24d8697cef52cf7919f38061b4d06e4c1659c338
lseek() on directories under /sys filesystem that are part of an overlayed filesystem behave differently than in the original /sys. This causes segfault in libnuma when discovering topology information. The patch fakes return value as it is supposed to be, which also fixes the Intel MPI 2017 MPI_Init() crash.
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