everything but apache trafficserver works - https://github.com/apache/trafficserver/issues/2908 while this is sure a bug in trafficserver the kernel "don't break userspace" rule shouldn't lead to such an issue given that ATS 7.1.1 is out now for a longer time for now excluded 4.14 from the proxy machine, everything else works fine
The change is caused by commit https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04e35f4495dd560db30c25efca4eecae8ec8c375 . Based on discussions with the patch author (Kees Cook), what's happening is the stack limit once got lowered so future attempts to set it to ulimited are breaking the call to setrlimit. The userspace checking here is pretty buggy though. Relying on setulimit to always succeed is asking for trouble. Kees also noted the check is incorrect (should be checking r.rlim_cur != r.rlim_max). The behavior of no kernel regressions doesn't apply to buggy programs so I don't think there is anything for the kernel to fix here. I moved this to trafficserver for it to get fixed there.
that's why i just commented but kept my +1 bodhi karma - it needs to be fixed somehow in the near future since 4.13 is EOL
https://github.com/apache/trafficserver/commit/0cdb610c311ccc9f67c9cf83460a8a11976e4e1b.patch [root@proxy:~]$ uname -r 4.14.4-200.fc26.x86_64 [root@proxy:~]$ rpm -q trafficserver trafficserver-7.1.1-4.0.fc26.20171214.rh.sandybridge.x86_64
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