seccomp in ubuntu_kernel_selftest failed on X/B/C s390x KVM

[Po-Hsu Lin]

There are 7 test cases failed in secomp_bpf test, and this can be reproduced with test suites from the upstream:

[ RUN ] TRACE_syscall.ptrace_syscall_dropped
TRACE_syscall.ptrace_syscall_dropped: Test failed at step #159
[ FAIL ] TRACE_syscall.ptrace_syscall_dropped

[ RUN ] TRACE_syscall.syscall_dropped
TRACE_syscall.syscall_dropped: Test failed at step #2
[ FAIL ] TRACE_syscall.syscall_dropped

[ RUN ] TRACE_syscall.skip_after_RET_TRACE
seccomp_bpf.c:1884:TRACE_syscall.skip_after_RET_TRACE:Expected -1 (18446744073709551615) == syscall(20) (14184)
seccomp_bpf.c:1885:TRACE_syscall.skip_after_RET_TRACE:Expected 1 (1) == (*__errno_location ()) (0)
TRACE_syscall.skip_after_RET_TRACE: Test failed at step #12
[ FAIL ] TRACE_syscall.skip_after_RET_TRACE

[ RUN ] TRACE_syscall.kill_after_RET_TRACE
TRACE_syscall.kill_after_RET_TRACE: Test exited normally instead of by signal (code: 0)
[ FAIL ] TRACE_syscall.kill_after_RET_TRACE

[ RUN ] TRACE_syscall.skip_after_ptrace
seccomp_bpf.c:1946:TRACE_syscall.skip_after_ptrace:Expected -1 (18446744073709551615) == syscall(20) (14184)
seccomp_bpf.c:1947:TRACE_syscall.skip_after_ptrace:Expected 1 (1) == (*__errno_location ()) (0)
TRACE_syscall.skip_after_ptrace: Test failed at step #15
[ FAIL ] TRACE_syscall.skip_after_ptrace

[ RUN ] TRACE_syscall.kill_after_ptrace
TRACE_syscall.kill_after_ptrace: Test exited normally instead of by signal (code: 0)
[ FAIL ] TRACE_syscall.kill_after_ptrace

[ RUN ] global.get_metadata
seccomp_bpf.c:2913:global.get_metadata:Expected sizeof(md) (16) == ptrace(0x420d, pid, sizeof(md), &md) (18446744073709551615)
global.get_metadata: Test terminated by assertion
[ FAIL ] global.get_metadata

Please find the complete test report here:
https://pastebin.ubuntu.com/p/tfmVypShtX/

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-43-generic 4.15.0-43.46
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic s390x
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: s390x
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Date: Mon Dec 24 03:33:04 2018
HibernationDevice: RESUME=UUID=caaee9b2-6bc1-4c8e-b26c-69038c092091
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
Lspci:

Lsusb: Error: command ['lsusb'] failed with exit code 1:
PciMultimedia:

ProcFB: Error: [Errno 2] No such file or directory: '/proc/fb'
ProcKernelCmdLine: root=UUID=c7d7bbcb-a039-4ead-abfe-7672dea0add4 crashkernel=196M
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-43-generic N/A
 linux-backports-modules-4.15.0-43-generic N/A
 linux-firmware 1.173.3
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1809630

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Po-Hsu Lin (cypressyew)]

With Cosmic s390x KVM, 6 failures reported in our source tree and in the upstream source tree:
[ RUN ] TRACE_syscall.ptrace_syscall_dropped
TRACE_syscall.ptrace_syscall_dropped: Test failed at step #127
[ FAIL ] TRACE_syscall.ptrace_syscall_dropped
[ RUN ] TRACE_syscall.syscall_dropped
TRACE_syscall.syscall_dropped: Test failed at step #2
[ FAIL ] TRACE_syscall.syscall_dropped
[ RUN ] TRACE_syscall.skip_after_RET_TRACE
seccomp_bpf.c:1884:TRACE_syscall.skip_after_RET_TRACE:Expected -1 (18446744073709551615) == syscall(20) (728)
seccomp_bpf.c:1885:TRACE_syscall.skip_after_RET_TRACE:Expected 1 (1) == (*__errno_location ()) (0)
TRACE_syscall.skip_after_RET_TRACE: Test failed at step #12
[ FAIL ] TRACE_syscall.skip_after_RET_TRACE
[ RUN ] TRACE_syscall.kill_after_RET_TRACE
TRACE_syscall.kill_after_RET_TRACE: Test exited normally instead of by signal (code: 0)
[ FAIL ] TRACE_syscall.kill_after_RET_TRACE
[ RUN ] TRACE_syscall.skip_after_ptrace
seccomp_bpf.c:1946:TRACE_syscall.skip_after_ptrace:Expected -1 (18446744073709551615) == syscall(20) (728)
seccomp_bpf.c:1947:TRACE_syscall.skip_after_ptrace:Expected 1 (1) == (*__errno_location ()) (0)
TRACE_syscall.skip_after_ptrace: Test failed at step #15
[ FAIL ] TRACE_syscall.skip_after_ptrace
[ RUN ] TRACE_syscall.kill_after_ptrace
TRACE_syscall.kill_after_ptrace: Test exited normally instead of by signal (code: 0)
[ FAIL ] TRACE_syscall.kill_after_ptrace

With Xenail s390x KVM, the test suite is outdated and it will pass with 54 tests there. With the upstream source tree, there will be 8 failures:
[ RUN ] global.KILL_process
seccomp_bpf.c:727:global.KILL_process:Expected 0 (0) != (((signed char) ((((__extension__ (((union { __typeof(status) __in; int __i; }) { .__in = (status) }).__i))) & 0x7f) + 1) >> 1) > 0) (0)
global.KILL_process: Test terminated by assertion
[ FAIL ] global.KILL_process
[ RUN ] TRACE_syscall.ptrace_syscall_dropped
TRACE_syscall.ptrace_syscall_dropped: Test failed at step #223
[ FAIL ] TRACE_syscall.ptrace_syscall_dropped
[ RUN ] TRACE_syscall.syscall_dropped
TRACE_syscall.syscall_dropped: Test failed at step #2
[ FAIL ] TRACE_syscall.syscall_dropped
[ RUN ] TRACE_syscall.skip_after_RET_TRACE
seccomp_bpf.c:1884:TRACE_syscall.skip_after_RET_TRACE:Expected -1 (18446744073709551615) == syscall(20) (5486)
seccomp_bpf.c:1885:TRACE_syscall.skip_after_RET_TRACE:Expected 1 (1) == (*__errno_location ()) (0)
TRACE_syscall.skip_after_RET_TRACE: Test failed at step #12
[ FAIL ] TRACE_syscall.skip_after_RET_TRACE
[ RUN ] TRACE_syscall.kill_after_RET_TRACE
TRACE_syscall.kill_after_RET_TRACE: Test exited normally instead of by signal (code: 0)
[ FAIL ] TRACE_syscall.kill_after_RET_TRACE
[ RUN ] TRACE_syscall.skip_after_ptrace
seccomp_bpf.c:1946:TRACE_syscall.skip_after_ptrace:Expected -1 (18446744073709551615) == syscall(20) (5486)
seccomp_bpf.c:1947:TRACE_syscall.skip_after_ptrace:Expected 1 (1) == (*__errno_location ()) (0)
TRACE_syscall.skip_after_ptrace: Test failed at step #15
[ FAIL ] TRACE_syscall.skip_after_ptrace
[ RUN ] TRACE_syscall.kill_after_ptrace
TRACE_syscall.kill_after...

[Po-Hsu Lin (cypressyew)]

This seccomp test passed on Cosmic AMD64.

[Po-Hsu Lin (cypressyew)]

On X-hwe-4.15.0-216.227~16.04.1 openstack s390x instance, this is failing with the following 4 test cases:

 [ RUN ] TRACE_syscall.skip_after_RET_TRACE
 [ FAIL ] TRACE_syscall.skip_after_RET_TRACE
 [ RUN ] TRACE_syscall.kill_after_RET_TRACE
 [ FAIL ] TRACE_syscall.kill_after_RET_TRACE
 [ RUN ] TRACE_syscall.skip_after_ptrace
 [ FAIL ] TRACE_syscall.skip_after_ptrace
 [ RUN ] TRACE_syscall.kill_after_ptrace
 [ FAIL ] TRACE_syscall.kill_after_ptrace

[==========] 61 / 65 tests passed.