group.of.nepali.translators team mailing list archive

Thread
Date

[Bug 1805105] Re: /proc/self/stack does not exist in kvm kernel, causing failures in kernel security test

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Thadeu Lima de Souza Cascardo <1805105@xxxxxxxxxxxxxxxxxx>
Date: Tue, 27 Nov 2018 17:22:45 -0000
Reply-to: Bug 1805105 <1805105@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

By the way, on 4.19, this is now only readable by root. So, now returns
EACCESS when user tries to read it.

$ cat /proc/self/stack
cat: /proc/self/stack: Permission denied

f8a00cef17206ecd1b30d3d9f99e10d9fa707aa7 proc: restrict kernel stack
dumps to root

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Disco)
   Importance: Undecided
       Status: New

** Also affects: linux-kvm (Ubuntu Disco)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: linux-kvm (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: linux-kvm (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Cosmic)
   Importance: Undecided
       Status: New

** Also affects: linux-kvm (Ubuntu Cosmic)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Xenial)
       Status: New => Invalid

** Changed in: linux (Ubuntu Bionic)
       Status: New => Invalid

-- 
You received this bug notification because you are a member of नेपाली
भाषा समायोजकहरुको समूह, which is subscribed to Xenial.
Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1805105

Title:
  /proc/self/stack does not exist in kvm kernel, causing failures in
  kernel security test

Status in QA Regression Testing:
  Fix Released
Status in ubuntu-kernel-tests:
  New
Status in linux package in Ubuntu:
  Incomplete
Status in linux-kvm package in Ubuntu:
  New
Status in linux source package in Xenial:
  Invalid
Status in linux-kvm source package in Xenial:
  New
Status in linux source package in Bionic:
  Invalid
Status in linux-kvm source package in Bionic:
  New
Status in linux source package in Cosmic:
  Incomplete
Status in linux-kvm source package in Cosmic:
  New
Status in linux source package in Disco:
  Incomplete
Status in linux-kvm source package in Disco:
  New

Bug description:
  Linux larry 4.18.0-1005-kvm #5-Ubuntu SMP Thu Nov 15 20:22:03 UTC 2018
  x86_64 x86_64 x86_64 GNU/Linux

  # ls /proc/self/stack
  ls: cannot access '/proc/self/stack': No such file or directory

  Thus:
  FAIL: test_095_kernel_symbols_missing_proc_self_stack (__main__.KernelSecurityTest)
  kernel addresses in /proc/self/stack are zeroed out
  ----------------------------------------------------------------------
  Traceback (most recent call last):
  File "./test-kernel-security.py", line 1352, in test_095_kernel_symbols_missing_proc_self_stack
  self._check_pK_files(self._095_kernel_symbols_missing_proc_self_stack, expected=expected)
  File "./test-kernel-security.py", line 1199, in _check_pK_files
  test_function(expected_restricted)
  File "./test-kernel-security.py", line 1296, in _095_kernel_symbols_missing_proc_self_stack
  '/proc/self/stack does not exist')
  AssertionError: /proc/self/stack does not exist

To manage notifications about this bug go to:
https://bugs.launchpad.net/qa-regression-testing/+bug/1805105/+subscriptions