Re: [bug-inetutils] Ifconfig broken on GNU/Linux arch x86_64.

[Mats Erik Andersson]

torsdag den 23 september 2010 klockan 00:56 skrev Mats Erik Andersson detta:
> onsdag den 22 september 2010 klockan 18:47 skrev Mats Erik Andersson detta:
> > Hello,
> > 
> > the code in
> > 
> >    ifconfig/system/linux.c
> > 
> > is broken on my Debian Squeeze amd64 machine. I am starting from
> > a fresh git checkout for x86 and x86_64, but the latter fails in
> > execution.
> 
> I am not yet certain that I have found the fault, but I have certainly
> found a case of buffer overrun in said function. It is easy to construct
> unusual strings -- not expected in /proc/net/dev though -- that would brake
> the code as it was until now.

The patch in the previous message is in fact the cure for the failing
functionality on x86_64. By switching the patch on and off in

   ifconfig/system/linux.c

I can reproducibly reintroduce and resolve the error at will.

The previous comment on strange name strings was a false negative,
since it was caused by an incorrect message in a printf statement
I had introduced in "ifconfig/options.c". The purpose was for
tracking the bug down. Sorry for that noise! The patch is valid,
though.


Mats E A