Re: dietlibc broken on i386 since Feb 2018?

Reject due to wrong sender address, repeating...

On Tue, Oct 08, 2019 at 08:29:00PM +0200, Frank Bergmann wrote:
> On Thu, Oct 03, 2019 at 09:08:00PM +0200, Felix von Leitner wrote:
> > to be compiled with support for it, or not. This means doing additional
> > stuff in the startup code, namely initialize one variable to a random
> > value, and it has to be real randomness for security reasons.
> 
> Got it.
> 
> > The way dietlibc does this is take the randomness the kernel hands it,
> > and there really is no other good way to do it, that is why this is
> > turned on by default. The alternative is to read from /dev/urandom, but
> > that can fail in chroot environments or if the file table is full. What
> > then? Abort the binary? That is clearly also bad.
> > 
> > The only recommendable fix is to tell people to use a kernel which
> > supports passing randomness.
> 
> Sure, I got it.
> 
> > Newer kernels also have a system call to get randomness, but that was
> > added even later so it does not help with this problem.
> > 
> > > > 2.6.18 was released in 2006.
> > > > If that is not ancient then what is?
> > > haha... I thought that sysenter was introduced even long before that - and
> > > this is still configurable in dietfeatures. ;-)
> > 
> > So is this feature.
> > 
> > What is your point?
> 
> Kidding, just kidding, Felix. :-)

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