== SRU Justification ==
The ubuntu_bpf_jit test will fail with the following 5 test cases:
test_bpf: #292 BPF_MAXINSNS: Ctx heavy transformations FAIL to prog_create err=-524 len=4096
test_bpf: #293 BPF_MAXINSNS: Call heavy transformations FAIL to prog_create err=-524 len=4096
test_bpf: #298 BPF_MAXINSNS: ld_abs+get_processor_id FAIL to prog_create err=-524 len=4096
test_bpf: #299 BPF_MAXINSNS: ld_abs+vlan_push/pop FAIL to select_runtime err=-524
test_bpf: #300 BPF_MAXINSNS: jump around ld_abs FAIL to select_runtime err=-524
test_bpf: Summary: 337 PASSED, 5 FAILED, [329/329 JIT'ed]
And modprobe error can be found in the report as well:
modprobe: ERROR: could not insert 'test_bpf': Invalid argument
Issue can be reproduce on both zVM and Ubuntu on LPAR s390x systems.
== Fix ==
3203c9010060 ("test_bpf: flag tests that cannot be jited on s390")
A backport of the fix is needed to compile out "BPF_MAXINSNS: ld_abs+vlan_push/pop" and "BPF_MAXINSNS: jump around ld_abs' testcases. They have been removed from lib/test_bpf.c on 93731ef086ce ("bpf: migrate ebpf ld_abs/ld_ind tests to test_verifier"), however, backporting this patch would require pulling other patches as prereqs.
== Regression Potential ==
None, the fix is in a test module and only masks failing testcases on s390 only.
== Test Case ==
Load the test_bpf module, it should load without errors.
Not sure if this is related to bug 1751234 (error on AMD64 system is different)
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-11-generic 4.15.0-11.12
ProcVersionSignature: Ubuntu 4.15.0-11.12-generic 4.15.5
Uname: Linux 4.15.0-11-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: 2.20.8-0ubuntu10
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.
CurrentDmesg:
Date: Wed Mar 7 08:13:51 2018
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=/dev/mapper/kl02vg01-root crashkernel=196M BOOT_IMAGE=0
RelatedPackageVersions:
linux-restricted-modules-4.15.0-11-generic N/A
linux-backports-modules-4.15.0-11-generic N/A
linux-firmware 1.172
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
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 1753941
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.