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20040921 rpc.ldmd signal 11s

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  • Subject: 20040921 rpc.ldmd signal 11s
  • Date: Tue, 21 Sep 2004 11:03:05 -0600
Art,

>Date: Fri, 17 Sep 2004 17:33:32 -0400 (EDT)
>From: "Arthur A. Person" <address@hidden>
>Organization: Penn State University
>To: Steve Emmerson <address@hidden>
>Subject: Re: 20040917 rpc.ldmd signal 11s 
> Keywords: 200408311254.i7VCsh8E018445

The above message contained the following:

> But it still doesn't dump core when I SEGV the child process.

According to the attached email from our System Administrator, it
looks like you'll have to jump through some hoops in order to get the
setuid-root rpc.ldmd program to dump core.

Alternatively, if you run the LDM system as root, then it might dump
core on its own.

I haven't been able to reproduce your problem on our Linux system that's
closest to yours.

Let me know how you want to handle this.

Regards,
Steve Emmerson
--- Begin Message ---
  • Subject: Re: suid root coredump enabled on emo (fwd)
  • Date: Tue, 21 Sep 2004 10:53:14 -0600
Steve,

The good news is that the Linux kernel finally includes the setuid root
core file patches we had applied previously.  The bad news is that this
happened in the v2.4.23-pre2 kernel as of about September 2003.  Our
Fedora Core installations have it rolled-in and can be enabled;

  sysctl -w kernel.core_setuid_ok=1

 or

  echo 1 > /proc/sys/kernel/core_setuid_ok

More bad news is that RedHat Enterprise kernel installed on lead1 is
too old to support the change.  We can check to see if a kernel update
is available for lead1.

mike

On Sep 17,  3:44pm, Steve Emmerson wrote:
> Subject: suid root coredump enabled on emo (fwd)
> Mike,
>
> I found this for BSD systems.
>
> --Steve
>
> ------- Forwarded Message
>
> Date:    Tue, 01 Jul 2003 08:39:51 MDT
> To:      address@hidden
> From:    "Mike Schmidt" <address@hidden>
> Subject: suid root coredump enabled on emo
>
> emo# sysctl -w kern.sugid_coredump=1
>
> mike


On Sep 21,  9:49am, Steve Emmerson wrote:
> Subject: getting setuid-root program to dump core on Linux
> Mike,
>
> What's the magic needed to get a setuid-root program to dump core on
> Linux, specifically
>
>     RHEL 3 U3 kernel 2.4.21-15.0.4.ELsmp
>
> (this is almost identical to Lead1, which is 2.4.21-15.0.3.ELsmp).

--- End Message ---