On Tue, Mar 19, 2019 at 09:46:38AM -0000, kenn wrote:
> I have that bug, i/o screenlet won't run because of insufficient
> permission. Will it be fixed in the 4.4.0-143 kernel?

This was an intentional change:

https://marc.info/?l=git-commits-head&m=151163650225215&w=2
https://lkml.org/lkml/2018/12/20/346

The file /proc/timer_list may be removed in the future:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=844056fd74ebdd826bd23a7d989597e15f478acb

Thanks

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https://bugs.launchpad.net/bugs/1818170

Title:
  xenial linux 4.4.0-143.169 ADT test failure [/proc/timer_list:
  Permission denied]

Status in QA Regression Testing:
  Fix Released
Status in ubuntu-kernel-tests:
  Fix Released
Status in linux package in Ubuntu:
  Invalid

Bug description:
  Testing failed on:
      amd64: 
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial/xenial/amd64/l/linux/20190228_103241_6fdc6@/log.gz
      i386: 
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial/xenial/i386/l/linux/20190226_190740_8dbe6@/log.gz
      ppc64el: 
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial/xenial/ppc64el/l/linux/20190226_183159_8dbe6@/log.gz
      s390x: 
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial/xenial/s390x/l/linux/20190226_174407_8dbe6@/log.gz

  Test suite: ubuntu_qrt_kernel_security.test-kernel-security.py
  Test case: test_095_kernel_symbols_missing_proc_time_list

  16:57:44 ERROR| [stderr] test_095_kernel_symbols_missing_proc_time_list 
(__main__.KernelSecurityTest)
  16:57:44 ERROR| [stderr] kernel addresses in /proc/timer_list are zeroed out 
... FAIL

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