fix segmentation fault with --offset and output wrong result with --verify #121
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1、The following command can trigger the bug:numactl --offset 4096 --length 65536 --file xxx -p0 --touch > /dev/null
Because we create a shm file, we just consider shmlen, but not consider shmoffset,resulting in the mapped memory is no within the scope of the new shm file. when we access these memory will cause SIGBUS.
2、the verify_shm function memcmp nodes,when nodemask_sz is large 64, it will output "mismatched node mask",
that's not what we expected,we expected compare nodes->mask.