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== Comment: #0 - Breno Henrique Leitao <bren...@br.ibm.com> - 2017-05-11
15:30:52 ==
The PR_DUMPABLE flag causes the pid related paths of the proc file system to be
owned by ROOT.
The implementation of pthread_set/getname_np however needs access to
/proc/<pid>/task/<tid>/comm. If PR_DUMPABLE is false this implementation is
locked out.
This patch installs a special permission function for the file "comm" that
grants read and write access to all threads of the same group regardless of
the ownership of the inode. For all other threads the function falls back to
the generic inode permission check.
Nvidia-docker issue on ppc64le:
1b3044e39a89cb1d4d5313da477e8dfea2b5232d
This is fixed by commit 1b3044e39a89cb1d4d5313da477e8dfea2b5232d
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage)
Status: New
** Tags: architecture-ppc64le bugnameltc-154432 severity-high
targetmilestone-inin---
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nvidia-docker on ppc64le-ubuntu16.04 issue due to cross-thread naming if
!PR_DUMPABLE
https://bugs.launchpad.net/bugs/1690225
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