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Date:      Mon, 06 May 2019 00:26:31 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 237715] maxproc needs a default value
Message-ID:  <bug-237715-227-1IP9GvOMYJ@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-237715-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-237715-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D237715

sigsys@gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |sigsys@gmail.com

--- Comment #1 from sigsys@gmail.com ---
It's hard to pick a sensible default though.  OpenBSD has default (per
architecture) rlimits, which I think is a good idea, but they often have to=
 be
changed.

There's kern.maxprocperuid which can default to something calculated based =
on
hardware resources.  It's set a bit lower than maxproc as it is, but not en=
ough
to protect the system in most cases it seems.

A process count limit alone only protects you against accidental fork bombs=
.=20
And then again, it probably only protects other users from it, it's pretty =
hard
to recover your session when you can't spawn more processes.

I guess that's the reason it hasn't been done already, it's not a good
protection by itself and setting a whole bunch of resource limits is too
difficult (and required to set very low per-process limits to be effective
before rctl).

--=20
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