually has a
little '~' above it, but I figured that character might get managed by the
email.

                    ----Steve
Stephen Amadei
Dandy.NET!  CTO
Atlantic City, NJ