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[Gcl-devel] Re: unexec and fedora core 4

From: Juho Snellman
Subject: [Gcl-devel] Re: unexec and fedora core 4
Date: Fri, 9 Dec 2005 10:09:33 +0000 (UTC)
User-agent: slrn/ (Linux)

<address@hidden> wrote:
> Greetings!  I am a developer of GCL, which shares unexec with emacs.
> I have noticed on certain recent Fedora Core 4 machines, binaries
> produced with unexec cannot mprotect memory (allocated with brk)
> PROT_EXEC (returning EACCESS, i.e. permission denied), whereas
> binaries output by ld can do so just fine.  This does not vary with
> exec-shield or randomize_va_space settings, and appears quite machine
> specific.  The same binary which functions perfectly normally on one
> fc4 machine shows this failure only on another machine.  I have as yet
> been unable to correlate this with dynamic library placement, or other
> settings in /proc/sys.

Just a guess, but this might be related to SELinux. Do the machines
have differences in /etc/selinux/config?

Juho Snellman

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