[Samba] [3.2.0] Off by one error

Jeremy Allison jra at samba.org
Wed Jul 2 23:27:47 GMT 2008

On Wed, Jul 02, 2008 at 06:46:50PM -0400, James Kosin wrote:

> I'll have to get back to you later on the backtrace gdb is broken on my 
> machine.
> It is 100% reproducable by including an interfaces line with the IP and 
> mask as the parameter.  And only happens on startup when nmbd is loading 
> the configuration.  If I change the interfaces line to read just the single 
> IP without the mask all is fine.
> I'll check to see if this was a change to how the interface line is 
> specified or a problem that has always been there.  And wasn't caught until 
> safe-copy was used.
>    interfaces
> breaks the nmdb with an error; but doesn't stop nmdb.
>    interfaces
> works and no error is reported.

Ok, I've found it. It's a warning, not an error.
We've correctly set up the interface here but
we're just trying to set the interface name.

It happens here lib/interface.c:

472         safe_strcpy(ifs.name, token, sizeof(ifs.name)-1);

Where token is set to "" which is greater
than ifs.name. We've already parsed out the values for
ss, ss_mask and ss_bcast we're just trying to give the
pseudo interface a name.

I'll replace this with strlcpy and it should be fine.

Thanks for the report though !


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