bin/129706: top(1) corrupts SIZE field when a process allocates 2048GB memory

[Bruce Cran]

>Number:         129706
>Category:       bin
>Synopsis:       top(1) corrupts SIZE field when a process allocates 2048GB memory
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Dec 17 06:40:01 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Bruce Cran
>Release:        7.1-RC1
>Organization:
>Environment:
FreeBSD 7.1-RC1 amd64
>Description:
When a process allocates over 2TB, top can corrupt the SIZE field and display a series of characters instead.  It only appears to happen on TB boundaries - i.e 2048GB, 3072GB etc.  7.1-RC1 and 8-CURRENT (from 2008-12-15) both show the problem.
>How-To-Repeat:
Compile the following code and once running run top to see the process listed.

#include <stdlib.h>
int main(void)
{
  char *c = malloc(2048LL*1024*1024*1024);
  getchar();
  return 0;
}
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: