Re: [patch] af_unix fix for a panic a DoS and a memory leak [Re:

Alexander Viro (viro@math.psu.edu)
Tue, 2 Mar 1999 18:35:03 -0500 (EST)


On Wed, 3 Mar 1999, Andrea Arcangeli wrote:

> On Tue, 2 Mar 1999, Michael Merhej wrote:
>
> >No, it goes back to the original "Kernel Panic" message w/ a pingable
> >machine, all tcp connections hang, and nothing works
>
> Could you give a try to such machine without compiling (or insmodding)
> unix-domain-sockets ?
>
> If you could crash the machine with a SMP kernel without
> unix-domain-sockets we would at least know that they are not the culprit.

Main strain on Michael's box comes from the thing *using* AF_UNIX. I've
looked through the oops list he had sent to me - almost everything came
from the stomped vma, two were caused by bogus kfree() (from sk_clone()),
one from find_buffer(). Something stomps on core - all those places are
doing scanning long lists and break at the first sign of memory corruption
(of any sort - software and hardware ones are equivalent here).

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