Re: [PATCH] Longstanding elf fix (2.4.3 fix)

From: Eric W. Biederman (
Date: Tue Apr 24 2001 - 02:19:28 EST

"Manfred Spraul" <> writes:

> > Well looking a little more closely than I did last night it looks like
> > access_process_vm (called from ptrace) can cause what amounts to a
> > page fault at pretty arbitrary times.
> It's also used for several /proc/<pid> files.
> I remember that I got crashes with concurrent exec+cat
> /proc/<pid>/cmdline until down(mmap_sem) was added into
> setup_arg_pages().

O.k. Then the race I'm catching is real though because it is confined
to bss sections, we are quite unlikely to trigger it.

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This archive was generated by hypermail 2b29 : Mon Apr 30 2001 - 21:00:10 EST