Re: clone() <-> getpid() bug in 2.6?

[Kalin KOZHUHAROV]

Bruce Guenter wrote:
> On Mon, Jun 07, 2004 at 11:35:23PM +0000, Linus Torvalds wrote:
>
> > On Sun, 6 Jun 2004, Kalin KOZHUHAROV wrote:
> >
> > > Well, not exactly sure about my reply, but let me try.
> > >
> > > The other day I was debugging some config problems with my qmail instalation and I ended up doing:
> > > # strace -p 4563 -f -F
> > > ...
> > > [pid 13097] read(3, "\347\374\375TBH~\342\233\337\220\302l\220\317\237\37\25"..., 32) = 32
> > > [pid 13097] close(3)                    = 0
> > > [pid 13097] getpid()                    = 13097
> > > [pid 13097] getpid()                    = 13097
> > > [pid 13097] getuid32()                  = 89
> > > [pid 13097] getpid()                    = 13097
> > > [pid 13097] time(NULL)                  = 1086497450
> > > [pid 13097] getpid()                    = 13097
> > > [pid 13097] getpid()                    = 13097
> > > [pid 13097] getpid()                    = 13097
> >
> > qmail is a piece of crap. The source code is completely unreadable, and it 
> > seems to think that "getpid()" is a good source of random data. Don't ask 
> > me why.
>
>
> In this case, however, it has nothing directly to do with qmail.  This
> is tcpserver, and tcpserver only uses getpid for two things: printing
> out status lines with the PID in them (which seems perfectly valid to
> me), and once when adding to random initializer for DNS requests.
>
> This strace pattern seemed rather odd to me, so for comparison I straced
> my own tcpserver setups, and could not get them to produce more than two
> getpid calls per connection.  Something is wrong with this trace,
> possibly some weirdness in a patch, like whatever the SSL library is
> doing.

Yes, it is strange. I'll have a look at the applied patches. Without SSL there is no such getpidding :-)
Will post you (not LKML) if I find the culprit.

Kalin.

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