Re: ptrace patch for vanilla kernel 2.4.20
On Wed, Apr 23, 2003 at 09:35:32AM +0200, Alexander Schmehl wrote:
>
> * Adam ENDRODI <borso@vekoll.saturnus.vein.hu> [030423 07:59]:
>
> > > http://www.ussg.iu.edu/hypermail/linux/kernel/0303.2/0226.html
> > > http://sinuspl.net/ptrace/
> > Can you tell me whether these patches are the ones which were
> > known to break something?
>
> I didn't heard of a patch to break something, yet. The second one
> applied clean, and I didn't encountered any problems on four different
> machines.
> Did I miss something?
There've been some problems, I'm afraid. Here's what I've found
in the archives of lkml:
Thread ``Oops: ptrace fix buggy'':
http://marc.theaimsgroup.com/?t=104971858600001&r=1&w=2
Thread ``ptrace patch side-effects on 2.4.x'':
http://marc.theaimsgroup.com/?t=104971764200001&r=1&w=2
Thread ``ptrace fix changes output of ps ax'':
http://marc.theaimsgroup.com/?t=104968425100002&r=1&w=2
Thread ``after ptrace patch'':
http://marc.theaimsgroup.com/?t=104948324000003&r=1&w=2
Especially http://marc.theaimsgroup.com/?l=focus-linux&m=104990668007208&w=2 :
# Yes, the most annoying side effect of the ptrace patch is that it broke
# the ability to strace a non-root process. Very secure, but it makes
# troubleshooting quite difficult.
The most sensible workaround I've heard is disabling kmod
(CONFIG_KMOD=n).
bit,
adam
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