On Tue, Nov 29, 2011 at 07:52:52AM -, Jan Rathmann wrote:
> > What does 'ulimit -u' show from a terminal on this system?
> 31517 is the output. My system has 4 GB of RAM.
> Do you think it is appropriate for this case to open a new bug report
> against the kernel?
Yes, please. If the limit
Am 28.11.2011 17:17, schrieb Steve Langasek:
> How does it "crash"?
I apologize if the term "crash" was a bit unprecise. It does not crash
in sense of hard-locking (where only Reset switch will revive it again),
but it becomes totally unresponsive due to excessive swapping.
Yesterday I let the f
On Mon, Nov 28, 2011 at 11:03:45AM -, Jan Rathmann wrote:
> I just did the "fork bomb test" (entering :(){ :|:&};: in a terminal) on
> my Oneiric installation, and it still crashes the system.
How does it "crash"?
What does 'ulimit -u' show from a terminal on this system?
> This should not h
I just did the "fork bomb test" (entering :(){ :|:&};: in a terminal) on my
Oneiric installation, and it still crashes the system.
This should not happen if I get this report right, so perhaps the report should
be re-opened?
A workaround for me is adding lines like
* hard nproc 4096
to /etc/se
Lucid LTS?
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Title:
process limit unlimited (regression)
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Fixed in oneiric with the merge of pam 1.1.2-3. Changelog:
pam (1.1.2-3) unstable; urgency=low
[ Kees Cook ]
* 027_pam_limits_better_init_allow_explicit_root: load rlimit defaults
from the kernel (via /proc/1/limits), instead of continuing to hardcode
the settings internally. Fall ba
For oneiric this will be fixed soon with an updated pam package. For
existing Ubuntu releases, we have not committed to providing an update.
A workaround for this is to add a line such as the following to
/etc/security/limits.conf:
* hard nproc 4096
(you may wish to adjust the value of the limit
ETA or process for fix release? We're using workarounds in an HPC
environment.
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Title:
process limit unlimited (regression)
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** Branch linked: lp:debian/pam
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Title:
process limit unlimited (regression)
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** Changed in: pam (Ubuntu)
Assignee: (unassigned) => Kees Cook (kees)
** Changed in: pam (Ubuntu)
Status: Triaged => Fix Committed
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Ti
Please switch this to importance high! This isn't only a small issue
with fork bombs:
I just stopped my system just by accidently holding down "enter" for a second
while a video file in nautilus was highlighted. This spawned a vast amount of
VLC players which in turn results in excessive swappin
Maybe just deliver a reasonably large static limit in
/etc/security/limits.conf for all users? That would quick fix the
security concerns till this bug is fixed and obsoletes it.
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Right, side-effect of having fixed the
027_pam_limits_better_init_allow_explicit_root patch so that it's
operational again.
I guess we need to duplicate the kernel's logic here for setting the
NPROC default.
** Changed in: pam (Ubuntu)
Status: Confirmed => Triaged
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** Tags added: regression-release
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** Changed in: pam (Ubuntu)
Importance: High => Low
** This bug has been flagged as a security vulnerability
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Noted from:
http://dancingpenguinsoflight.com/2009/06/watching-a-fork-bomb-explode/
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** Changed in: pam (Ubuntu)
Importance: Undecided => High
** Changed in: pam (Ubuntu)
Status: New => Confirmed
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