[hobbit] overflow in netbsd-meminfo.c

[Rich Smrcina]

You posted this last night:

    Memory              Used       Total  Percentage
  Physical     4294963639M 4294966523M          0%
  Swap                  0M       4098M          0%

It appears that Hobbit is reading the 'physical' line, therefore causing the negative 
value in meminfo.  If you have 4G of memory on your machine, the value is clearly wrong, 
so the error is in netbsd.  Changing the Hobbit code isn't fixing the problem, it just 
makes the value more readable... :)  Hobbit will still reflect a wrong memory value.

Tracy Di Marco White wrote:
> On Wed, Nov 12, 2008 at 10:43 PM, Rich Smrcina <rsmrcina at wi.rr.com> wrote:
> 
> It looks like the problem is this, then?
> # sysctl -a|grep physmem
> hw.physmem = -537526272
> hw.physmem64 = 3757441024
> 
> But if hobbit is using a signed int, which it does seem to be here, I
> don't see how hobbit could get it anything but wrong when there's more
> than 2 GB of RAM.
> Given this code, that's my understanding:
>    25 	int physmem;
>    67 	printf("Total:%d\n", (physmem / (1024 * 1024)));
> 
> So is this also a bug in FreeBSD, as they are also using an unsigned
> long, for this and for pagesize?
> 
> Could you help me understand why you say this is a bug in NetBSD?
> 
> -Tracy
> 
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> 
> 
> 


-- 
Rich Smrcina
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