Bug 707138

Description of problem:
numademu with huge msize has segmentation fault

Version-Release number of selected component (if applicable):
numactl-2.0.3-9.el6.i686

How reproducible:
deterministic

Steps to Reproduce:
# numactl --show
policy: default
preferred node: current
physcpubind: 0 1 
cpubind: 0 
nodebind: 0 
membind: 0 
# /usr/bin/numademo 12g memset
1 nodes available
Segmentation fault

  
Actual results:
Segmentation fault

Expected results:
No Segmentation fault,
error message is better

Additional info:

# valgrind /usr/bin/numademo 12g memset
==23717== Memcheck, a memory error detector
==23717== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==23717== Using Valgrind-3.6.0 and LibVEX; rerun with -h for copyright info
==23717== Command: /usr/bin/numademo 12g memset
==23717== 
1 nodes available
==23717== Invalid write of size 4
==23717==    at 0x4A08E8C: memset (mc_replace_strmem.c:731)
==23717==    by 0x401DE7: ??? (in /usr/bin/numademo)
==23717==    by 0x40288C: ??? (in /usr/bin/numademo)
==23717==    by 0x40300B: ??? (in /usr/bin/numademo)
==23717==    by 0x34B141EC9C: (below main) (in /lib64/libc-2.12.so)
==23717==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==23717== 
==23717== 
==23717== Process terminating with default action of signal 11 (SIGSEGV)
==23717==  Access not within mapped region at address 0x0
==23717==    at 0x4A08E8C: memset (mc_replace_strmem.c:731)
==23717==    by 0x401DE7: ??? (in /usr/bin/numademo)
==23717==    by 0x40288C: ??? (in /usr/bin/numademo)
==23717==    by 0x40300B: ??? (in /usr/bin/numademo)
==23717==    by 0x34B141EC9C: (below main) (in /lib64/libc-2.12.so)
==23717==  If you believe this happened as a result of a stack
==23717==  overflow in your program's main thread (unlikely but
==23717==  possible), you can try to increase the size of the
==23717==  main thread stack using the --main-stacksize= flag.
==23717==  The main thread stack size used in this run was 10485760.
==23717== 
==23717== HEAP SUMMARY:
==23717==     in use at exit: 771 bytes in 9 blocks
==23717==   total heap usage: 20 allocs, 11 frees, 101,579 bytes allocated
==23717== 
==23717== LEAK SUMMARY:
==23717==    definitely lost: 0 bytes in 0 blocks
==23717==    indirectly lost: 0 bytes in 0 blocks
==23717==      possibly lost: 0 bytes in 0 blocks
==23717==    still reachable: 771 bytes in 9 blocks
==23717==         suppressed: 0 bytes in 0 blocks
==23717== Rerun with --leak-check=full to see details of leaked memory
==23717== 
==23717== For counts of detected and suppressed errors, rerun with: -v
==23717== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 6 from 6)
Segmentation fault