Date: Sat, 27 Apr 2002 18:47:19 -0400 (EDT) From: Thomas David Rivers <rivers@dignus.com> To: kris@obsecurity.org, rivers@dignus.com Cc: portmgr@FreeBSD.ORG, ports@FreeBSD.ORG, stable@FreeBSD.ORG Subject: Re: HEADS UP! XFree86 has been upgraded to 4.2.0 in 4.5-STABLE Message-ID: <200204272247.g3RMlJS84696@lakes.dignus.com> In-Reply-To: <20020427140128.A89621@xor.obsecurity.org>
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Kris Kennaway <kris@obsecurity.org> wrote:
>
> On Sat, Apr 27, 2002 at 07:50:10AM -0400, Thomas David Rivers wrote:
> > > Since this is a nontrivial change and the 4.6 release cycle is
> > > just around the corner (code freeze: May 1), please test this
> > > as much as possible and report any problems or unexpected
> > > behaviour to ports@FreeBSD.org and portmgr@FreeBSD.org.
> > >
> >
> > Several people have already reported this particular issue
> > with XF86 4.2 (on FreeBSD 4.5-RELEASE).
> >
> > And - thus far, there is no resolution.
> >
> > When I install Netscape (ftp'd from ftp.netscape.org) and
> > try and run it, I get:
>
> I've never seen that. I presume it would go away if you remove
> your /usr/X11R6 installation and reinstall it, since this failure
> is not there for clean installations -- it must be due to some
> stale directory on your system which netscape is detecting, which
> does not have any files in it. If you ktrace the netscape binary
> you should be able to find where it's looking.
>
> Kris
Ah! Excellent idea!
And - by some lucky coincidence, I have more to report on the
problem.
I started to ktrace the netscape executable - when I thought I should
be root to do this...
And - surprise - surprise - as root - there is no problem.
Well - I should say that netscape seems to start up as usual
(it does give the message about XNLS - but doesn't dump core.)
When I try to run netscape as a non-root user, I see the message
about XNLS and then it dumps.
So... let's worry about the locale problems first.
It seems netscape opens & successfully reads the following locale
related files:
84483 netscape NAMI "/usr/X11R6/lib/X11/locale/C/XI18N_OBJS"
84483 netscape NAMI "/usr/X11R6/lib/X11/locale/common/xlcDef.so.2"
84483 netscape NAMI "/usr/X11R6/lib/X11/locale/locale.alias"
84483 netscape NAMI "/usr/X11R6/lib/X11/locale/locale.dir"
Netscape successfully opens /usr/X11R6/lib/X11/locale/common/xlcDef.so.2,
then reads the first 32 bytes - getting an ELF header. It then
declares that `C' locales are not supported. Here's the meaningful
kdump info:
84483 netscape CALL stat(0xd24540,0xbfbfdef4)
84483 netscape NAMI "/usr/X11R6/lib/X11/locale/common/xlcDef.so.2"
84483 netscape RET stat 0
84483 netscape CALL open(0xd24540,0,0)
84483 netscape NAMI "/usr/X11R6/lib/X11/locale/common/xlcDef.so.2"
84483 netscape RET open 8
84483 netscape CALL read(0x8,0xbfbfded4,0x20)
84483 netscape GIO fd 8 read 32 bytes
"\^?ELF\^A\^A\^A \0\0\0\0\0\0\0\0\^C\0\^C\0\^A\0\0\0`\a\0\0004\0\0\0"
84483 netscape RET read 32/0x20
84483 netscape CALL close(0x8)
84483 netscape RET close 0
84483 netscape CALL write(0x2,0xbfbfe1d0,0x24)
84483 netscape GIO fd 2 wrote 36 bytes
"netscape: locale `C' not supported.
"
Could the problem be that there is a missing a.out-style
shared library for xlcDef.so.2?
Now - as to the second problem - Netscape just dumping
core...
After the close(0x8) you see above, Netscape does a socket()
(i.e. fd #8 is now a socket.) (Which I'm guessing is the X11
socket - it could be that setting the DISPLAY to :0 avoids
the core dump.)
Netscape seems to do a writev() to that socket, and then immediately
SIGSEGV:
84483 netscape GIO fd 8 read 32 bytes
"\^A\^A\M-n\^O\0\0\0\0*\0\0\0\0\0\0\0\^E\0\f\0\0\0\0\0\v\0\0\0p\^PD\b"
84483 netscape RET read 32/0x20
84483 netscape CALL writev(0x8,0xbfbfe098,0x2)
84483 netscape GIO fd 8 wrote 2060 bytes
... lots of stuff (probably X11 packets) ...
84483 netscape RET writev 2060/0x80c
84483 netscape PSIG SIGSEGV caught handler=0x9052d0 mask=0x0 code=0x0
84483 netscape CALL getpid
84483 netscape RET getpid 84483/0x14a03
84483 netscape CALL kill(0x14a03,0xa)
84483 netscape PSIG SIGBUS SIG_DFL
84483 netscape NAMI "netscape.core"
And - as I mentioned at the start - if I run Netscape as root,
I don't get the SIGSEGV.
- Dave Rivers -
--
rivers@dignus.com Work: (919) 676-0847
Get your mainframe programming tools at http://www.dignus.com
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