[grsec] pid randomization problem - process won't execute and will return zero value

Brad Spengler spender at grsecurity.net
Sun Aug 21 20:09:03 EDT 2005


> on systems with pid randomization enabled (CONFIG_GRKERNSEC_RANDPID=y),
> following will happen (example):
> 
> $ time until /bin/false; do :; done
> 
> real    0m5.336s
> user    0m1.583s
> sys     0m3.308s

It seems that the problem occurs on a regular Linux kernel as well, it 
just takes longer (tested on 2.6.11.12):
spender at gw:~$ time until /bin/false; do :; done

real    1m28.695s
user    0m15.730s
sys     0m42.141s

spender at gw:~$ time until /bin/false; do :; done

real    54m1.585s
user    14m23.566s
sys     35m39.655s

So is the problem that it happens too quickly with a grsec kernel?
Also, am I the only one who can replicate this problem in a clean Linux 
kernel?

-Brad
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