Such a non-trivial backport has the danger of adding as many bugs as
it is intended to fix.

Therefore I will not be attempting to make this fix feasible for
3.0.x-stable, sorry.

I seriously suggest that if you really are hitting this race (the
exposure is very small, it only happens if you get redirects and
redirects are not common for most hosts) that you move to a more
recent kernel such as 3.1.x or 3.2.x, both of which have all the
dependencies as well as the bug fix applied.

I fully understand that - i'm seeing this bug 2-3 times a week while
running a bunch of > 1000 servers.

I don't want to go to 3.1 or 3.2 as they're not long term.

So i'll try to make own backport. First steps done and seems to work
fine. Sadly i'm not a C programmer...

Greets

Stefan