My guess is that the test might be hitting the following code from
kernel/sched/core.c:
#ifdef CONFIG_RT_GROUP_SCHED
/*
* Do not allow realtime tasks into groups that have no runtime
* assigned.
*/
if (rt_bandwidth_enabled() && rt_policy(policy) &&
task_group(p)->rt_bandwidth.rt_runtime == 0 &&
!task_group_is_autogroup(task_group(p))) {
retval = -EPERM;
goto unlock;
}
#endif
Which is not really about the capabilities. That is just a guess.
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https://bugs.launchpad.net/bugs/1876697
Title:
test_regression_testsuite from ubuntu_qrt_apparmor failed on Focal zVM
Status in QA Regression Testing:
New
Status in ubuntu-kernel-tests:
New
Status in linux package in Ubuntu:
Incomplete
Bug description:
Issue found on zVM "kernel04" with 5.4.0-29.33
======================================================================
FAIL: test_regression_testsuite (__main__.ApparmorTestsuites)
Run kernel regression tests
----------------------------------------------------------------------
Traceback (most recent call last):
File "./test-apparmor.py", line 1746, in test_regression_testsuite
self.assertEqual(expected, rc, result + report)
AssertionError: Got exit code 2, expected 0
running aa_exec
running access
xfail: ACCESS file rx (r)
xfail: ACCESS file rwx (r)
xfail: ACCESS file r (wx)
xfail: ACCESS file rx (wx)
xfail: ACCESS file rwx (wx)
xfail: ACCESS dir rwx (r)
xfail: ACCESS dir r (wx)
xfail: ACCESS dir rx (wx)
xfail: ACCESS dir rwx (wx)
running at_secure
running introspect
running capabilities
(ptrace)
(sethostname)
(setdomainname)
(setpriority)
(setscheduler)
Error: syscall_setscheduler failed. Test 'syscall_setscheduler --
unconfined' was expected to 'pass'. Reason for failure 'FAIL: Can't set
SCHED_RR: Operation not permitted'
Error: syscall_setscheduler failed. Test 'syscall_setscheduler -- all caps'
was expected to 'pass'. Reason for failure 'FAIL: Can't set SCHED_RR: Operation
not permitted'
preparing apparmor_2.13.3-7ubuntu5.dsc... done
Error: syscall_setscheduler failed. Test 'syscall_setscheduler -- capability
sys_nice' was expected to 'pass'. Reason for failure 'FAIL: Can't set SCHED_RR:
Operation not permitted'
Error: changehat_wrapper failed. Test 'syscall_setscheduler changehat -- all
caps' was expected to 'pass'. Reason for failure 'FAIL: Can't set SCHED_RR:
Operation not permitted'
Error: changehat_wrapper failed. Test 'syscall_setscheduler changehat --
capability sys_nice' was expected to 'pass'. Reason for failure 'FAIL: Can't
set SCHED_RR: Operation not permitted'
(reboot)
(chroot)
(mlockall)
(net_raw)
Please find attachment for the complete test log.
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