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On Wed, 30 Jun 1999, Wensong Zhang wrote:
>
>
> Ted Pavlic -- List Mail Account wrote:
>
> > I'm using the VS 0.5 patch for a Linux 2.2.9 kernel.
> >
> > Recently I configured 254 virtual servers on my LinuxDirector. This worked
> > fine, but whenever I tried to list them... random things would occur.
>
> Wah, this is the biggest LVS that I have ever heard!
>
> BTW, what are you using it for? could we visit it?
>
> >
> > Sometimes the kernel would give me a GPF... sometimes the machine would
> > completely lockup... Sometimes my shell would core dump... etc... etc...
> >
> > It sounds like the ipvsadm -L is not checking the size of the buffer its
> > dumping its list into before it prints it... Memory is being overwritten
> > outside of the buffer and causing problems. (I haven't actually looked at
> > the code, but I'm guessing this is the problem... buffer overflows are
> > pretty common)
> >
> > But things (the actual load balancing) work fine... as long as I don't view
> > my VLS's. :)
> >
> > Can anyone else confirm these findings?
> >
>
> Sorry that I have left this overflow bug in the code. Tomorrow I will
> release a new patch.
Hi Wensong,
I suggest that you take a look at ip_vs.c:ip_vs_procinfo(). The routine
indeed is not checking its buffer size. :-( We did not expect such large
configurations...
Best,
Rok
--
Rok Sosic
TurboLinux development team
rok@xxxxxxxxxxxxxx
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