I experienced this while building my own custom CM ROM and traced it to these commits:
e459bba398e8a9eee0958d418e9b16dfabdb1515 - mmap: Reinstate passing MADV_MERGEABLE on private anonymous maps
107cdd406b8e404af4d552498076cfe2dfe5efbf - Prevent the madvise(MADV_MERGEABLE) mmap hack from affecting errno.
in bionic. Reverting them from my build enabled the GSS subsystem to load correctly. I'm not sure though if AOSP has fixes for these already or they already have a workaround in the latest builds but reverting these fixed it.
LG Nexus 4 Occam 4.3 CyanogenMod 10.2 - iRom
HTC One 4.3 CyanogenMod 10.2 - iRom
Nexus 7 (2013) 4.3 CyanogenMod 10.2 - iRom
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