This sounds so much like this report I have read from the linux mint bugs nemo-file.c: add EFAULT as a valid exception to the access_ok
https://github.com/linuxmint/nemo/commit/b58bea5384436fda9cb6b31f7010f72d3c74e76a#diff-53011b366ae6f19d5347ce06d362d6ca
