Comment 3 for bug 1282314

and here is the relevant part from kern.log - also from Ubuntu 14.04:

[33753.328021] type=1400 audit(1400324186.273:72): apparmor="DENIED" operation="file_mmap" profile="/usr/bin/evince//sanitized_helper" name="/lib/x86_64-linux-gnu/libpthread-2.19.so" pid=30773 comm="chrome-sandbox" requested_mask="m" denied_mask="m" fsuid=0 ouid=0